Drainage_DPR.pdf

No.: RMC/JnNURM/DRN/01-06/0508

Detail Project Report (DPR) for Drainage Phase-II & Phase-III (Part-1) for Rajkot city

Estimated Cost

Period

Rs. 7688 Lakhs

05-06 TO 07-08

Date of Preparation

Date of Submission

Rajkot Municipal Corporation Dr. Ambedkar Bhawan Dhebarbhai Road, Rajkot – 300 001 ( Gujarat – India) Ph: 2224133, 2239973; Fax:+91-281-2224258 E-mail: [email protected]; url: www.rmc.gov.in

No.: RMC/JnNURM/DRN/01-06/0508

Detail Project Report (DPR) for Drainage Phase-II & Phase-III (Part-1) for Rajkot city

Contents

C Co on ntteen nttss Forward Executive Summary 1.0 INTRODUCTION…………………………………………………….………….…….. 1.1 Background 1.2 Need of the Project 1.3 Objectives 1.4 Scope & Limitation 1.5 Methodology

1

2.0 BACKGROUND ……………………………………………….…………….. 2.1 Sectoral Policies outlined in CDP 2.2 Linkage of the projects to the CDP

4

3.0 CHARACTERISTICS OF THE AREA………………………………………………….... 6 3.1 Regional Profile with Location Map 3.2 Climate & Rainfall 3.3 Geography 3.4 Environmental Setting 3.5 Growth of City 3.6 Settlement Pattern 3.7 Demographic Profile 3.8 Land Use 3.9 Housing 3.10 Civic Authorities 3.11 Status of Legislation 4.0 EXISTING SYSTEM OVERVIEW……………………………………………………….. 4.1 General 4.2 Rajkot Underground Drainage work –Phase-I & Phase-II 4.3 Rajkot Underground Drainage work Phase-III 4.4 Rajkot Water Supply

22

5.0 EXTENT OF PRIVATISATION………………………………………………………. 5.1 Privatization experience of rmc 5.2 Operation of drainage pumping stations 5.3 Privatization of public grievance cell of drainage department 5.4 Scope for further privatization

28

6.0 DETAILED ENGINEERING DESIGN ………………………………................................33 6.1 Drainage phase-ii (part -1) 6.2 Drainage phase-ii (part-1) sewage treatment plant of 44.50 mld 6.3 Drainage phase-iii (part-1) 6.4 Design of sewage treatment plant at raiya under phase-iii (part-1) 7.0 DETAILED ENGINEERING DESIGN- MECHANICAL & ELECTRICAL ……………. 87 7.1 Necessity of Auxiliary Pumping Stations for Drainage Phase-III 7.2 Criteria proposed for Mechanical works 7.3 Criteria proposed for Electrical Aspects 7.4 Pumping Mains of APS & MPS

Detail Project Report for Drainage Phase-II &II (Part-I) for Rajkot city

i

Contents 8.0 RECOMMANDATIONS..............................................………………………….… 8.1 Issues and Performance Assessment 8.2 SWOT Analysis 8.3 Recommendation

92

9.0 COST ESTIMATES …………………………………….……………………….. 9.1 General 9.2 Based for Cost Estimate 9.3 Cost Estimate for Phase-II (Part-1) 9.4 Cost Estimate for Phase-III (Part-1) 9.5 Total Estimates of Drainage Work Phase-II & Phase-III (Part-1)

97

10.0

Financial Analysis ...........................……..……………………...................... 10.1 General 10.2 RMC Finance 10.3 Present Tariff, Billing and Collection Service Connection 10.4 Drainage Projects & Project Funding

170

11.0

Summing up.. …………………………………. ...……………………………… 11.1 Conclusion

174


ii

Contents

LLiisstt ooff TTaabblleess Table No.

Table Details

Table 1 :

Planning for JnNURM projects.

Table 2 :

Quality of Air

Table 3 :

Population Growth in Rajkot city

Table 4 :

RMC Population projection

Table 5 :

Status of Land Development

Table 6 :

Important Section of BPMC Act.

Table 7 :

GTP & UD Act, 1976 relevancy for MC Infrastructure Development

Table 8 :

Phasing of Sewage

Table 9 :

Phase-I & Phase-II

Table 10 :

Drainage Network (For Old city) –Phase-I & II

Table 11 :

Details of Pumping Station

Table 12 :

Quality of Sewage before & after treatment

Table 13 :

Sources of water

Table 14 :

Zones & Storage Capacity & supply

Table 15 :

Water supply Distribution Net works

Table 16 :

No of Complaints

Table 17 :

Unit sizing: Conventional Activated Sludge Process

Table 18 :

Unit sizing Facultative Lagoons followed by Extended Aeration

Table 19 :

Unit Sizing: Anaerobic Lagoons followed by Aerated Lagoon

Table 20 :

Unit Sizing: Upflow Anaerobic Sludge Blanket Reactor

Table 21 :

Details of T.P.Roads in Town Planning Schemes

Table 22 :

Hydraulic properties of circular sections for Manning's formula

Table 23 :

The Detials Of Designed Capacity Of Pumping Stations For Rajkot Sewerage Project

Phase-

III Table 24 :

The Details Of Designed Pumps And Motors For Pumping Stations For Rajkot Sewerage Project Phase-III

Table 25 :

Abstract Of Cost Estimate For Phase-II

Table 26 :

Summary Of Estimated Project Cost

Table 27 :

Bill Of Quantities For Collective System of T.P. scheme no. 1 part 1, T.P. 1

Table 28 :

Bill Of Quantities For Collective System of T.P. scheme no. 1 part 2, T.P. 4

Table 29 :

Bill Of Quantities For Collective System of T.P. scheme no. 6

Table 30 :


Table 31 :


Table 32 :


Table 33 :


Table 34 :


Table 35 :

Bill Of Quantities For Collective System of T.P. scheme no. 8 slum

Table 36 :

Bill Of Quantities For House Connection of T.P. scheme no. 1

Table 37 :

Bill Of Quantities For House Connection of T.P. scheme no. 1 Part 2 & T.P. 4

Table 38 :

Bill Of Quantities For House Collection of T.P. scheme no. 6

Table 39 :



iii

Contents Table 40 :


Table 41 :


Table 42 :


Table 43 :


Table 44 :

Bill Of Quantities For House Collection of T.P. scheme no. 8 slum

Table 45 :

Bill Of Quantities For House Connection of T.P. scheme no. 1

Table 46 :

Bill Of Quantities For House Connection of T.P. scheme no. 1 Part 2 & T.P. 4

Table 47 :

Municipal Revenue Income

Table 48 :

Level of subsidies

LLiisstt ooff M Maappss No. Map:

1

:

Location Map

Details

Map:

2

:

Development Plan of Rajkot.

Map:

3

:

Drainage Status


iv

Contents

A Abbbbrreevviiaattiioonnss ALV APMC ARV BOD BPMC CA CBO CCP CDS CEPT COD CPHEEO CUR DA FOP GIDC GMFB GOG GOI GPCB GSRTC GUD & HD GWSSB HUDCO IMR JnNURM NGO NIOH OR PF RCC REA RMC RTO RUDA SC SPM ST SWOT TDS UDPFI WPR

Annual Legitable Value Agricultural Produce Market Committee Annual Ratable Value Bio-Oxygen Demand Bombay Provincial Municipal Corporations City Administration Community Base Organization City Corporate Plan City Development Strategy Centre for Environmental Planning and Technology Chemical Oxygen Demand Central Public Health & Environmental Engineering Organization Capital Utilization Ratio Dearness Allowance Financial Operating Plan Gujarat Industrial Development Corporation Gujarat Municipal Finance Board Government of Gujarat Government of India Gujarat Pollution Control Board Gujarat State Road Transport Corporation Gujarat Urban Development & Housing Department Gujarat Water Supply & Sewerage Board Housing & Urban Development Corporation Infant Mortality Rate Jawaharlal Nehru National Urban Renewal Mission Non Governmental Organization National Institute of Health Operating Ratio Provident Fund Reinforced Cement Concrete Rajkot Engineering Association Rajkot Municipal Corporation Regional Transport Office Rajkot Urban Development Authority Schedule Caste Suspended Particulate Matter Schedule Tribe Strength, Weakness, Opportunities and Threats Total Dissolved Solids Urban Development Plan Formulation and Implementation Workers Participation Rate


v

Rajkot Municipal Corporation

Introduction

1

Introduction

1.1 Background Rajkot City with a population of one million (as per census 2001) and with an area of 104.86 Sq. Kms. is situated on the bank of river Aji. This fortified town on the West bank of Aji river was founded by the then ruler of Sardhar in the year 1608. The city is having good road, Rail and Air links with other important centers of the Country. Rajkot city has taken rapid strides in industrial and commercial development and is growing in to an important urban center in the State. Further, very fast industrial development also took place in the vicinity of Rajkot city. Area, like Sapar-Veraval and Lodhika Industrial Estate have also affected in the growth of population of Rajkot city and urban area of Rajkot remarkably. The metropolitan areas, cities and towns have attracted a large numbers of rural migrants for employment, higher education, purchases, medical treatment etc. Due to heavy rush on cities, Government of Gujarat formed independent autonomous urban development authority for six cities in the year 1978. Rajkot Urban Development Authority (RUDA) was formed on 30th January 1978. The authority has to plan, implement and follow up the development of 483 sq.km. This area includes Municipal Corporation and 39 villages in the immediate periphery of the city. Till June 1998 the authority had prepared eight town planning schemes in the immediate periphery of the city boundary towards west side of the city and covered land of three villages namely Raiya, Nanamava and Mavdi. Because of the development took place in the town planning scheme area, basic infrastructure facilities were sought out by the residents and ultimately in the year 1998, city limits of Municipal Corporation on western area (Mavdi, Nanamava and Raiya) was extended for 35.86 Sq.Km and total area of city limits became 69 sq.kms. to 104.86 sq.km. This resulted total population of the city about one million ( as per Census 2001). With the rapid growth of the city, the need arise to augment the existing basic infrastructures services of the city. Since the extended area was without any kind of infrastructure facilities these basic service needs to be implemented on priority basis.

On Implementation of Phase-II (Part-I) project there will be 90% coverage of drainage net work in old city area while in newly merged area as on date no sewerage system exists and presently the sullage water is being disposed of through surface drainage. On Implementation of the Phase-III ( Part-I) project the coverage would be about 42% .

1.2 Need of the Project The city is developing at a rapid pace and the population is expected to reach about 1.5 million by the year 2011. The generation of sewage in the year 2011 would be about 210 MLD, while existing net work and sewerage Treatment Plant is about 44.50 MLD only . This needs spcial attention on augmentation of STP and /or new STP

Detail Project Report for Drainage Phase-II & III (Part-I) for Rajkot City

1


Introduction

Govt of India recently launched urban Infrastructure development mission for selected 63 cities of India as Jawaharlal Nehru National Urban Renewal Mission (JnNURM) which also encourages preparing Detail Project Report for under ground drainage project Phase-II ( Part-I) and PhaseIII(Part-I).

1.3 Objectives The broad objectives of the Detail Project Report (DPR) are to determine a technically and economically viable Sewerage & Sewage Treatment project for a phased implementation to meet the requirements of the year 2030. Following are the specific objectives: 1. Assessment of the existing supply situation 2. Population and generation of sewage projections 3. Planning for Projects identified for JnNURM 4. Project scheduling & cost estimates 5. Projects phasing 6. To prepare operational plan 7. Organizational and financial studies 8. To set recommendation with respect to JnNURM reforms & sustainability

1.4 Scope & Limitations of the study 1. The study is limited to Rajkot city admeasuring area app.75 sq.kms. out of 104.86 sq.kms. 2. The study is limited to Drainage DPR for Rajkot city Phase-2 ( Part-I ) and Phase-3 ( Part-1) which are identified and outlined in City Development Plan ( 2005-2012) 3. Projects which are identified in CDP for RUDA area are excluded. 4. The DPR of remaining 30 sq.kms is under way of preparation and same is planned to be processed in the year 2007-08.


2


Introduction

1.5 Methodology Aim/Objectives

Situation analysis Waste water characteristics

System analysis

Water supply network • Land use. • Population. • Population density zone wise. • Quantity of domestic waste water generated • Quality of waste water

♦ Institutional and financial analysis Staff structure for the drainage department Total capital investment for the sewerage system O & M expenses for sewerage system Existing Tariff Structure Level of Subsidy Proposed Tariff structure

♦ Total Quantity of water supply in MLD ♦ Quality of water ♦ Seasonal variation in water supply and consumption pattern

Sewerage network and treatment plant ♦ Quantity of waste water collected through sewerage system ♦ Present net work analysis fully covered area partly covered area un covered area present capacity of treatment plant ♦ Quantity of waste water collected through sewerage system ♦ Methods of effluent disposal

Identification of problems and issues

Requirement Assessment • Civil Design • Mech/Elect Design •

♦ Future requirement Population forecast Future Land use Water supply

Selection of best alternatives for cost • Costing

•

Implementation •

Drainage DPR (Phase II & III (part-I)


3


2

Background of the study

B Baacckkggrroouunndd ooff tthhee ssttuuddyy

2.1 Sectoral Policies outlined in CDP Rajkot Municipal Corporation with the financial assistance from World Bank, an underground sewerage project was implemented costing Rs.40 crores and the said project was commissioned in the year 1994 with coverage area of 40sq.kms..Rajkot Municipal Corporation has taken up the work to connect the left out area of with underground drainage system and as on implementation of Phase-II work the 90% of old city area will be covered under underground sewerage system. As on date for new area the coverage is nill. The present sewage of old city is being collected through about 350 Km long collective system with 7 nos. of intermediate pumping stations. The whole network will cover approximately 60 sq.kms. of area with coverage of population about 6.5 Lakhs. The sewage is being pumped to the sewage treatment plant, which is located at 5 kms distance from the city. The capacity of the plant is 44.5 MLD, however, it is inadequate to cater the present quantity of sewage about 57 MLD, the process design of the plant is Facultative Lagoon followed by extended Aeration. In accordance with suggestions of citizens, elected representatives, officials & officers of RMC and other stakeholders involved in the entire city development plan process the outcomes and vision for Drainage net work for city the describe the total coverage. Outcomes also assumed that no sewage disposal without treatment to the river. This will require infrastructure development fund as suggested in JnNURM projects expenses. To achieve these out comes following strategies have been formulated in City Development Plan. These are the core value of this Detail Project Report DS1

: New Sewer Program & Sewage Planning_ This program is aimed at improving

the coverage of city waste water and also to cater population of newly merged area. It is proposed to augment existing drainage net work of old city limit by adding more 20 sq.kms. area and to implement an underground drainage system to the present developed area of 15 sq.kms (Out of 35 sq.kms newly merged area)> Similarly newly area the capacity of the plant will be 51 MLD. DS2:

Wastewater Treatment Planning_ the existing sewage treatment having capacity of

45 MLD, which is required to augmented by another 45 MLD. It is proposed as a part of city corporate plan that in the first phase during 2007, the STP is to be augmented for 45 MLD then after successively the capacity can be augmented. DS3

: Coverage of Low Income Settlements_ There is 84 slum notified slum area within

the old city limit of Rajkot. Existing drainage net work passes near to at least 55 slum areas. Therefore it is proposed to cover this locality by using Pay & Use type toilet facility under GOI & GOG scheme of Valmik Swatchhata Abhiyan. The same has been implemented by the Corporation. This will serve as part of slum networking program. It is proposed to use budgetary head of 63\2 as matching fund requirements Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

4


Background of the study

: Sewage Operation & maintenance _ Presently RMC privatized the O& M works.

DS4

It is found more effective, & economical. Therefore it is proposed to widen the scope of present contract system.

2.2 Linkage of the projects to the CDP Projects formulated and identified in CDP for drainage focus on_ Phase-II (Part-I) works for Rajkot inner city / old city area which consists of works of collective systems, house connections, pumping station STP etc.,. works of Phase-III i.e. work of newly merged area which consists of house connections, collective system , pumping stations STP etc., for newly merged area. JnNURM projects are identified as under:

No.

Details

20052006200706 07 08 Rajkot Under ground drainage project Phase -II old city area 1 Work of collective system & 300 300 300 house connections for inner city area

Year 200809

Rs. In Lakhs 20092010201110 11 12

Total

300

245

50

50

1545

15 135 0 0 Additional pumping machinery in various pumping station 3 Work of Rising main from 50 455 0 0 poptpara pumping station to sewage treatment plant 4 Extension of existing treatment 0 400 200 200 plant by 44.5 MLD at Madhapar Rajkot Under ground drainage project Phase -III for newly merged area 5 700 700 700 700 Const of main line , collective

50

50

50

300

0

0

0

505

0

0

0

800

500

500

500

4300

2

6

7

8

9

system & house connections in new area & road reinstating work Pumping stations & with electrical mechanical allied works in new area Const of Sewage Treatment Plant of 51 MLD capacity at Raiya Purchase of equipments - Jetting machine-03, cleaning machine 10, power bucket -23 dewatering set-10 sets , safety equipment Development of MIS and Redressal system Total Phase wise percentage

200

200

268

0

200

200

100

1168

0

400

570

0

0

600

500

2070

0

200

500

0

0

0

300

1000

20

0

0

0

0

0

0

20

1285 10.98

2790 23.83

2538 21.68

1200 10.25

995 8.50

1400 11.96

1500 12.81

11708 100

.

Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

5


Characteristics of the area

C Chhaarraacctteerriissttiicc ooff tthhee ssttuuddyy aarreeaa

3

3.1 Regional Profile with Location Map Rajkot is situated in the middle of the peninsular Saurashtra in central plains of Gujarat State of Western India at a height of 138 m above mean sea level. It lies between latitude 22.18 N and longitude 70.51 E. It has an area of 104.86 sq. kms Rajkot is head quarter of Rajkot District and the city is connected with other parts of the country by Rail, Road and Air. There are broad gauge railway line of Western Railway between Viramgam-OkhaPorbandar and meter gauge railway line

between

Jetulsar-Veraval-

Bhavanagar. It is also well connected by broad gauge railway line with Delhi and Bombay the important two Metropolitan cities of India. Also there are major roads and NH-8 a links Kandla, NH-8 B links Porbandar and state capital Gandhinagar. State highways connect Rajkot to other important towns of the region like Surendranagar,Porbandar, Junagadh, Veraval, Bhavnagar, Amreli, Bhuj, Kandla, Ahmedabad,, Baroda etc., The city is also served by an aerodrome and linked by air with Baroda, Bhuj, Bombay, Delhi and Ahmedabad.

3.2 Climate & Rainfall Climate: The climate in the city is hot and dry. The average maximum and minimum temperatures recorded over the last 40 years are 43.5 deg C and 24.2 deg C respectively. Rainfall: The average annual rainfall is 500mm. However, over the last 60 years, it has been below normal during 20 years. In these years, the city along with the Rajkot Urban Development Area (RUDA) faced acute water shortage. The average annual rainfall is observed about 500 mm. in the area.

3.3 Geography Rajkot forms central part of

Saurashtra Peninsula and has a diverse landscape made up of

plateau, hills, linear ridges and alluvial plains. The southern and western parts of the city are primarily covered by Deccan Traps, characterized by undulating topography with the presence of plateaus at some locations. In the northern part, topography is plain with gentle slope towards north and west. The average elevation attained in the district is 130 meters above mean sea level. The general topography of RMC area is almost undulating with level difference from 125 m to 158 m from south east to north west. The city of Rajkot is situated along the Aji River, which is seasonal in nature. The main tributary of Aji in the area is khokhadadi located on southwest side of Rajkot city. Two nos at natural Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

6



water reservoirs (lakes) are located near Rajkot city viz. Lalpari and Randerda, at the distance of 4 kms and 6 kms respectively from the city. Across the river Aji , Aji reservoir is built up at a distance of 9 kms from Rajkot city and Aji II at a distance of 15 kms. In the RUDA area Nyari I and Nyari II reservoirs are constructed which are located within of 15 Kms to 30 Kms from the city. In addition to this, for draining storm water, Nos. of Natural courses exist, in RMC and RUDA areas which are ultimately meting to river Aji to drain storm water. Soil Type: Soil of the entire Rajkot area can be broadly classified as medium black to shallow black. The black soil, being rich in minerals and organic matter is more fertile. These soils have been formed even from granite and gneiss parent materials. The depth of the top soil is generally 25 cm to 50 cm deep. The color of soil surface varies from light gray to dark gray and is clayey in texture. The soil reaction is neutral to alkaline with Calcium Carbonate. Beyond 50 cm depth the under ground strata are soft rock & hard rock. The vegetative cover is minimal in the open area due to lack of adequate topsoil. The topsoil is underlain with hard rock formations thereby limiting the growth of vegetation in the region. . Ground Water Table The fluviomarine alluvium of Upper Tertiary to Quaternary age forms poor aquifer because of the predominance of argillaceous nature of formations and poor quality of ground water. The ground water occurs under water table and confined conditions. Depth of tube wells ranges from 30 to 120 meters below ground level, whereas depth to water level ranges from 20 to 100 meter below ground level. The seasonal fluctuations in the water table ranges from 1.8 to 12.0 meters. The yield from the tube wells ranges from 2.50 to 10.00 cubic meters/day. In hard rock areas the availability of ground water in a particular year is the direct response to intensity of monsoon and quick response is seen in such aquifers. In the years of normal and above normal rainfalls the water level decline. The seasonal availability of ground water also varies widely. Rajkot district forms central part of Saurashtra Peninsula and has a diverse landscape made up of plateau, hills, linear ridges and alluvial plains. The southern and western parts of the district are primarily covered by Deccan Traps, characterized by undulating topography with the presence of plateaus at some locations. In the northern part, topography is plain with gentle slope towards north and west. The east west trending linear ridge forming upland south of Rajkot forms water divide for south & southwesterly flowing drainage basin of Bhadar and north & northeasterly flowing drainage basins of Aji, Machhu etc.

3.4 Environmental Setting The presence of industrial and commercial activities on a large scale, in and around Rajkot, tends to have strong impact on the environmental quality of the city. The concentration of polluting industries such as the foundries, electroplating units, Sari –printing, manufacturing of dyes and chemicals within the city and lack of basic infrastructure particularly, inadequate drainage connections and bio-medical waste generation tends to take its toll on the environment. Issues related to air pollution, water pollution and pollution from waste is much of concern about citizens. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

7



Air Pollution : The principal sources of Air pollution in Rajkot are from vehicular emissions, industrial emissions, construction related activities. Uses of Kerosene as fuel by Auto- rickshaw, pollution

from

Chhakada

and

emission relatively

of more

Month

numbers of the two-wheelers are sources

of

vehicular

While

sources

emissions.

of

industrial

emissions are mainly from the foundries, small scale industries and bricks manufacturing kilns. Ambient

air

quality

Aug-2003 Octo-03 Dece-03 Feb-04 Apr-04 July-04 Aug-04 Sep-04

Table : 5.1 Quality of Air SO2 in µg/cu.mt. NOXµ µg/cu.mt. Indu. Area 24 17 18 21 25 7 12 13

Resi. Area NA 17 14 7 15 23 10 11

Indu. Area 18 10 24 21 21 14 12 18

Resi. Area NA 14 19 7 14 8 13 10

SPM in µg/cu.mt. Indu. Resi. Area Area 550 NA 230 120 310 210 190 210 320 130 180 180 230 210 240 160

monitoring is carried out at three locations by Gujarat Pollution Control Board (GPCB) since 2000. The Monthly average of SO2 , NOX, and SPM of last year as collected from two station viz., Aji GIDC Industrial area and GPCB Office- residential area are as shown in the table below: O2 and NOX levels in Rajkot are within the NAAQS (Monthly Average) during both the years. However, the SPM levels in Rajkot are found exceeding NASQS(Monthly Average) during both the years, particularly in Industrial Area and 50% time in a year in residential area. Water Pollution: The city lies within the watershed expansion of Aji river basin and it is network of 19 natural drainage courses, locally known as Voklas. Unfortunately, these voklas are being used for sewage disposals resulted the pollution of water Aji- river in down stream of Aji dam. Nyari-2 dam which collects water from Aji river and Nyari river is fully polluted water dam. An analysis of different water bodies in down stream of Aji dam indicates the most of water bodies within city limit are contaminated. Pollution of under ground water due to electro-plating industries and sari-printing industries is also observed. Pollution due to SW : The main causes for pollution include increasing household and commercial waste, commercial waste as well as bio-medical waste. Though, Rajkot Municipal Corporation is making efforts to ensure minimize the solid waste at source, but the result is not being seen up to the mark.

3.5 Growth of City The city does not have a long history. It was founded by the then ruler of Sardhar 1608 A. D. on the west bank of the river Aji as a small fortified town. by Ruler of Sardhar Gradually, it became a Princely State in the year 1805. The British Government developed the old city area popularly known as Sadar during 1820 to 1870. The old town and Sadar area being part of the city were developing simultaneously.

Both these areas were separated by North-South Railway track then existed but

subsequently railway track was removed. Both these areas merged with each other resulting in coordinated development of the town. Hence the city developed from a village, civic development was Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

8



in the process and in the course of time some of the major works came to be permanently visible. To name some of them, we can mention Raj Kumar College, Alfred High School which was subsequently named Mahatma Gandhi High School, Jubilee Garden, Railway line, Railway Junction, Lakhajiraj Railway Station which geared up the development of whole town of Rajkot. By the end of 19th century, Rajkot emerged as a premier town having a population of 36,000. Rajkot was capital of Ex-Saurashtra State and has a central location in the region being a part of Gujarat State. Its importance as a capital is attributed to geographical location, its cultural heritage and the development potential possessed by the city.

The present level of development of the city is

outcome of the process of progressive development going on since decades. It will be useful to recall the historical background of the city enjoying a position of importance in the field of Trade, Industry, Education, Transportation, Communication, Entertainment and urbanization. Rajkot is also affected by the wave of rapid urbanization and industrialization in the country over the last few decades. The development of trade and industry has gradually reshaped the life of the people. In the earlier period, the establishment of cloth mills in the city led to the development of new residential areas like Millpara, Harishchandra Plot, Gundawadi, Kevdawadi etc. The new Railway Station known as Bhaktinagar station also came into being. Further, around the year 1940, new industrial estates, residential areas, schools, colleges, cinema houses came into being. Thereafter, Rajkot eventually became a vibrant trading city with a wide network of transport facilities by air, railway and road. A number of transport companies established their head offices at Rajkot. The Industrial Estates known as Bhaktinagar Industrial Estate and Aji Industrial Estate were established. Trade and Industry fast developing in the city also attracted foreign investment during these periods. This trend of city development generated rising demand for creating new civic amenities in the city.

3.6 Settlement Pattern Rajkot is a town of comparatively recent growth. In about 400 years, it has developed from a small hamlet to a prosperous town today. Up to 1820 the growth was not too rapid, but after the British government established its camp in 1822 the town opened new directions of growth. The industrial development and the urban influence of the city started with the establishment of the first textile mill in the region towards the end of 1910;. About 60 industrial units came into existence between 1900-1920 , which induced development of the city to a great extent. With the have the industries trade and commerce also flourished inviting the immigrant population to a large extent. With increasing industrial, trade and commerce activity, there has been tremendous growth in the population of the town. The city’s population has been experiencing an average growth of around 50 % since 1961. There was a sudden increase in the population in 1941-51 decade ( 99%) which was because of large number of government offices being established in the city of Rajkot after formation of Gujarat


9



state, creating large number of employment opportunities. However, since then the decadal growth rate is fluctuating between 41% to 54%. The city has grown up in area from 150 hectare in 1901 to 10404 hectare in 1998. i.e. it has growth approximately 70 times of its initial size. The city is growing rapidly in western direction. However, city is also simultaneously growing in all direction. The city can be divided in to three parts due to Aji River and railway tracks, which are passed through the city. The city has greater and prosperous development on the western side, Industrial development on Southern side and low-income housing towards northeastern side. At present, Rajkot Municipal Corporation covers an area of 104. 86 sq.kms. including merged three area viz., Raiya, Nana-Mava and Mavdi area. The city is divided in to 23 administrative wards.

3.7 Demographic Profile Population Growth trends The population of Rajkot city is 10,02,000 as per the 2001 census. The population has grown from 36,151 in 1901 to 10,02,000 by the year 2001. with an average annual growth rate of 3.29%. Table: Population Growth in Rajkot city

During independence period Rajkot city

Year

Population

Growth rate

1901

36151

---

large

1911

34191

-5.42

immigrants’ refugee from Pakistan. Also in the

1921

45845

+34.08

last decade the city registered the growth rate of

1931

59122

+28.96

79.12% , this is attribute to the increasing the

1941

66353

+12.23

Corporation

1951

132069

+99.04

1961

194145

+47.00

1971

300112

+54.58

1981

445076

+48.30

1991

559407

+25.69

2001

1002000

+79.12

experienced highest growth rate 99.04% in between

1941

to

limit

1951

by

because

merging

surrounding village in June-1998.

of

the

three

Chart :1.1.2. Population Growth in Rajkot city


10



Rajkot City Population Trends 1100000 1000000 900000

Population

800000 700000 600000 500000 400000 300000 200000

2001

1991

1981

1971

1961

1951

1941

1931

1921

1911

0

1901

100000

Year Population Projections: The trend of population growth is an important indicator and base for the assessment of future requirements of basic in the area for the future. In 1963, the RMC area was extended from 38 Sq Kms to 69 Kms. Again in June 1998 the RMC area was extended by another 34.865 Sq Kms. This is credited to the immense growth in trade, commerce and industry, in and around Rajkot. Population projections for the RMC area have been carried out on the basis of the past growth trends. It is required to estimate separately for RMC old area and Newly merged area as on June 1998. The population growth rate of RMC area has been given in table. It has been observed that since last 100 years, the population of Rajkot City has increased at different growth rates. The growth rate of Rajkot City from 1901 to 1941 has been calculated as very nominal i.e. 0.15 on average annually. After Independence i.e. after 1951, the rate of population growth of Rajkot City has increased tremendously. Based on the above population figure for the past decades, the RMC population ( excluding newly merged area)has been projected utilizing ratio methods, the geometric growth method as well as incremental increase method and graphical method. The growth rate in higher side found as 3.11% raise per annum, medium as 3.05% and lower growth rate as 2.67%. However, Population growth rate of newly merged area found population growth rate as 11.79%. Therefore, combine population growth rate for RMC old area and the merged area calculated. The combined growth rate found as 4.59% for higher


11



side, 4.05 Medium side and 4.00% for lower side estimation. Table 1.1.3 shows population projections for the years 2011and 2021. Table: RMC Population projection Sr.

Year

Population Projection

No

High

Medium

Adopted Population Projection estimate

Low

1

2011

1,570,000

1,484,500

1,490,000

1,484,500

2

2021

2,215,000

2,207,000

2,232,000

2,207,000

Thus total population of the RMC area in the year 2011 is expected to 14.85 millions while for the year 2021 reach to 22 million persons.

Chart: Rajkot City Population Projection

RMC Population Projection 2500000

Population

2000000 1500000 1000000 500000 0 1971

1981

1991

2001

2011

2021

Year Density : The population of Rajkot city is spread over an area of 104.86 sq.kms., with density of 9556 persons /sq.kms. The density in the older part of the city wards like ward no.1 to ward 8 ranges from 14952 to 35653 persons per sq.kms. the lowest density 3131 person per sq.kms. is registered in ward no.7 having the largest area. Ward no.2 has highest density of 35653 per sq.kms.


12



Table 1.1.5: Ward wise Population, Area and Density of Rajkot city Ward 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Total Newly Merged Area ( 21-23) TOTAL •

Area ( sq.kms.) 0.8227 0.7012 1.0900 1.0822 5.0741 1.7588 3.4360 0.9108 1.4714 1.5277 1.8571 2.875 2.9419 4.0682 1.2919 7.1330 18.8416 4.7052 5.7221 1.3905 69.6836 35.1764 104.86

As per 1991Census Population Density 29766 36181 26738 38132 28104 26289 30411 28101 29505 5815 27097 15406 29677 8637 27547 30245 26943 18311 25669 16802 25322 13635 25499 8869 25222 8573 25602 6293 26761 20663 25316 3549 30999 1645 31146 6619 30848 5391 31235 22463 559407 8028 81971 22330 641378

6116

As per 2001 Census Population Density 25000 30388 25000 35653 29000 28431 30000 27721 61000 12022 52000 29566 52000 15134 27000 29644 22000 14952 42000 27492 28000 15077 34000 11826 41000 13937 37000 9095 26000 20076 26000 3645 59000 3131 46000 9776 58000 10136 35000 25171 755000 10835 247000 7022 1002000

Rise/ Fall -ve -ve +ve -ve +ve +ve +ve -ve -ve +ve +ve +ve +ve +ve -ve +ve +ve +ve +ve +ve

9556

Literacy Rate: Literacy level of Rajkot has always been higher than state literacy levels. With a total literacy rate of 73.86% in the year 2001, the

city has comparatively higher literacy rate than 69.96% of State literacy rate as well as 54.16% of National literacy rate. •

Slum Population: Rajkot city has 84 notified slum area having population of about 202371. It is spread in almost all wards. There are total 106574 males & 95769 female including total children of 88865 (30516 children age below 5 yrs.& 58349 children age 6-17 yrs.). It shows sex ratio as 899:1000. The caste structure is found as 33.29% SC, 2.47 % ST, 45.22 OBC (Other Backward Class) & 10.02% general. The literacy rate is observed 63.70%. Out of 44914 household of slum and urban poor, it is found in total survey of all household that (survey carried out by united research organization survey,2002), 32701 HH are living below Poverty line i.e. about 72%. The total population below Poverty line is about 147342 people. Comparing to total population of Rajkot city, which is 1002000 as per census 2001, the BPL population is about 14.7% of city population.

3.8 Land Use Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

13



Rajkot city is characterized by a pattern of multiple land uses. The total area developed for urban activities constitute 77% of the Rajkot Municipal Area. Residential use occupies about half of this area, while industries occupy a fifth and commercial zones occupy less than 2%. Although a

Land Use

Residential Commercial Industrial Traffic & Transportation Public & Semipublic Recreational Space Agriculture Water bodies Vacant Land Other TOTAL

Table: Land use Break Up Existing Land Use Proposed Land Use as as per 2001 per DP 2011 Area in Percent Area in Percent Hectare Hectare 4247 40.50 5502 52.47 209 2.00 279 2.66 628 5.99 738 7.04

development

plan

has

been

prepared, poor implementation and enforcement

result

in

quite

different ground realities. Rajkot is plagued by problems of informal sector including slum development,

1400

13.35

1650

15.74

illegal colonies and commercial

149

1.42

249

2.38

encroachments and a lack of

123 995 236 1510 988 10484

1.17 9.49 2.25 14.40 9.42 100 %

523 800 236 -508 10486

4.99 7.63 2.25 -4.84 100 %

industrial zoning and unplanned mixed land use. The developed

for

total urban

area activities

constitute about 77 % of the city

area and balances constitute activities enmarked for vacant land, water bodies and other purposes. •

Residential Uses: The residential development is spread over 54 sq.kms. high density of

residential development is found in older parts of city especially Kotak street, Raghuvir para, Ramnath para, Kumbhar wada, Soni bazaar etc., The densities are low in the newly merged area especially in and around kalwad road, Raiya road, 150 feet ring road, university road and in some parts of junction area, popat para area etc. It is obvious that newly developed area where TP schemes were developed is planned. However, old city areas like Prahlad plot, Jayraj plot area are developed with a regular street pattern, well shaped plots but these area lack open space. Percentage of residential area to total area is found 51.34% while residential area to developed area is 60.23% . •

Commercial Use: Main commercial areas are Soni bazaar, Dharmendra road, Lakhajiraj road,

area around jubilee vegetable market.etc., of old city, which is also described as city area ‘ A’ in GDCR; Yagnik road, Dhebar road, gondal road, Jagnath area etc., which is known as city area ‘B’ etc.; and Kalwad road, amin road, university road, Raiya road, st.kabir road, pedak road etc, called ‘Other area_ as described in GDCR’. Traditionally, dana pith area was for grains & grocery whole sale and retail marketing; lakhaji raj road, kapad market and dharmendra road for clothing sale; soni bazaar for jewellry market; sadar for retail provisions stores etc., are established since long. These commercial activities demand substantial space in prime areas. The percentage of commercial area to total area is found about 1.89%, while same is to develop area seems to about 2.11%. •

Industrial Use: Two Industrial estates were developed by Gujarat Industrial Development

Corporation. They are Bhaktinagar Industrial Estate and Aji Industrial Estate. Above which ,sorathiawadi Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

14



plot area had been developed by private developers as another industrial area. Besides, National Textile mill, which is closed, occupies very prime land and is spread in huge area. Rajkot city is developed as an industrial city hence, growth of industries and residences of industrial employees developed simultaneously which resulted in mixed land use pattern. The percentage of Industrial area to that of total area and developed area are found 20 % & 22.28% respectively. •

Public Purposed Use:Main components of Pubic purpose use can be described as open space,

parks & play ground, recreational space, hospital space, schools, govt. office buildings etc., The major contribution to the component is by race course complex, which has facility of international cricket stadium, indoor stadium, hockey ground, foot ball ground etc.; garden and fun world & open ground. Other such space is Shastri Maidan. The total public purposed space to total area is 9% while it is 10% against developed area.

3.9 Housing Housing reflects the economy & quality of life of any urban area. Poor planning mechanism leads to slum & illegal growth. Though, there exists an elaborate Regulatory Mechanism to promote, guide & control the building activities, it is often claimed that its procedure are very restrictive and difficult to comply. Such rigidity in regulation mechanism has minimized its scope. Almost 25 to 28 percent addition to the housing stock are estimated to be made informally without obtaining necessary permissions and sanctions. On one side lot of financial agencies and Govt incentives, encourages the development of housing sector where as on other side the regulation mechanism creates complex hurdle to the development. Therefore it is necessary to form housing strategy for better city and reducing slum & illegal development. As described above there are 51.34% land is reserved for Residential purpose. Out of which 80% is being developed. The average house holds size as per census 2001 is 5.64, and the total number of residential property as per RMC tax branch report is 1,65,000 which describes about 40000 yet to be required. It is observed that nearly about 5000 dwelling units are added annually to the housing stock of the city. In contrary to this, the number of applications for development permission received by RMC is as low as sixteen hundred. However, many of these applications are taken for multi-storied building having more than one dwelling unit. On these ground, it is estimated that nearly half of the dwelling unit’s are constructed beyond the framework of regulation framework. The development permission in the Rajkot city is accorded as per the provisions given in General Development Control Regulation (GDCR)- revised May-2000.


15



It is estimated that more than 75% dwelling units out of total

Year

houses constructed for lower income groups, 55% out of total houses

constructed

for

MIG

2001/02 2002/03 2003/04 2004/05

Table: Status of Land Development Developed land Undeveloped and under (hectares) developed land under use (hectare) 7744.843 2740.922 7894.843 2591.157 8052.740 2433.000 8213.795 2272.205

groups and similarly 25% for out of total houses constructed by high-income group housings are constructed without development permission. The incessant process of urbanization and rapid industrialization has increased the population of Rajkot. From 132, 000 in 1951, the population figure rose to 1002000 in 2001 registering a growth rate of about 759 percent in five decades. Though the population has grown by leaps and bounds but the corresponding provision of housing facilities has not kept abreast. Shortage of housing facilities has contributed to the emergence of slums. At present there are 84 (74 recognized + 10 unrecognized) slum localities with an approximately population of 202371 within city Municipal limit. The slums in Rajkot are experiencing a faster growth rate than that of the city in 1972-73. There were only 24 slums, with 4927 nos of households in Rajkot in 1972-73. At present, there are 84 slums with 44914 nos of households. This indicates an increase of 468 per cent in slum population in just thirty years. Since the slum population is 2,02,380 and the present population of Rajkot is about one million, it can be concluded that almost 20 percent of the Rajkot population live in slum areas. Slum Housing: Most of the slum population resides either in pucca or semi-pucca houses. About Table: 4.4 Type of Slum Houses Hutment type Number Percentage Total Temporary( kutcha) 513 1.15 Semi-Permanent 31971 71.18 Permanent 12430 27.67 Total 44914 100

1.15 per cent resides in huts made of kutcha (temporary) materials. Generally a house has one

multi-purpose

room,

kitchen

and

verandah. The roofing material is either local tile or pre-cast slabs. As indicated above,

71.18 per cent of the hutments in the slums in Rajkot are built of semi-permanent or temporary (kutcha) material.

3.10 Civic Authorities The city has 23 election wards and an elected body comprising of 69 members elected at the rate of 3 members per ward having one female member from each ward. The breakup of councilors works out as under: General seats

38

Women councilors

23

Scheduled caste

4*

Backward classes

7*

* Out of 4 schedule caste councilors, one is included in the women's group. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

16



** Out of 7 backward class councilors, two are included in the women's group. The ward-wise population and break up of the elected representatives in terms of female councilors, councilors from reserved category as well as from general category is shown in statement kept at Annexure-A. The elected body is responsible for governing the affairs of the municipal corporation. The City Corporation has a mayor whose term is for a period of two and half years and for the first time in the history of Gujarat State by an amendment in law, the mayor has been brought into the main stream of municipal administration. Unlike many other states in india, the Mayor of Rajkot enjoys certain powers to effectively carry forward the activities of city government. The Municipal Corporation's administration is under the control of Municipal Commissioner. His appointment is made by the State Govt. from time to time. He is assisted by Deputy Municipal Commissioners and a large work force of Municipal officers and servants to discharge the functions of the Corporation. The main functions of the corporation are as under: Water supply Sanitation City cleaning and waste disposal Health Roads Streetlights Fire brigades Parks and gardens Library, etc. Separate department of Drainage is under the administrative control of the City Engineer.

3.11 Status of Legislation Law is the basic instrument that defines rights and obligations. The legal framework is governing a particular infrastructure sector development. ‘ Regulatory Frame work’, means the statutes, rules, regulations and administrative orders governing for various components of city development strategy. Legal and regulatory stipulations lay down a framework of planning and management and also emphasise the government’s commitment to improve quality of life of citizens. Though BPMC Act, TP & UD Act and 74th CAA describes duty, functions and powers for Urban Local Bodies in the state, but it is also necessary to set a set of such a regulatory frame works which can develop state of art for running the show as well as total control and command approach for executing infrastructure of the city In the Gujarat, and particularly for Municipal Corporations there are three legal relevancies are essential to explore urban infrastructure development and financial resource generation. These are_ 1. 74th Constitution Amendment Act ( CAA) 2. Bombay Provincial Municipal Corporation Act,1949 3. Gujarat Town Planning & Urban Development Act, 1976. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

17



Besides there are number of laws, like Food Adulteration Act, Animal cruelty law, the different legislation enacted in India exclusively for environmental protection and conservation are: a. The Air (Prevention and Control of Pollution) Act 1987 b. The Water (Prevention and Control of Pollution) Act 1974 c. The Environment Protection Act 1980 d. The Forest Conservation Act 1980 e. The Wildlife Protection Act 1972 and f.

The Public Liabilities Insurance Act 1991

It may be interesting to note that there are about two hundred laws dealing with environmental protection both before and after Independence India. The 42nd amendment to the constitution enacted in 1974 has two Articles (Art 48-A) and (Art 5-IA (g) - throwing the responsibility on the State government and on every citizen to protect and improve the environment. A study of these laws reveals that a number of provisions are suggestive and advisory. The Indian Penel Code (IPC Section 270) provides a fine of Rupees 200/- for creating public nuisance and health hazard and Rupees 500/- for making atmosphere noxious. Thus adequate Legislations are there but they require proper review for making it more effective. 74th Constitutional Amendment Act 74th Amendment Bill was passed in December 1992. The Bill was ratified by almost all the states with few exceptions. It received the assent of the President in April 1993, and came into force on June 1,1993. However, the Constitution –74th Amendment – Act 1992, provides for a period of one year by way of transition during which time amendments to the existing State Acts have to be carried out so as to bring provisions of the said Amendments Act. Salient Features of 74th Constitution Amendment Act 1992 a. The provisions of the 74th Constitution Amendment Act 1992, being pad of the constitution are applicable to all the States. They are applicable to the union territories also (243-ZB). b. This Act has conferred powers on the President of India to direct, by a public notification, the application of this Act to a part of a union territory also with such exceptions and modifications as he may specify in such notification (243.78 Proviso). The provisions of this 74th Constitution Amendment Act are not applicable to the scheduled areas specified in Art. 244(1) and the tribal areas specified in Art. 244(7) c. Definition of urban areas (243-q (1)) d. Division of municipal area (urban local body) into wards (243-r (1)) e. Composition of each municipal body (243.r (2) f.

Constitution of ward committees (243-s (1)(2))

g. Levy of taxes and fees (243-x)


18



a. The State Legislature is competent to authorize a Municipal Council to levy, collect and appropriate such taxes, duties, tolls and fees in accordance with such procedure and subject to such limits, (243-X (a)) b. The State Legislature is also empowered to assign to Municipal Council such purposes and subject to such conditions and limits. (243X(b)) c. The State Legislature is competent to make provisions to allotment of such grants-in-aid to the Municipality as it may consider necessary, from the Consolidated Fund of the State (243 X(c)). d. Constitution of funds in the municipal financial administration (243-x(d)) e. Functions & Responsibilities of ULB_ Extract of Twelfth Schedule (Article 243 W) of Constitution of India Schedule –XII gives the list of functions & responsibilities to Urban Local Bodies as describe below: 1. Urban Planning including town planning 2. Regulation of land-use and construction of buildings 3. Planning for economic and social development 4. Roads and bridges 5. Water Supply for domestic, industrial and commercial purposes 6. Public Health, Sanitation conservancy and solid waste management 7. Fire services 8. Urban forestry, protection of the environment and promotion of ecological aspects. 9. Safeguarding the interests of weaker sections of society, including the handicapped and mentally retarded 10. Slum improvement and upgradation 11. Urban poverty alleviation 12. Provision of urban amenities and facilities such as forests, gardens, playgrounds 13. Promotion of cultural educational and aesthetic aspects. 14. Burials and burial grounds; cremations, cremation grounds and electric crematoriums. 15. Cattle ponds: prevention of cruelty to animals. 16. Vital statistics including registration of births and deaths, 17. Public amenities including street lighting, parking lots, bus stops and public conveniences Bombay Provincial Municipal Corporation Act, 1949 In Gujarat, Bombay Provincial Municipal Corporation Act, 1949 was enacted for Municipal Corporation of Gujarat. The act was amended as Gujarat Act No.21 of 1989 on 05.09.1989, thereafter, for Municipal Corporations in Gujarat have to function as per the Bombay Provincial Municipal Corporation Act (Gujarat Amendment) Act, 1989. However, till to day the amendment act is popularly described as BPMC Act.The Act contents 33 main Chapters, Four Appendixes, and Four schedules. Chapter –IV about administrative set-up while Chapter-V to VIII, largely describes the powers & Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

19



functions including obligatory & discretionary duties of the Corporation as well powers and mode of contractor and Acquisition of property & disposal of properties. Relevant sections of BPMC: Important section of BPMC Act, 1949 in respect to urban infrastructures facilities, taxes etc., are as given below: Sr. No. 1

Relevant Sec. BPMC Act Sewerage Sec.63 (3) Chapter-VI Sec.153-155 & Sect.161 Chapter-XII Sect.161-XII Sect.157-XII Sec.176-177 Chapter-XII Sec.157(2) Chapter-XII

Sec.168 & 169 Chapter-XII The Schedule (A) – Chapter-IX

Main contents of the section

Essential Service: Matters to be provided for by the Corporation as Obligatory duty Drainage works: Drains to be constructed and kept in repair by the commissioner Adoption by corporation of drains and drainage or sewage Powers for making drains Maintenance of Drains including pumping station Sewage Treatment Plant :Appointment of places for emptying of drains and disposal of sewage Purchasing Sewage Cleaning Machinery: For the purpose of flushing, cleaning and emptying the drains, the commissioner may construct or set up such reservoirs, sluices, engines & other works , as he shall from time to time deem necessary Prohibition : Commissioner may close or limit the use of existing private drains & Vesting & Maintenance of drains for sole use of properties Drains & Drainage works: Describes the ways and means of new drainage network as well public & private bath-room & WC

2

Environment & Slum Up-Gradation Sec.280-284G-XVI Declaration of Clearance area besides re-development area Sec.63/2 Clause for fund allocation of 10% budgeted exp. For the development Chapter-VI of backward area. Sec. 307 -XVIII Overcrowded dwelling Sec.308 - XVIII Unsanitary huts and sheds Gujarat Town Planning & Urban Development Act, 1976 Gujarat Town Planning & Urban Development Act 1976 enacted, which came in to force from 21st June 1976.The act extended to whole of Gujarat. The GTP & UD Act consist of eight chapters and 124 sections. TP Schemes Micro Level Planning tools: Section 40 to section 76 describes various provisions in respect to micro level planning viz., TP scheme largely it contains three parts 1. Draft Scheme 2. Preliminary Stage 3. Final stage It follows following path 1. Preparation of the Final Scheme by T .P. 0. (Section52/3). 2. Declaration of decision of T.P.O. to parties (Section 54).


20



3. Constitution of the Board of Appeal to hear and decide appeals (Section 55/1) 4. Board of Appeal's decision communicated to TPO (Section 62/2). 5. Sanction of the Final Scheme with or without the modifications (Section 65/lb) 6. Final scheme comes into force (Section 65/2) Relevant Section of GTP & UD Act-1976 for Infrastructure Development Table: GTP & UD Act, 1976 relevancy for MC Infrastructure Development Sr. No 1

Relevant Sec. GTP&UD Act,1976 Main contents of the section Sewerage & Storm Water 12(2)(e) Proposals for water supply, drainage, sewage disposal, other public utility amenities and services including supply of electricity and gas 12(2)(n) 23(1)(vi) 40(3)(f) 40(3)(jj)(a)

2.

Finance 23(1)(vi-a) 23(1)(viii) 24(1) 77(1)(b) 77(1)(g) 92

Provisions for preventing or removing pollution of water or air To execute works in connection with supply of water, disposal of sewerage and provision of other services and amenities; Drainage inclusive of sewerage, surface or sub-soil drainage and sewage disposal The allotment of land from the total area for roads, garden/O.S., infrastructure and plots for sale To levy and collect such fees for the execution of works referred above To enter into contracts, agreements or arrangements Local authority functioning in the urban development area to pay contribution to development authority Sums to be spent for the cost of works Amount of the cost of infrastructure provided in the area adjacent to the area Power of authority to borrow money

********


21


Existing Situation

E Syysstteem mO Ovveerrvviieew Exxiissttiinngg S w

4 4.1 General

Prior to implementation of underground sewerage project, the city waste was being collected through surface drainage and was being disposed off in the river Aji which ultimately was meeting at Aji-II reservoir constructed in down stream of Rajkot city on river Aji . However, as per the guidelines of Water Pollution Control Board, it is not permissible to dispose off the untreated sewage in natural courses. Under the circumstances, Rajkot Municipal Corporation started under ground drainage work phase wise programmes is as under_

Sr Phase No 1 Phase-I

2

Phase-II (Part-1)

3

Phase-II (Part-2)

4

Phase-III (Part-1)

5

Phase-III (Part-2)

Table:4.1 Phasing of Sewage City area /coverage

Status of work

Old city area which is admeasuring 69 sq.kms. out of Works are already completed between which 40 sq.kms. had been covered in this phase 1981 to 1994 Old city area which is admeasuring 69 sq.kms. out of Works are proposed to which 20 sq.kms., which is planned carry out during 2006 to 2008 period Old city area which is admeasuring 69 sq.kms. out of Works will be carried which remaining 9 sq.kms., which is yet to be planned out during 2008 to 2010 period Newly merged which is admeasuring 35.86 sq.kms., out Works are proposed to of which 15 sq.kms., which is planned be carried out during 2006 to 2008 period Newly merged which is admeasuring 35.86 sq.kms., out Works will be planned of which 20.86 sq.kms., which is yet to be planned and carried out during 2008 to 2010 period

4.2 Rajkot Underground Drainage work - Phase- I & Phase-II Phase-I & Phase-II Drainage Network : Rajkot Municipal Corporation with the financial assistance from World Bank, an underground sewerage project was implemented costing Rs.40 crores and the said project was commissioned in the year 1994. Subsequently, Rajkot Municipal Corporation had taken up the work of to connect the left out area of with underground drainage system and on completion of Phase-II ( Part-I) 90% of old city area will be covered under underground sewerage system and balance area of old city is proposed to be covered during the year 2008-10. The present sewage of old city is being collected through about 350 Km long collective system with 7 nos. of intermediate pumping stations. The sewage being pumped to the sewage treatment plant for the treatment, the capacity of the plant is 44.5 mld, however, it is inadequate to cater the present quantity of sewage about 64 MLD.

Detail Project Report for Drainage Phase-II & III ( Part-I ) for Rajkot city

22


Existing Situation

In 1980-81, the project was conceived for whole city approximately 60 Sq. Kms. area. However, at that time the development of the city was only in 35 to 40 Sq. kms. & remaining 20 sq. kms. was Greenfield under the circumstances the project was specified in two parts as under : Table : 4.2 Phase-I & Phase-II Zone under Phase-I ( 40 sq. kms. area ) 350 kms 450 kms 7 nos. 22 Sets 44.5 mld capacity

Zone under Phase-II ( 20 sq. kms. area ) 1. Collective System pipe line 55 kms 2. House connecting pipe line 58 kms 3. Civil work for p.s. 4. Pumping Machinery 11 sets 5. Sewerage Treatment 44.5 mld capacity (proposed) 6. Rising mains 900 mm dia ps.pipe 900 mm dia ps.pipe line line 4.16 km 4.16 km 7. Execution cost Rs.40 Cr. 21 Cr (proposed) Thus, Rajkot underground sewerage project costing Rs.40 crores covering area around 40 sq.km of walled city was implemented by Govt. of Gujarat with loan assistance from World Bank during the period 1984 to 1994 in which, following works were executed with the base year 1980-81. 1.

Collective system and house connections 800 kms

2.

Civil work of pumping station.. 7 nos. in city.

3.

Non-clog C.F.pumping sets .. 22 sets

4.

900 mm dia prestressed concrete rising main 3.5 km long.

5.

44.5 mld capacity sewage treatment plant at Madhapar.

The project was conceived with base year 1980-81 with covering area of old city 69 sq.km. but at that time the city was not fully developed and as such in stage-I the only developed area covering 40 sq.km was considered splitting the work of pumping machinery, sewage treatment plant and collective system. The project was prepared by Consultant M/s.Paramount Pollution Control Pvt.Ltd., Baroda. Phase-I & II drainage network is divided into 12 nos. of drainage zones and spread over to 20 wards out of 23 wards. However, in certain wards some pockets will yet remain vacant which will be connected later on.

Sr.No. 1

Table:4.3 Drainage Network (For Old city) –Phase-I & II Description Phase-I Phase-II Collective system pipe line 350 km. 55 km

2

House connection pipe lines

450 km

58 km

3

Main manholes

10,000 Nos

2,500 Nos

4

House connection chambers

1,10,000 Nos

9,518 Nos

5

Drainage connections

1,60,000 Nos

6

Pumping stations


15,000

7

23


Existing Situation

Rajkot Municipal Corporation drainage collective system consisting of 1800 mm dia RCC NP4 Class to as small as 150 mm diameter stoneware. The pipe materials are RCC / prestressed. For house connections, normally stoneware pipes are used with 100 mm diameter chambers. Some parts of house connections are given by using PVC pipes. However, PVC pipes are largely discouraged. House connections are laid about 45 cms to 90 cm below ground level while collective system are laid up to as much as 2 to 6 mt below ground level. Pumping Stations: There are seven pumping station which pumps sewage water of city area to Madhapur Sewage Treatment Plant. The details of pumping stations are as under_ Table:4.4 Details of Pumping Station Name of pumping station

Pedak road

Capacity in cum/h

Nos. Of motor

Stand by

Power requirement in HP.

35

3

1

30

Bedipara

315

3

1

120

Bedinaka

950

3

1

200

Geet gurjari society

100

3

1

40

Gujarat housing board

215

3

1

60

Popatpara small

20

2

1

15

Popatpara main

1200

5

3

600

Total

22

1065

Phase-I & Phase-II existing Sewage Treatment Plant : Sewage treatment plant of 44.5 mld capacity, is located 6 kms away from Rajkot. As per the ongoing project report for ultimate stage requirement the total capacity of plant requires to be kept 90 mld but at the time of implementation the capacity of plant was kept 44.5 mld for Phase-I requirements. The treatment plant is designed to give full treatment to sewage. Principle process adopted for existing STP is extended aeration process. The disposal of treated sewage is for irrigation purpose and discharge in Aji-II reservoir. The details of raw sewage and treated sewage are as follows: Sr No

1 2 3 4 5

Table:4.5 Quality of Sewage before & after treatment Raw Sewage Treated Sewage Strong sewage Normal Desired as Results of during water sewage per standard present treated scarcity period for irrigation sewage from STP Ph 6.5 to 7.5 6.8 to 7.5 5.5 to 9.0 7.8 BOD in ppm 400 200 100 18.20 COD in ppm 1000 630 -100 Total suspended solid in 750 525 200 10 ppm Total dissolved solids in 2000 1000 2100 800 ppm Parameter


24


Existing Situation

The Phase-I scheme was conceived with base year population 80-81 and was implemented during 1984 to 1994. Because of severe water crisis during 1985 to 1988 and excavation in hard rock the progress was slow. Subsequently, the city is developed fast and as on 1999-2000 all most all left out area were developed fully and RMC started the work of Phase-II (Part-I) for approximate in area of 20 sq.km. At first instant, work of collective system and house connection are taken up on hand in 2000-01 and since then most of the city area has been covered under underground sewage system. The total quantity of sewage being generated daily is around 57 to 58 MLD. Under the circumstances, at present, the existing plant is being over loaded and because of which during the current year Rajkot Municipal Corporation has decided to augment the capacity of existing plant by 44.5 mld and capacity of pumping machinery and additional rising main i.e to take up works under Phase-II(Part-I).

4.3 Rajkot Underground Drainage work - Phase- III As stated earlier, in 1998 the city limit of Rajkot was increased by the government and approximately 35.86 sq.kms. area of surrounding was merged ( see Annexure 1.3 ). The main areas are of three urban bodies namely; Nana Mava Raiya and Mavdi. At the time of merger the above areas were without any kind of infrastructure facilities and as such Rajkot Municipal Corporation has given the priority to provide all infrastructural facilities to these areas at the estimated cost of Rs.200 crores approx. For immediate relief to the people residing in this area, at the first instance for scientific disposal of the sullage water the most of the area has been covered under surface drainage. At present, most of the area has been covered under the surface drainage temporarily so that hygiene problem may not arise. Simultaneously a detailed underground drainage project of this area have been conceived in the year 2000-01 through the consultant. For this phase- III there is no any Sewage Treatment Plant and hence it is planned to construct 51 MLD sewage treatment plant in said area.

4.4 Rajkot Water Supply The Rajkot Municipal Corporation (RMC) is making great efforts to provide water supply to the citizens. RMC is drawing water from various sources viz. Bhadar, Aji-I, Nyari-I, Nyari-II, Lalpari & Randarda Lake and from Narmada canal based pipeline. The major sources are Aji-I, Nyari-I, Nyari-II and Bhadar which are described as under: Aji-I with Twine lake of Lalpari & Randarda Water Supply Scheme: This is the scheme for the purpose of water supply was constructed by the then Saurashtra State Government. This is the first water supply scheme serving Rajkot city. After the commissioning of this water supply scheme people were supplied filter water through house connection for the necessary requirement of water. This scheme was commenced in 1955 and still it is working. The availability of water from the said reservoir Detail Project Report for Drainage Phase-II & III ( Part-I ) for Rajkot city

25


Existing Situation

is for 4.5 mgd i.e. 20.43 MLD. Similarly, Rajkot Municipal Corporation is getting about 1.5 mgd i.e. 6.81 MLD from twin lakes of Lalpari and Randarda. Thus, total quantity available at Aji-I head work in normal year 20.43 + 6.81 = 27.24 MLD. Nyari-I Water supply Scheme: Due to strategy and geographic location, Rajkot has attracted so many people from outside, which resulted in higher demand for water supply. Same demand cannot be Sr. No 1 2

Table: 4.6 Sources of water Particulars Aji-1 Nyari-1 Distance form City Dam Details Live storage Dead storage Total Storage MCFT

5 kms.

8 kms.

1007 Mcft. 21 Mcft 1028

945 Mcft. 20 Mcft. 965

NyariII 22 Km

Bhadar 65 kms.

fulfilled

by

reservoir.

Aji Hence

Corporation had decided to construct a dam near

In

450 45 500

7030 Mcft. 45 Mcft. 7075

Rajkot

city

for

water

supply to fulfill required additional water.

demand

of

This is the first

dam owned by Rajkot Municipal Corporation. This scheme commenced in 1975 and the population of the western part of the city is being served through the said scheme. The present availability of water from the reservoir is 4.7 mgd, about 1.0 mgd from seepage. Total 5.7 mgd i.e. 25.90 MLD, Bhadar Water supply Scheme : To provide better sanitary facilities to the public of Rajkot by means of underground drainage Rajkot Municipal Corporation has implemented water supply scheme based on Bhadar reservoir located at 60 kms. away from Rajkot.. This scheme is major scheme for the supply of water to Rajkot city. The scheme was completed within 135 days during the year 1988. The Bhadar reservoir is for irrigation purpose, however, Government of Gujarat has reserved 10 mgd of supply in reservoir for drinking purpose to Rajkot and accordingly every year water is being made available from the said reservoir depending upon the storage available in the reservoir. After implementation of the said scheme the existing Aji and Nyari system was interconnected with Bhadar so that water from one zone to another zone could be transferred. At present, the total availability is 45 MLD. Nyari-II Water Supply Scheme: In 1998 the city limit was extended by the government and because of which water supply demand of newly merged area had increased by 2.5 mgd. And accordingly, the State Government had given the reservation of 1.5 mgd in Nyari-2 reservoir and 1.0 mgd from seepage of Nyari-2 and accordingly to cater the demand of newly merged area namely; Nana Mava, Raiya, and Mavdi, a water supply scheme costing Rs.15 crores was implemented by Rajkot Municipal Corporation based on Nyari-II reservoir. Drinking Water from the Narmada Canal : The Government of Gujarat has planned to implement a water supply scheme based on Narmada reservoir wherein 0.86 MAF quantity has been reserved for drinking purpose for 12 Districts of State Government. The water supply project based on Narmada costing Rs.7000 Crore is under implementation with the State Government. In the above water


26


Existing Situation

supply project, the allocation of water for Rajkot city is 160 MLD which is to be obtained from the Table : 4.7 Zones & Storage Capacity & supply Zone ESR/ GSR Capacity Total water Supply (MLD) from each headwork ( MLD) Aji 38 37 Nyari 30 30 Gurukul 20 21 Jubillee 20 19 150’ ring road 35 33 TOTAL 143 140

section-A

i.e.

Dhodhidhaja

Dwarka

pipeline

project.

However, the said segment of the project is yet to be implemented and as such as a temporary measure Government of Gujarat have planned to supply 75 MLD

of quantity to Rajkot from the section- Maliya Jamnagar. Water from Bhadar , after treating water at Ribda is transmitted to the underground sumps at Gurukul and Jubillee water distribution Stations. At Aji head works, water from available Aji dam, Lalpari & Randarda lake and Narmada pipe line is being filtered at Aji and same is being stored and transmitted to Dudhsagar sub head works, 150’ring road., Mavdi headworks and Jubillee water distribution stations . Water from Nyari-1 dam is being supplied, after treatment at Nyari filter plant to Nyari zone which includes sub zones like sojitranagar ESR etc., Water collected from Nyari-2 dam is treated at Ghanteshwar filter plant and supplied through sub-zones Bajrangwadi. Water. Main pipe lines are of Mild Steel, PS , and AC Pressure line ranges from 900 mm to 450 mm as main. Distribution networks is of AC pressure pipe line with diameter 450 mm to 80 mm. Total length of Transmission line is about 250 kms. The total distribution network length excluding the transmission lines is 1375 kms. Table : 4.8 Water supply Distribution Net works Details Unit Number of Zones 5 Number of Sub zones 11 Mains line length 105 kms. Distribution line length 1350 kms.

A total storage capacity of

202

million liters is available in the form of underground sumps and overhead service reservoirs at various water works and other distribution stations. The storage capacity

adequacy of all the water distribution stations to the total water supply is 144 percent.

Mode of supply : Intermittent 20 minute daily by zoning Rate of Supply : 110 LPCD to 125 LPCD proposed to have 150 LPCD Present total city water supply : 150 MLD *******


27


5

Extent of Privatization

E Exxtteenntt ooff P Prriivvaattiissaattiioonn

5.1 Privatisation experience of RMC The local bodies of our country are facing major problem of lack of financial and human resources to manage the breakneck growth of the cities. Few years back Rajkot was also experiencing the same. It is then that the corporation took some of the timely and bold measures to combat the problems, which have emerged with the wake of urbanisation. The Corporation has now pioneered the art of "Privatisation". NGOs have been involved in the services like Crematorium, Dispensaries, Libraries, Planetarium, Science Centre etc. while the contractors are involved in Parks, Solid Waste Management, Street Lights Maintenance, water supply & under ground drainage treatment plant, Security and Amusement Parks. This has opened new avenues for the corporation to reduce the establishment of expenditure while allowing for better management and quality services. Situation before the initiative

•

Resource constraints obstructed the initiatives of Corporation to solve various problems related to the increasing size and pressures of its growth.

•

The tax structure in Rajkot Municipal Corporation has also remained static over the years coupled with the political problems attached with raising the taxes.

This

resulted in low leverage to augment finances. Strategy adopted

•

Privatisation of high priority services was introduced to supplement the existing service delivery. The experience gained in initiating the private sector involvement and later in managing and supervising the works has helped the Corporation to evolve standard tender documents.

•

Involvement of the private sector demanded larger vigilance and monitoring. It required: 1. Setting the duties of contractor, the rates of work and evaluation procedure. 2. Advertising the tender and hiring the competent contractor. 3. Monitoring activities of contractor. 4. Getting the work done as per contract under the supervision of staff.

Detail Project Report for Drainage Phase- II & III (Part-I) for Rajkot city

28


•


The following services have been privatised till now: A. Solid Waste Management B. Street Lights C. Water Supply and Drainage Pumping Station treatment plants and Pipelines D. Collection of Toll Taxes and Serving of Tax bills E. Security Guards F. Maintenance of Gardens & Entertainment Projects G. Mobile Clinic H. Telephone EPABX and Xerox Service J. Maintenance of Public Toilets K. Drainage Complaint Cell Management

5.2 Operation of Drainage Pumping Stations At present, sewage is conveyed to treatment plant through under ground pipe network with the help of pumping. There are seven pumping stations are located in different area to pump the sewage. Out of seven pumping station, operation and maintenance of six pumping station is given to the private contractor, and remaining is operated through RMC employee. The maintenance of six sewerage pumping station is given under service contract by calling for tenders on yearly basis. In the six pumping station where privatization has been induced, RMC’s liability is reduced to mere payment of electric bill and replacement of major parts. At each pumping station the contractor has to provide one electrician and one helper per shift. Monitoring and regulatory supervision of contractor’s work is carried out by the Assistant engineer and Deputy executive engineer.

Total cost incurred in operating and maintaining the six pumping station is fixed on shift basis. It is estimated that Rs 17.75 lacs per year for the running maintenance and operation cost of 7 pumping station, which means per pumping station per year the average cost comes to 2.54 lacs. We assume that pumping station is operated on an average for two shifts per day. So total average cost per shift per pumping station is comes to Rs. 350 only.

5.3 Privatization of Public Grievance Cell of Drainage Department Recently, RMC has taken further step in involvement of private sector in delivery of urban services. The complain sale of drainage department is privatized by RMC. For ward no. two to eight, Responding and redressal to complain is given to private contractor. As per contract, the contractor has to ensure quick reddressal of complains regarding the drainage services in ward no. two to eight. Detail Project Report for Drainage Phase- II & III (Part-I) for Rajkot city

29



It is observed that total no. of complaint received in ward no. two to eight was 58441 for eight months. Sr. No.

1. 2. 3. 4. 5. 6. 7. 8. 9. 10 11. 12. 13

Table:5.1 No of Complaints Month No. of Complaints

April 05 5320 May 05 4030 June 05 6549 July 05 5141 August 05 4243 September 05 4746 October 05 4268 November 05 4190 December 05 4871 January 06 5038 February 06 4769 March 06 5276 Total 58441 Note: • 10% of complaint is of Main line • 90% of complaint is of House connection chamber. • The cost for Main line complaint is Rs 250 per complain, while for house connection is Rs 25 per complain.

Total expenditure incurred to redressal of the complains was Rs 27.76 lacs for financial year 2005-06. The contractor’s works remain satisfactory. Previously, response and redressing of complain was took four to five days and some time complain never attended. But after the task is assigned to the private contractor, the response and redressing of complain becomes fast. So by privatizing, RMC achieves efficiency in managing complains as well as cost savings.

5.4 Scope for further Privatization Experience of Rajkot Municipal Corporation shows that by privatizing many services cost effectiveness as well as quality of services improved. Sanitation service has also good potentiality to involve private sector. Recently Rajkot Municipal Corporation has successfully privatized the complaint cell and operation and maintenance of drainage pumping station. To further involve private sector, sanitation service can be un bundled in to following sub sector.

1) Issue and collection of bill on service contract base. 2) Operation and maintenance of collection system on management contract base. 3) Construction of collection network on concession base. 4) Construction, operation and maintenance of waste water treatment plant on concession base.


30



A) Issue and collection of bill: Issuing of bills and collection of the billing amount can be privatized on service contract basis. For performing the given task, private contractor will receives the prefix amount. Preference should be given to the reputed well known organization to award contract. Following points should be considered in designing the service contract. •

The contractor has to develop billing and collection system which includes issuing of bills, collection of payments, necessary supervision and development and updating of database.

•

The minimum collection target must be designed based on the past experience.

•

The contractor has to deposit the all collected amount whether cash, cheques or in other form on the same day of receipt.

•

The contractor is liable for any loss of money.

•

Incentive fee should be given to the contractor for the over and above minimum collection target.

•

Penalty clause also designed for the not achieving the minimum target.

•

To evaluate the performance of the contractor, contractor has to submit performance report every month.

•

At the end of contract duration all the updated database must be submitted to RMC.

•

Contract can be terminated at any time if RMC fills that the performance of contractor is not up to the mark.

B) Operation and Maintenance of collection and conveyance system: The operation and maintenance contract should be given on management contract basis. In this form of contract the liability for the capital investment remains with RMC and the repairing and maintenance expense will be born by the contractor. The contract covers all the Operation and Maintenance and necessary repairs including predictive, preventive and corrective maintenance activities for all the assets assigned to the contractor. In this form of contract, the ownership of all the assets remains within the employer. The contract should be awarded under competitive situation. In designing the contract following point should be kept in mind. •

As the operation and maintenance of sanitation service requires skill personnel as well as special equipment, the contractor has to employ qualified personnel and must have required equipment.

•

The contractor shall not make any capital expenditure on the sanitation service.

•

The contractor must submit the monthly maintenance report.

•

The contractor must pay in timely manner to his employees as per minimum labour wages.

•

The contractor has to carry out the necessary repairs within the predefined time as soon as he receives complaints.

•

Failing to repair in stipulated time will be liable for the penalty.


31


•


In case of emergency, the contractor has to carry out the necessary repairing work as directed by the RMC.

•

If RMC fills the working of contractor is unsatisfactory, the contract can be terminated.

C) Construction of collection network and treatment plant for newly merged area: The construction of collection network and waste water treatment plant for newly merged area should be given to the private sector either on concession basis or forming joint venture Company with private sector. If the contract is given on concessionary base, then the total capital investment as well as expenditure for operation and maintenance for the service will be born by the private sector. At the end of contractual period (usually 25 to 30 years) the whole system should be handed over to the RMC. During the contract period all necessary charges should be levied by the contractor.

********


32


6

Civil Designs

D Deettaaiilleedd E Ennggiinneeeerriinngg D Deessiiggnn-- C Ciivviill

6.1 Drainage Phase-II (Part -1) The underground drainage project of Rajkot city costing Rs.36.00 crores was sanctioned by the government and was implemented by GWSSB with the financial assistance of World Bank in the year 1982-83, the said project was framed considering the part of the city area developed at that time. The majority of the peripheral area of the city were not developed and as such these areas were proposed to be considered in Phase-II work and were not incorporated in the cost estimate, however, the detailed design was carried out by GWSSB for the whole area of the city so that as and when needed the remaining area could be connected with drainage project. The execution Phase-I of the project was carried out by GWSSB in the year 1984-85 and was completed in the year 1992-93. The main causes of delay in the work are acute scarcity of water during 1985 to 1988 and excavation in hard rock. The project was commissioned successfully in the year 1994. In Phase-I the following works were completed and commissioned. •

Collective system with house connections almost in 40 sq.km area

•

Civil work for 7 pumping stations

•

providing and erecting pumping machinery suitable for stage-I requirement Total 22 sets

•

900 mm dia PSC rising main from main pumping station to STP through field.

•

44.5 MLD capacity sewerage treatment plant with disposal arrangement with 50% capacity As on date, the said scheme is in working condition and same is under maintenance with

Rajkot Municipal Corporation. So far, Rajkot Municipal Corporation has given about 1,60,000 house connections sewage is being treated in the existing plant at Madhapar. The part of the work of zone-311 was carried out by Rajkot Municipal Corporation from its own fund with the cost of rs.4 crores. Thus, the total expenditure incurred on Phase-I work is around Rs.40 crores and Rajkot Municipal Corporation is making repayment of the loan regularly. As stated above, the original project was framed with the development of the city up to 1980 but subsequent to 1980, all the peripheral areas have been developed fully and are now required to be connected with the existing drainage system, as the system has been designed to cater the whole area of the city. And accordingly, Rajkot Municipal Corporation has taken up the Phase-II (Part-I) work in a phase manner onward 2000 from support of the budget allocation. So far, approximately, works to the tune of Rs.400 lacs has been completed and commissioned. In Phase-II (Phase-I), the following works are yet to be carried out: 1. The work of collective system with house connection in approximately 20 sq.km area 2. Installation of pumping machinery for additional load – 11 sets 3. Extension of existing sewerage treatment plant by 44.5 mld 4. Power connection 5. Compound wall and area development Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

33


Civil Designs

6. Work of Rising Mains The design criteria for collecting system, pumping stations, Treatment Plant in Phase-II (Part-I) and Phase-III ( Part-I) are adopted as per CPHEEO Manual on Sewerage and Sewage Treatment (Second Edition)

6.2 Drainage Phase-II (Part-1) Sewage Treatment Plant of 44.50 MLD First phase sewerage was commissioned in 1994 covering 65 % of old city limits and Second Phase covering remaining 35% of the old city limits is on verge of completion and ready to commission by March 2006. Till 2001 the STP at Madhapar was receiving about 45 mld flows, which was in line with rated capacity of 44.5 mld capacity STP at Madhapar. Now this STP is receiving about 60 mld flow and it is projected that implementation of the network in entire area of old city limits would generate flows of about 89 mld requiring augmentation of existing Sewage Treatment Plant (STP) at Madhapar by 44.5 mls capacity. There exists 6 auxiliary Sewage Pumping Stations (SPSs) and discharging wastewater into gravity sewer leading to Terminal SPS at Madhapar. Hence, construction of STP shall be completed as early as possible. Since RMC has already set up STP at Madhapar, staff is familiar with various aspects of the same and hence salient features of the STP are Madhapar shall be looked into prior to formulating process design of new STP at Raiya. The basic principle followed for the existing Sewage Treatment Plant at Madhapar is facultative lagoons followed by extended aeration system. The areas of concern were ease of operation, maintenance, low energy cost and sustainability of the process with shock loads. Existing Sewage Treatment Plant and Disposal Facilities To cater to the flows from phase I & II sewerage system, a STP of 44.5 mld has been set up at Madhapar. The plant is functional since 1994. It is based on facultative lagoons and total power consumption is of the order of 600 HP. Sewage is admitted to inlet chamber and screened prior to undergoing physical treatment. Grit Chamber removes the heavy grit particles and then sewage is admitted to facultative lagoons. Here, the sewage undergoes biological treatment by facultative and micro-aerophil bacteria for 1.5 days. Then sewage is admitted to extended aeration tank, wherein, it is aerated for suspended growth aerobic treatment. Clarifiers have been constructed to settle biological solids and to achieve desired effluent standards. Sludge is being returned to aeration tank to maintain Mixed Liquor Suspended Solids (MLSS) concentration above 2000 mg/l. Proposed Sewage Treatment Plant It is proposed to construct 44.5MLD capacity STP at Madhapur just near to existing plant. The process design of the plant is adopted conventional activated sludge process.


34


Civil Designs

Design Criteria for STP The design characteristics for the Madhapur STP arrived at on basis of the statistical analysis of the result of the inlet concentration (samples collected and analysed by RMC) at Madhapar STP over last eight months. The data is annexed as Annexure: It was decided to adopt BOD value of 200 mg/l and SS concentration of 525 mg/l for the design purpose in earlier report, which fairly matches with the data available. Following design parameters are adopted for the design of STP. Raw sewage characteristics Parameter

Value for Design purpose

pH value

Unit

6.8-9.1

SS

525 mg/l

COD

630 mg/l

BOD

200 mg/l

Alkalinity

185 mg/l

Sulphates

110 mg/l

Phosphates

10 mg/l

Total Kjeldah Nitrogen

16.8 mg/l

Ammonical Nitrogen

15 mg/l

Organic Content in grit

4 mg/l

O&G

15 mg/l

Treated sewage characteristics

Parameter

Value for Design purpose

Unit

pH value

6-9

SS

< 100

mg/l

COD

< 100

mg/l

BOD

< 30

mg/l

O&G

< 10

mg/l

* Pre-1995 discharge norms prescribed 30 mg/l SS and 20 mg/l BOD value, which was duly revised as above.

Observation on raw sewage characteristics RMC has awarded O & M contract to private operator and a procedure has been established to collect data on various parameters of raw sewage for last year. Data for the months of February through September are taken in to consideration. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

35


Civil Designs

From the analysis, it is observed that the concentration of Suspended Solids (SS) is very high during morning hours. Data recorded for morning session 0830 to 0930 indicates SS concentration as high as 2000 mg/l. This is peculiar situation in semi-urban area experiencing scarcity of water, wherein major water intensive activities are at halt during evening and late night hours leading to deposition of solids in to sewers. These get re-suspended during peak flow, which takes place in morning session. Volume of solids to be handled would be enormously high and special attention must be given to this aspect, particularly sludge storage/sump and handling equipment like pump sets and/or classifier mechanism. However, this is not accompanied by steep rise in BOD values. Hence, shock load will not have significant effect on aerator (oxygenation equipment). But sludge production would vary on hourly basis and hence retention time of the sludge sump would be decided accordingly. Analysis of various treatment processes Numbers of processes are in vogue for treatment of domestic sewage (municipal wastewater). This ranges from physico-chemical process to direct oxidation process (zimpro process) for treatment of wastewater. However, physico-chemical processes are generally used for small capacity plants, in particular, industrial plants. Physical process followed by biological process and purely biological processes are more popularly used world over. Each system has its’ own cutting edge features for selection of particular process for some region and respective time context. Physical process followed by biological process and purely biological process are predominantly used in India and Gujarat region. Best examples for STPs based on physical process followed by biological process are conventional activated sludge process (suspended growth), trickling filter (attached growth), and anaerobic lagoons followed by facultative lagoons etc.. Best examples for biological processes are facultative lagoons followed by extended aeration lagoons, Upflow Anaerobic Sludge Blanket (UASB) followed by polishing lagoons etc. Selection of best process suitable for sewage generated in Rajkot would be governed by number of factors. However, attributes for selecting suitable treatment process will decide the treatment steps. Major attributes are enlisted hereunder. 1.

Ease of construction

2.

Simplicity of system requiring less equipment

3.

Ease of operation and maintenance

4.

Availability of spare parts for trouble free O & M

5.

Reliability of process: i.

well established design criteria

ii. proven process parameters iii. established kinetics


36


Civil Designs

iv. amenable to control v. ability to absorb shock loads 6.

Need of skilled/ unskilled staff

7.

Nuisance potential from mosquitoes/ fly/ odour

8.

Ease of access to components of the system for repairs and maintenance

9.

Safety of operating/ maintenance personnel

Apart from above factors, raw sewage characteristics also play an important role. Availability of skilled personnel and spare parts will play major role while selecting the process. Amongst selected processes, its’ Capex and Opex, capitalized cost and financial sensitivity will govern the finally selected process.

In view of above aspects, following processes have been evaluated. 1)

Conventional Activated Sludge Process (with & without power generation)

2)

Facultative Lagoons followed by Extended Aeration (with & without power generation)

3)

Anaerobic Lagoons followed by facultative lagoons

4)

UASB (with & without power generation)

Each alternative is analysed with its’ capital cost (Capex), operation & maintenance cost (Opex), energy charges, resource recovery (power generation), financial sensitivity (capitalized cost with different IRR). Subsequent chapters address the design of each unit of the STP and above factors. Operation of STP depends upon so many factors. But introduction of advanced tools like PLC/ microcontroller/ micro-processor based process control systems would enhance control over process and also achieve the energy saving. Developed countries have fully automated plants and unit operations, which has got very high O & M cost. Hence, emphasis has been made to introduce modern tools suitable for Indian condition. Few of the areas of automation suggested are: Aerator operation: DO levels in the tank shall be maintained at 2 mg/l. during lean flow period, if it exceeds, number of aerators to be stopped on rotation basis could be introduced. Also diminished level of DO would give alarm for attention of the aeration unit. Pumping operation: Level based sensor to start/off the pumps on rotation basis.

Flow measurement: Flow entering into each battery depends upon the sizing of the gates, as built levels etc. Even though, the gate opening is proper, flow distribution is likely to vary. Hence, to measure the flow entering to each unit is crucial information to decide the performance of the same and rectification thereof for process control.


37


Civil Designs

A) Conventional Activated Sludge Process (Casp) This process is based on suspended growth system. Raw sewage is admitted to the inlet chamber for further processing for removal of large particles. Floating matter are trapped in the screen and removed with help of rack mechanism and put to conveyor belt for disposal through collection vehicle. Grit is removed in grit chamber and then sewage is admitted to Primary Clarifier for physical settling process. After primary settling, sewage undergoes biological process wherein biomass is activated to consume the BOD and biodegradable matter is converted to carbon dioxide and water vapor with help of aerobic bacteria. Level of dissolved oxygen and mixed liquor suspended solids are maintained with help of return sludge from secondary clarifier. Food to microbe ratio, substrate, mean cell resident time, decay rate of bacteria to enhance growth of aerobic biomass is maintained apart from aeration. After aeration, biomass attains saturation level of activity and then admitted to secondary clarifier for settling of biomass and accumulation of sufficient quantity of return sludge to help activation of biomass in aeration tank. Sludge produced is returned and wasted through raw sludge pump house or digester, wherein biomass is digested anaerobic ally and sludge concentration is increased from 1-2 % to 6-8%. Supernatant is returned back to PST for treatment. Sludge from digester is taken to centrifuge or filter press or sludge drying beds prior to final disposal and utilization as manure. Filtrate from drying beds/filter press/centrifuge would be returned to PST for further treatment. Bio-gas generated in digester could be taken to Gas Holder and utilized for power generation or flared. Description of functional requirement of each unit for CASP is discussed in brief.

1)

Inlet Chamber

2)

Screen Chamber

3)

Detritor

4)

Parshall Flume

5)

Primary Clarifier (PC)/Primary Settling Tank (PST)

6)

Aeration Tank

7)

Secondary Clarifier (SC)/Secondary Settling Tank (PST)

8)

Raw sludge pump house

9)

Return sludge pump house

10)

Filtrate pump house

11)

Sludge digester

12)

Gas holder

13)

Sludge drying beds/ filter press/ centrifuge

14)

Dual-Fuel gas engines/ gas flaring system

First three units are considered to be Preliminary Treatment Units. 4th, 5th and 6th are secondary treatment units and remaining are supporting units for MWwTPs. Though all the units are Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

38


Civil Designs

designed to handle peak flows and other loadings, sludge digesters need to be designed for sufficient solids loading for effective functioning in the view of the high concentration of SS. 1.

INLET CHAMBER : An Inlet Chamber is provided as receiving unit to STP with special

arrangements. In case of normal operations, the sewage will be diverted to STP and in case of eventuality/ repair/ maintenance, a bypass arrangement is provided for discharge of sewage into receiving body. 2.

SCREEN CHAMBER : Screening is an essential step in treatment of sewage to facilitate

removal of large size floating materials like rags, plastics, tobacco pouches, wooden pieces etc. which otherwise would damage pumps and interfere with the performance of the subsequent units. This consists of bars placed parallel in vertical or inclined system across the flow to trap the floating material. Generally 20 mm spacing is considered to be adequate for STPs. However, considering the problem of pouches of tobacco passing thru’ it parallel to flow, finere screens with spacing of 12 mm followed in mesh pattern are in vogue. 50 mm x 10 mm thick flats are considered to be standard practice in India. Timer based racking mechanism cleans the screen periodically and put the screenings to belt conveyor system. Material is conveyed to collection van provided beneath the end of the belt conveyor for final disposal. CI Gates upstream and downstream to the screen are provided to control flow.

3.

DETRITOR :Detritus Tank popularly known as detritor is provided after screen to remove

heavy inorganic fraction of the sewage prior to physical and biological process. Difference in settling velocities between organic and organic content due to specific gravity is the basic principle followed to design the unit. Grit consists coarse sand particles, ash, clinker, egg shells and silt coated by organic matter (generally marginalized group use silt/ash for washing of utensils) etc. Grit is considered to be non-putrescible possessing higher hydraulic subsidence value than organic matter. Grit removal, if not done, causes abnormal wear and tear to mechanical parts, scrappers/ pumps/ aerators etc. With proper hydraulic design, grit can be effectively removed from the sewage. To prevent loss of useful organic content and to prevent emanation of highly malodorous emissions from the removed grit, grit classifier based on reciprocating mechanism is provided.

4.

PRIMARY CLARIFIER (PC)/PRIMARY SETTLING TANK (PST) :PST removes organic

matter (SS), scum and reduce BOD in quiescent condition. Brownian motion and settling characteristics of solids supported by proper overflow rate and weir loading rate enhances settlement of solids. It also settles BOD (integral part of SS) and hence reduces BOD load on subsequent units. Reduction in BOD load will have great effect on power consumption. Plastics escaped from the screen and grit chamber would float on surface and can be removed by scum arm provided at top. Various functional parts like inlet, baffle, scrapper, outlet weir, sludge removal, telescopic valve, scum box are major components of the PST.


39


5.

Civil Designs

AERATION TANK : Microbes present in sewage can consume substrate (biodegradable

organic matter) if favorable pH value and oxygen is available for faster consumption of organic matter. This unit is heart of the process. Various parameters are controlled to maximize efficiency. Food to microbe ratio, power level, MLSS, means cell residence time, decay rate, volumetric loading, organic loading etc. Washout of microbes must be avoided. It is desirable to maintain DO level at 2 mg/l, which may diminish to 0.5 mg/l as an alarming level. Growth of filamentous bacteria and Nocardia must be avoided and controlled. Sufficient HRT shall be maintained to prevent washout. Entire biomass gets activated in this system by means of suspended growth. Microbes can move to any place within reactor to get food and balance struck between microbes and substrate facilitates conversion of organic matter into active biomass. 6.

SECONDARY CLARIFIER (SC)/SECONDARY SETTLING TANK (SST) :SST permits activated

biomass to settle in form of sludge and sludge settled is pumped back to aeration tank to maintain MLSS. Due to highly active biomass, lumps of biomass are formed and higher ratio of volume to surface area enhances the settlement. Now, major portion of organic content is converted into biomass, which is settled as sludge. Supernatant comprise very low BOD and SS and other parameters. In case the treated sewage is to be discharged into natural water body, the parameters comply with the norms prescribed by pollution control board. However, in case treated sewage is to be reused for some purpose like gardening, recreational activities, tertiary treatment shall be given. 7.

RAW SLUDGE PUMP HOUSE :Raw sludge accumulated in PST is generally put to SDB or

sludge digester. Considering low volumes, this is very small units and used as control room for PTU. 8.

RETURN SLUDGE PUMP HOUSE :Performance of aeration tank depends upon effective

function of this pump house. Generally return flow varies from 25 % to 50 % depending upon concentration of sludge. Considering its’ functional importance, 100% standby pump sets are provided in this unit. 9.

FILTRATE PUMP HOUSE : Filtrate from sludge drying bed/filter press/centrifuge contains

high BOD and SS and hence prior to disposal into natural water body, it shall be treated. Filtrate pump house pumps back filtrate to the inlet chamber of PST and hence only treated sewage is discharged from the STP. Though quantity of filtrate is very low in terms of percentage, overall quantum is in terms of few thousand liters and hence it must be treated prior to discharge. 10.

SLUDGE DRYING BEDS/ FILTER PRESS/ CENTRIFUGE : Digested or raw sludge is dewatered

and converted to utilizable form of sludge cake for manure. Sludge drying bed is most common form of concentrating the sludge and it is most common practice in India. 11.

SLUDGE DIGESTER : Digestion of sludge is achieved in this unit to break the long chains and

convert it to simple form ready to use as manure for improved absorbance as nutrient and reduce the harmful effects on environment. Initially, design of digester with mechanical mixing of sludge posed serious problems of civil structure and blasting. This has been overcome with help of gas mixing Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

40


Civil Designs

system, being used in India for more than 10 years with satisfactory performance. Sludge volume also reduces in this system and area required for sludge reduces to a great extent. 12.

GAS HOLDER :Gas produced in digester is collected here for further utilization like power

generation with uniform feeding to Dual-Fuel Engines or flaring. 13.

DUAL-FUEL GAS ENGINES/ GAS FLARING SYSTEM : Gas produced in the digester is

enriched with methane and high calorific value. Dual fuel engines capable of using gas (80-90%) and diesel (20-10%) can yield power sufficient to run more than half of the operations of the STP. Though it is very attractive, STPs initially set up with an objective to have captive power generation either in CASP or UASB has not been successful on large scale. Above steps briefly describes preliminary aspects of various process units. Sufficient details are discussed about basic principles and area of attention for successful performance of the STP based on CASP. There are many more forms of the CASP like continuous flow (as described above), plug flow, Sequential Batch Reactor etc., but this is most common form easy to maintain and operable and adopted in India. This process is having following advantages 1)

Rajkot is commercial capital Saurashtra region attracting number of skilled personnel and hence availability of skilled labor/ personnel is not a problem for this process

2)

Availability of spare parts is also not a problem since all the equipments like scrapper, aerator are already installed in existing STP and RMC officials are familiar with the equipment and are easily available

3)

Process is having high level of reliability, well established reaction kinetics, amenability to control, can absorb shock loads.

4)

Less potential of nuisance from mosquitoes/ fly/ odour

5)

Easy access to components of the system for repairs and maintenance

6)

More safety of operating/ maintenance personnel

7)

Since the process is proven world wide, construction techniques are known and hence easy to construct (the word conventional itself suggests its’ large scale acceptability)

8)

Easy to maintain the process parameters

9)

Area requirement is very low amongst all 4 processes under consideration. Hence, future expansion is possible, particularly in urban area like Rajkot –where land is scarce.

Disadvantages of the process are: 1)

Sludge digesters pose operational problems due to moving mechanical parts- some of the municipal authorities had overcome this problem by using non-moving mechanical mixers. E.g. Vadodara, Delhi


41


2)

Civil Designs

Skilled personnel (biologist) are required to maintain process parameters like MLSS, BOD, COD, SS etc. Unit Sizing: Conventional Activated Sludge Process All dimensions are in m unless otherwise specified

Sr.

Name of Process Unit

Size of the unit

Power

rqnt

(W+SB) HP 1

Preliminary Treatment Units Inlet Chamber

1 No., 6.5 x 4.5 x 3.3

-

Screen Chamber

2 Nos., 11 x 1.5 x 1.5

6+6

Grit Chamber

3 Nos., 8 x 8 x 1.1

6+3

Parshall Flume

1200 mm throat As per Int.

2

Primary Clarifier

2 Nos., 32.5 dia 3.85 ht

6+0

3

Aeration Tank

2 Nos., 36 x 72 x 4.15

400+0

4

Secondary Clarifier

2 Nos., 37 dia 3.5 ht

3+3

5

Raw Sludge Pump House

1 No., 4.5 dia, 6 m ht

15+15

6

Return Sludge Pump House

1 No., 17.5 dia, 6 m ht

60+(30+30)

7

Filtrate Pump House

1 No., 3.5 dia, 5 m ht

5+5

8

Sludge Drying Beds

28 Nos., 20 x 20 without digester,

10

Nos.

with

digester 9

Sludge Digester

2 No., 24 dia, 11 ht

50+50

10

Gas Holder

2 Nos., 20 dia, 6 ht.

6+0

11

Power Generator

18 x 12 x 6

-405

B) Facultative Lagoons followed by Extended Aeration (FLEA) : This process is based on suspended growth system. Raw sewage is admitted to the inlet chamber for further processing for removal of large particles. Floating matter are trapped in the screen and removed with help of rack mechanism and put to conveyor belt for disposal through collection vehicle. Grit is removed in grit chamber and then sewage is admitted to facultative lagoon for biological process. Here biomass is supplied with limited quantity of oxygen to support facultative microbes, which can survive at lower DO level. After facultative treatment, sewage undergoes aerobic biological process wherein biomass is activated to consume the BOD and biodegradable matter is converted to carbon dioxide and water vapor with help of aerobic bacteria. Level of dissolved oxygen and mixed liquor suspended solids are maintained with help of return sludge from settling lagoon. Food to microbe ratio, substrate, mean cell resident time, decay rate of bacteria to enhance growth of aerobic biomass


42


Civil Designs

is maintained apart from aeration. After extended aeration, biomass attains saturation level of activity and then admitted to settling lagoon for settling of biomass and accumulation of sufficient quantity of return sludge to help activation of biomass in extended aeration tank. Sludge produced is returned to extended aeration tank or put through sludge digester and/or directly to sludge drying beds/filter press/centrifuge, wherein biomass is dried and sludge concentration is increased. Filtrate from drying beds/filter press/centrifuge would be returned to facultative lagoon for further treatment. Description of functional requirement of each unit for FLEA is discussed in brief. 1)

Inlet Chamber

2)

Screen Chamber

3)

Detritor

4)

Parshall Flume

5)

Facultative Lagoons (FL)

6)

Aerobic Lagoon (AL)

7)

Secondary Clarifier (SC)/Secondary Settling Tank (PST)/ Settling Lagoon

8)

Return sludge pump house

9)

Filtrate pump house

10)

Sludge digester

11)

Gas holder

12)


13)


First three units are considered to be Preliminary Treatment Units. 4th, 5th and 6th are secondary treatment units and remaining are supporting units for MWwTPs. 1.



SCREEN CHAMBER :Screening is an essential step in treatment of sewage to facilitate

removal of large size floating materials like rags, plastics, tobacco pouches, wooden pieces etc. which otherwise would damage pumps and interfere with the performance of the subsequent units. This consists of bars placed parallel in vertical or inclined system across the flow to trap the floating material. Generally 20 mm spacing is considered to be adequate for STPs. However, considering the problem of pouches of tobacco passing thru’ it parallel to flow, finere screens with spacing of 12 mm followed in mesh pattern are in vogue. 50 mm x 10 mm thick flats are considered to be standard practice in India. Timer based racking mechanism cleans the screen periodically and put the screenings to belt conveyor system. Material is conveyed to collection van provided beneath the end of the belt conveyor for final disposal. CI Gates upstream and downstream to the screen are provided to control flow. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

43


3.

Civil Designs

DETRITOR : Detritus Tank popularly known as detritor is provided after screen to remove

heavy inorganic fraction of the sewage prior to physical and biological process. Difference in settling velocities between organic and organic content due to specific gravity is the basic principle followed to design the unit. Grit consists coarse sand particles, ash, clinker, egg shells and silt coated by organic matter (generally marginalized group use silt/ash for washing of utensils) etc. Grit is considered to be non-putrescible possessing higher hydraulic subsidence value than organic matter. Grit removal, if not done, causes abnormal wear and tear to mechanical parts, scrappers/ pumps/ aerators etc. With proper hydraulic design, grit can be effectively removed from the sewage. To prevent loss of useful organic content and to prevent emanation of highly malodorous emissions from the removed grit, grit classifier based on reciprocating mechanism is provided. 4.

FACULTATIVE LAGOON : Sewage traveling long distances generally turns septic while

entering into STP and presence of anaerobic and facultative bacteria dominates the system. Conversion of this condition to aerobic condition is power intensive and hence concept of developing facultative culture for biological process of sewage was conceived. Here low level of DO is maintained and thus odor emanation is eliminated. Generally HRT ranges from 1 to 3 days and STPs in Mumbai are set up on this principle. Then sewage undergoes further treatment in aerobic lagoons. 5.

AEROBIC LAGOON : After facultative process, microbes can survive aerobic condition and

are activated to consume maximum substrate. Aerobic bacteria dominate the system. Power level is almost double as compared to facultative one. Sludge from settling tank is returned to this lagoon to maintain MLSS. Generally mixing requirement governs the design rather than oxygen demand as in case of CASP since HRT is comparatively very high. Here the biomass enters into phase of endogenous respiration minimizing sludge production. Maintaining of MLSS and MLVSS is important for better performance. 6.

SETTLING TANK/ LAGOON : SST/SL permits activated biomass to settle in form of sludge

and sludge settled is pumped back to aeration tank to maintain MLSS. Due to highly active biomass, lumps of biomass are formed and higher ratio of volume to surface area enhances the settlement. Now, major portion of organic content is converted into biomass, which is settled as sludge. Supernatant comprise very low BOD and SS and other parameters. In case the treated sewage is to be discharged into natural water body, the parameters comply with the norms prescribed by pollution control board. However, in case treated sewage is to be reused for some purpose like gardening, recreational activities, tertiary treatment shall be given.

7.

RETURN SLUDGE PUMP HOUSE : Performance of aeration tank depends upon effective

function of this pump house. Generally return flow varies from 25 % to 50 % depending upon


44


Civil Designs

concentration of sludge. Considering its’ functional importance, 100% standby pump sets are provided in this unit. 8.




high BOD and SS and hence prior to disposal into natural water body, it shall be treated. Filtrate pump house pumps back filtrate to the inlet chamber of PST and hence only treated sewage is discharged from the STP. Though quantity of filtrate is very low in terms of percentage, overall quantum is in terms of few thousand liters and hence it must be treated prior to discharge. 10.

SLUDGE DIGESTER : Digestion of sludge is achieved in this unit to break the long chains and

convert it to simple form ready to use as manure for improved absorbance as nutrient and reduce the harmful effects on environment. Initially, design of digester with mechanical mixing of sludge posed serious problems of civil structure and blasting. This has been overcome with help of gas mixing system, being used in India for more than 10 years with satisfactory performance. Sludge volume also reduces in this system and area required for sludge reduces to a great extent. 11.

GAS HOLDER :Gas produced in digester is collected here for further utilization like power


DUAL-FUEL GAS ENGINES/ GAS FLARING SYSTEM :Gas produced in the digester is

enriched with methane and high calorific value. Dual fuel engines capable of using gas (80-90%) and diesel (20-10%) can yield power sufficient to run more than half of the operations of the STP. Though it is very attractive, STPs initially set up with an objective to have captive power generation either in CASP or UASB has not been successful on large scale. Above steps briefly describes preliminary aspects of various process units. Sufficient details are discussed about basic principles and area of attention for successful performance of the STP based on FLEA. There are many more forms of the FLEA like without return sludge, only facultative lagoons followed by maturation pond etc., but this is most common form easy to maintain and operable and adopted in India. STP at Madhapar, Rajkot is also based on this process. This process is having following advantages 1)

Availability of spare parts is not a problem since all the equipments like scrapper, aerator are already installed in existing STP and RMC officials are familiar with the equipment and are easily available

2)


3)

Marginal potential of nuisance from mosquitoes/ fly/ odour


45


4)

Civil Designs

Since the process is proven world wide, construction techniques are known and hence easy to construct (STPs based on this process are established at cities like Ahmedabad, Mumbai etc. indicating its’ large scale acceptability)

5)



Sludge removal pose operational problems due to lower level and large area to be covered for de-silting. Chances to damage to membrane are more during operation of sludge removal.

2)

Difficult access to components for repair and maintenance

3)

Skilled personnel (biologist) are required to maintain process parameters like MLSS, BOD, COD, SS etc.

4)

Less safety of operating/ maintenance personnel in case defects in aerators are to be rectified

5)

Area requirement is very large as compared to CASP and restricts future expansion

6)

Power consumption is very high and production potential is low. Unit Sizing: Facultative Lagoons followed by Extended Aeration All dimensions are in m unless otherwise specified Sr.


Size of the unit

Power rqnt (W+SB) HP

1

2

3

Preliminary Treatment Units Inlet Chamber

1 No., 6.5 x 4.5 x 3.3

-

Screen Chamber

2 Nos., 11 x 1.5 x 1.5

6+6

Grit Chamber

3 Nos., 8 x 8 x 1.1

6+3

Parshall Flume

1200 mm throat As per Int.

Facultative Lagoons

2 Nos., 78 x 152 at top

240+0,

54 x 140 at both, 6 m

Nos., 15 HP

2 Nos., 78 x 50 at top

300+0, 6 Nos.,

Aerated Lagoon

58 x 50 at bot, 5 m 4

Settling Lagoon

2 Nos., 78 x 31 at top

16

50 HP -

52 x 18 at bot, 6.5 m 5

Return Sludge Pump House

1 No., 17.5 dia, 6 m ht

50+50+(50 SB)

6

Filtrate Pump House

1 No., 3.5 dia, 5 m ht

7.5+7.5

7

Sludge Drying Beds

28 Nos., 20 x 20 without digester,

10

Nos.

with

digester 8

Sludge Digester

2 No., 24 dia, 11 ht

50+50

9

Gas Holder

2 Nos., 20 dia, 6 ht.

6+0

10

Power Generator

18 x 12 x 6

-175


46


Civil Designs

C) Anaerobic Lagoon followed by Aerated Lagoon (ANAL) : This process is based on suspended growth system. Raw sewage is admitted to the inlet chamber for further processing for removal of large particles. Floating matter are trapped in the screen and removed with help of rack mechanism and put to conveyor belt for disposal through collection vehicle. Grit is removed in grit chamber and then sewage is admitted to anaerobic lagoon for physical settling and anaerobic treatment of sewage (biological process). BOD & SS reduces considerably to reduce oxygen demand in subsequent process train. Hydrogen Sulfide and methane generated at bottom level during the anaerobic process gets dissolved in upper layer reducing odor nuisance. After anaerobic process, sewage undergoes aerobic process wherein biomass is supplied with sufficient quantity of oxygen to support aerobic and facultative microbes, which can survive at medium/ lower DO level. Biodegradable matter is converted to carbon dioxide and water vapor with help of aerobic bacteria. Level of dissolved oxygen is maintained with help of aerators. Food to microbe ratio, substrate, mean cell resident time, decay rate of bacteria to enhance growth of aerobic biomass are maintained apart from aeration. After extended aeration, biomass attains saturation level of activity and then admitted to clarifier for settling of biomass. Sludge produced is in form of biological solids, which would enter into phase of endogenous respiration reducing quantity of sludge to a great extent. Depth of settling lagoon is maintained in such a way that cleaning of lagoon would be required at an interval of 10 years. Description of functional requirement of each unit for ANAL is discussed in brief. 1)

Inlet Chamber

2)

Screen Chamber

3)

Detritor

4)

Parshall Flume

5)

Anaerobic Lagoons (AN)

6)

Aerobic Lagoon (AL)

7)

Settling Lagoon

First three units are considered to be Preliminary Treatment Units. 4th, 5th and 6th are secondary treatment units and remaining are supporting units for MWwTPs. 1.




removal of large size floating materials like rags, plastics, tobacco pouches, wooden pieces etc. which otherwise would damage pumps and interfere with the performance of the subsequent units. This consists of bars placed parallel in vertical or inclined system across the flow to trap the floating material. Generally 20 mm spacing is considered to be adequate for STPs. However, considering the Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

47


Civil Designs

problem of pouches of tobacco passing thru’ it parallel to flow, finere screens with spacing of 12 mm followed in mesh pattern are in vogue. 50 mm x 10 mm thick flats are considered to be standard practice in India. Timer based racking mechanism cleans the screen periodically and put the screenings to belt conveyor system. Material is conveyed to collection van provided beneath the end of the belt conveyor for final disposal. CI Gates upstream and downstream to the screen are provided to control flow. 3.



ANAEROBIC LAGOON : Sewage traveling long distances generally turns septic while entering

into STP and presence of anaerobic and facultative bacteria dominates the system. Conversion of this condition to aerobic condition is power intensive and hence concept of utilizing anaerobic culture for biological process of sewage was conceived. Here absence of DO is maintained by deep lagoons. Odor emanation could be eliminated since uppermost layer acts as a solvent to gases escaping from the system. Generally HRT ranges from 1 to 1.5 days and STPs in Ahmedabad are set up on this principle. Then sewage undergoes further treatment in aerobic lagoons. 5.

AEROBIC LAGOON : After anaerobic process, microbes can survive facultative and aerobic

condition and are activated to consume maximum substrate. Aerobic bacteria dominates the system. Generally mixing requirement governs the design rather than oxygen demand as in case of CASP since HRT is very high comparatively. 6.

SETTLING TANK/ LAGOON : SST/SL permits activated biomass to settle in form of sludge.

Due to highly active biomass, lumps of biomass are formed and higher ratio of volume to surface area enhances the settlement. Now, major portion of organic content is converted into biomass, which is settled as sludge. Here the biomass enters into phase of endogenous respiration minimizing sludge production. Supernatant comprise very low BOD and SS and other parameters. In case the treated sewage is to be discharged into natural water body, the parameters comply with the norms prescribed by pollution control board. However, in case treated sewage is to be reused for some purpose like gardening, recreational activities, tertiary treatment shall be given.


48


Civil Designs

Above steps briefly describes preliminary aspects of various process units. Sufficient details are discussed about basic principles and area of attention for successful performance of the STP based on ANAL. There are many more forms of the ANAL like return sludge from settling lagoon, microaerofoil based system etc., but this is most common form easy to maintain and operable and adopted in India. This process is having following advantages 1)

Availability of spare parts is not a problem since all the equipments like scrapper, aerator are already installed in existing STP and RMC officials are familiar with the equipment and are easily available

2)


3)

Marginal potential of nuisance from mosquitoes/ fly/ odour

4)

Since the process is proven world wide, construction techniques are known and hence easy to construct (STPs based on this process are established at Ahmedabad indicating its’ large scale acceptability)

5)


6)

Power consumption is low as compared to FLEA.


Sludge removal pose operational problems due to lower level and large area to be covered for de-silting. Chances to damage to membrane are more during operation of sludge removal.

2)


3)

Less safety of operating/ maintenance personnel in case defects in aerators are to be rectified

4)


5)

Power consumption is moderate and there is no potential for production of power. Unit Sizing: Anaerobic Lagoons followed by Aerated Lagoon

All dimensions are in m unless otherwise specified Sr. 1


2

Preliminary Treatment Units Inlet Chamber Screen Chamber Grit Chamber Parshall Flume Anaerobic Lagoons

3

Aerated Lagoon

4

Settling Lagoon

Size of the unit

1 No., 6.5 x 4.5 x 3.3 2 Nos., 11 x 1.5 x 1.5 3 Nos., 8 x 8 x 1.1 1200 mm throat As per Int. 2 Nos., 92 x 97.5 at top 68 x 89 at bot, 6 m 2 Nos., 92 x 160 at top 72 x 160 at bot, 5 m 2 Nos., 92 x 33 at top 66 x 20 at bot, 6.5 m


Power rqnt (W+SB) HP 6+6 6+3 400+0, 16 Nos., 25 HP -

49


Civil Designs

D) Up flow Anaerobic Sludge Blanket Reactor followed by Polishing Lagoons (UASB-PL) This process is based on anaerobic suspended growth system unlike earlier processes. Raw sewage is admitted to the inlet chamber for further processing for removal of large particles. Floating matter are trapped in the screen and removed with help of rack mechanism and put to conveyor belt for disposal through collection vehicle. Grit is removed in grit chamber and then sewage is admitted to UASB reactor. Sewage is uniformly distributed over entire tank. Four basic steps of anaerobic process takes place in this reactor and biomass consumes biodegradable matter during it’s’ passage through sludge blanket. All three operations, pre-sedimentation, anaerobic treatment and final sedimentation including sludge stabilization makes it attractive treatment option. Sludge developed in reactor tries to settle under gravity when applying moderate upward velocities in the reactor. Anaerobic microbes developed in reactor are kept in the compartment for sufficient time. Organic compound present in the sewage are absorbed or adsorbed on the sludge particles in the reactor during it’s’ passage through the bed. Organic compound gets converted to methane enriched bio-gas and small part into new bacterial mass after anaerobic biodegradation. Bio gas consists of methane CH4, carbon dioxide CO2, hydrogen gas H2, hydrogen sulfide H2S and traces of ammonia NH3 and nitrogen N2. Biogas generated in reactor is considered to be advantageous to promote this process. However, gas generation is found to be effective with high COD values and particularly useful for industrial waste. Sensitivity of process to absorb shock load and sulphate poisoning is considered to challenge before designers and operators of the plant. After UASB, polishing unit in form of lagoon or physicochemical process or conventional activated sludge process are must to achieve discharge norms. Description of functional requirement of each unit for UASB-PL is discussed in brief. 1)

Inlet Chamber

2)

Screen Chamber

3)

Detritor

4)

Parshall Flume

5)

UASB Reactor (UASBR)

6)

Pre Aeration Tank

7)

Aerobic Lagoon (AL)

8)

Settling Lagoon

9)

Sludge pump house

10)

Filtrate pump house

11)

Gas holder

12)


13)


First three units are considered to be Preliminary Treatment Units. 4th, 5th and 6th are secondary treatment units and remaining are supporting units for MWwTPs.


50


1.

Civil Designs




removal of large size floating materials like rags, plastics, tobacco pouches, wooden pieces etc. which otherwise would damage pumps and interfere with the performance of the subsequent units. This consists of bars placed parallel in vertical or inclined system across the flow to trap the floating material. Generally 20 mm spacing is considered to be adequate for STPs. However, considering the problem of pouches of tobacco passing thru’ it parallel to flow, finere screens with spacing of 12 mm followed in mesh pattern are in vogue. 50 mm x 10 mm thick flats are considered to be standard practice in India. Timer based racking mechanism cleans the screen periodically and put the screenings to belt conveyor system. Material is conveyed to collection van provided beneath the end of the belt conveyor for final disposal. CI Gates upstream and downstream to the screen are provided to control flow. 3.



UPFLOW ANAEROBIC SLUDGE BLANKET (UASB) REACTOR : Upflow Anaerobic Sludge

Blanket (UASB), was developed to treat industrial waste possessing high COD and BOD, posing power intensive treatment-if one opts for aerobic treatment. Hence anaerobic treatment was found to be techno-economical. Deficiencies of Septic Tank/s Imhoff Tanks/ Upflow Anaerobic Filters were attended and researchers have tried to ensure uniform distribution of flow, restricted upward velocities etc. To maintain sludge blanket at mid-level, upward velocity shall be applied to flow at moderate range. Wastewater enters the reactor from bottom at uniform flow rate and travels upward direction. This eliminated necessity of separate sedimentation tank. Anaerobic bacteria are developed in the reactor for sufficient time. In order to ensure sufficient contact between the incoming sewage and the sludge blanket (mass of anaerobic bacteria), the velocity of upward flow is restricted and uniform feeding rate of wastewater is ensured all over the bottom of the reactor. Organic compound present in the sewage are absorbed/ adsorbed on the sludge particles in the reaction zone. Further mixing is Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

51


Civil Designs

achieved by movement of biogas in upward direction, the density currents and settling of solids in downward direction. Organic compound are converted to biogas consisting of methane-enriched gas and new bacterial biomass. The gas is collected in the gas collector and used as energy source. A gas, liquid and solid separator (GLSS) is provided below the gas collector in order to maximize collection of gas (gas bubbles attached to sludge particles could lose contact and can be trapped into gas collector). 5.

PRE AERATION TANK : After UASBR, anaerobic microbes dominates the system since

sewage has undergone anaerobic treatment. Gases like methane and hydrogen sulfide are at saturation level and nature of the bio-culture is anaerobic. To change the anaerobic nature of the sewage and to make it amenable for aerobic treatment, pre-aeration shall be provided. Basic objective of this unit is to remove dissolved gases of anaerobic process and prepare culture suitable for aerobic treatment. 6.

AEROBIC LAGOON : After pre-aeration, sewage would undergo aerobic treatment in lagoons

to facilitate aerobic conversion of organic matter into biomass and gases. 7.

SETTLING TANK/ LAGOON : SST/SL permits activated biomass to settle in form of sludge.

Due to highly active biomass, lumps of biomass are formed and higher ratio of volume to surface area enhances the settlement. Now, major portion of organic content is converted into biomass, which is settled as sludge. Supernatant comprise very low BOD and SS and other parameters. In case the treated sewage is to be discharged into natural water body, the parameters comply with the norms prescribed by pollution control board. 8.

SLUDGE PUMP HOUSE : Sludge produced in the UASB is collected in the sump and pumped

to the sludge drying beds/ centrifuge/ filter press to reduce water content and amenable to use as manure. Concentration of sludge varies from 2% to 6% depending upon the status of biological process within reactor. Generally higher concentration prevails in the reactor, if performance is good. Considering its’ functional importance, 100% standby pumpsets are provided in this unit. 9.




high BOD and SS and hence prior to disposal into natural water body, it shall be treated. Filtrate pump house pumps back filtrate to the inlet chamber of PST and hence only treated sewage is discharged from the STP. Though quantity of filtrate is very low in terms of percentage, overall quantum is in terms of few thousand litres and hence it must be treated prior to discharge. 11.

GAS HOLDER : Gas produced in digester is collected here for further utilization like power


DUAL-FUEL GAS ENGINES/ GAS FLARING SYSTEM : Gas produced in the digester is

enriched with methane and high calorific value. Dual fuel engines capable of using gas (up to 8090%, generally 60%) and diesel (20-10%, generally 40%) can yield power sufficient to run more than Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

52


Civil Designs

half of the operations of the STP. Though it is very attractive, STPs initially set up with an objective to have captive power generation either in CASP or UASB has not been successful on large scale. This process is having following advantages 1)

It is a buzzword and considered to be adaptive if this process is implemented

2)

Power generation is considered to be only attractive aspect and advantage due to emerging power scenario world wide.


Process is having very low level of reliability, reaction kinetics are yet to well-established, not easy amenability to control and absorb shock loads.

2)

Sludge removal pose operational problems due to higher depth and accessibility.

3)


4)

Highly skilled personnel (biologist) are required to maintain process parameters

5)

Less safety of operating/ maintenance personnel in case defects in hood/ baffle, gutter, GLSS are to be rectified

6)


7)

Power generation is main slogan to promote the process. However, operationalisation of dual fuel engines for purely domestic waste has not become successful.

8)

Process is not proven world-wide, construction techniques are known to limited agencies restricting competition and rectangular reactors with higher depths becomes more costly.

9)

In case of disturbance of sludge blanket, resumption takes long time

10)

Lifecycle of upper hood and dome is not assured leading to uncertainty of the recurring cost. Unit Sizing: Upflow Anaerobic Sludge Blanket Reactor

Sr.


Size of the unit

Power rqnt (W+SB) HP

1

1 No., 6.5 x 4.5 x 3.3 2 Nos., 11 x 1.5 x 1.5 3 Nos., 8 x 8 x 1.1 1200 mm throat As per Int. 4 Nos., 32 x 32 x 6 2 Nos., 10.5 x 10.5 x 3.1

6+6 6+3

2 3

Preliminary Treatment Units Inlet Chamber Screen Chamber Grit Chamber Parshall Flume UASB Reactor Pre-Aeration Tank

4

Aerated Lagoon

5

Settling Lagoon

6 7 8 9 10

Sludge Pump House Filtrate Pump House Sludge Drying Beds Gas Holder Power Generator

2 Nos., 88 x 176 at top 64 x 164 at bot, 5 m 2 Nos., 88 x 48 at top 64 x 36 at bot, 6 m 1 No., 6 dia, 7 m ht 1 No., 4.5 dia, 4 m ht 22 Nos., 20 x 20 1 No., 18 dia, 5 ht. 12 x 8 x 6


15+0, 2 Nos., 7.5 HP 400+0, 16 Nos., 25 HP 7.5+7.5 6+0 -100

53


Civil Designs

TECHNO-ECONOMICAL ANALYSIS OF VARIOUS PROCESSES FOR SEWAGE TREATMENT Each of the process described in earlier chapters have distinct advantages and limitations. In the present context, while number of MWwTPs/ STPs are constructed under various projects/ grants/ aid for urban renewal/ river cleaning and are operational, challenges before technical feasibility of any/ all processes could be taken up and can successfully overcome various problems. However, practicability of each option, based on which particular process is selected, shall be looked into and yard-stick shall dictate a particular process rather than comparing all processes based on merits and demerits. Applicability of particular process for the expected raw sewage characteristics at Raiya is of the prime importance to select a particular option. Economical aspects and options, sensitivity needs to be analyzed before concluding for a particular process and then finally decide the treatment option. Technical considerations Based on the studies made by our team, data available about various STPs functional in India, supporting literature and merits/ demerits noticed, feed back from field operators, designers, and various ULBs, it is found that CASP/ FLEA and ANAL are betters options and more acceptable as compared to UASB. In our opinion UASB is not attractive option, since sewage is purely domestic in nature leading to low potential of power generation. CASP is having wider acceptability as compared to lagoons owing to sludge removal problems from the lagoons and maintenance of aerators. In case of lagoons, sewage level varies to a considerable extent. This is important aspect while selecting aerators for lagoons. Oxygen transfer depends upon submergence, which is limited in case of fixed aerators and hence efficiency of the MWwTP/STP is affected. Floating aerators are found to be best option, provided boat and other means are available for maintenance and repair. Except for Mumbai, other ULBs find it difficult to maintain and hence one has to compromise on efficiency by selecting fixed aerators. For CASP, Sludge Digesters on other hand have had problems of dome and explosion, maintaining anaerobic condition etc., which could be overcome by adopting gas mixing system instead of mechanical mixers. Hence, all the processes are treated as technically at par despite basic deficiencies related to O & M, even controlling behavior of microbes, less known reaction kinetics as in case of UASB. To conclude about best option, it is necessary to compare capital costs and O & M costs, NPV etc., to arrive at most economical option for sewage treatment. Subsequent paragraphs addresses this aspect prior to recommending the suitable process. Recommendations: Based on various analysis and applicability of the process for the said STP, Conventional Activated Sludge Process is most economical and it is recommended to select the CASP with power generation module for construction of the STP at Madhpar.


54


Civil Designs

6.3 Drainage Phase-III (Part-1) •

Background: During the period about last 10 years further development occurred in RUDA

area mostly on the west side of the old city and along South North direction also. The specific planning of development in these areas was not sought out during that time, however, on the occupied plots at various pockets in the said area, the construction of buildings were going on without having any permission basic facilities like roads, electricity and water supply network as well as waste water disposal system. This area came under rule of RMC in the year 1998. Therefore now, it is a duty of the authority to provide all the basic facilities as stated above, to the people of those areas. To provide drinking water facilities to the people of those areas a water supply project based on Nyari-II reservoir and its seepage was carried out, but due to scarce of water in the reservoir, the water supply system could not be put in to commission during this year. Similarly, subsequent problem of waste water disposal shall have to be faced immediately after commissioning of drinking water supply. To solve this problem a Sewerage Project Phase-III was thought out by Rajkot Municipal Corporation •

Field Survey : For the proposed project area, where town planning schemes was prepared,

the road alignment survey was carried out. This includes taking of levels at 30 mt. Interval along the roads, all the crossings and turning points etc have been covered with additional levels at 30 mt interval on center line of the road. For areas outside the town planning schemes, i.e. pockets developed like near Mavdi village, layout of such areas have been prepared and incorporated with the levels at 30 mt interval. Total length of roads are shown in the below mentioned table. Details of T.P.Roads in Town Planning Schemes Sr No 01 02

03

04 05 06 07

Name & Nos.of scheme T.P.S. 1 Raiya T.P.S. 2 Nana Mava T.P.S. 3 Nana Mava T.P.S. 4 Raiya T.P.S. 5 T.P.S. 6 Raiya T.P.S. 7&8 Mavdi

Length of Roads (in Meter)

Total

Sub Road

Tot. of Roads

45m

30m

24m

28m

18m

15m

12m

9m

1420

--

1400

1000

80

--

7385

3090

24375

24840

39215

240

2180

1180

1340

--

1340

4380

1240

11900

21140

33040

1260

--

1260

--

--

280

5710

5370

13880

8200

22080

--

--

1120

--

2800

--

4320

6150

14390

8280

22670

-1600

600 --

1060 1460

---

---

-820

4840 5500

2120 3160

8620 12540

8040 17040

16660 29580

--

--

--

--

--

--

--

--

21755

25000

46755

Total

210000

Ground levels have been recorded in the level books and same have been submitted as Survey And Investigation Report( For Population Projection Kindly Refer Annexure). The TBM list with location and RL in meters for TP scheme 1 to 8 and pocket areas have been identified , Sketches of locations also have been shown in the drawing No.01 to 08. Field Book record i.e. level Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

55


Civil Designs

Book No.01 to 21 have been also incorporated in the survey report for permanent record for Rajkot Municipal Corporation. For preparation of estimation of sewer lines, trial pits in the project area have been taken. •

Population Projection: The population projection is forecasted based on past available

data of population and sample studies of two TP areas partly developed and / or under developing, considering the number of persons 5 per house / flat for the occupation of 65% of total houses. Thus the projected population in the year 2030 is forecasted to 3,97,000 including the prospective population of three villages also as drainage collective system is generally designed for 30 years of period. •

Water supply: Saurashtra region is the semi arid zone and Rajkot city is falling in this area

where water is scares. Other cities of Gujarat State like Vadodara, Surat and Ahmedabad, total quantity of water per capita is supplied (considering all other sources) 250 liters and these figures are always taken into account by the consultants for calculation of generation of waste water for the design of collective system of sewer lines. Whereas to run the underground drainage, Central Public Health and Environmental Engineering Organization. (Ministry of Urban Development) has fixed criteria per capita bases and it is 140 to 150 liters / capita water requires to run the underground drainage system smoothly. Therefore, Rajkot Municipal Corporation has followed minimum requirement of water supply as per the criteria fixed by the CPHEEO New Delhi 140 to 150 LPCD to function the underground drainage of city area as well as proposed project area. The proposed project area is only of residential zone and hence no other demand like industry etc has been taken into account. The Rajkot Municipal Corporation has also planned to provide sufficient supply the water required for efficient functioning an commissioning of this sewerage project of extended area of the city simultaneously. •

Waste water generation: Normally 80 to 85% of the quantity of water reaching the

consumer's end is considered as waste water for the sewerage disposal system. Per capita waste water flow for the design of sewerage system is considered as 128 liters in this design. The estimation of ground water infiltration shall be practically zero as the ground water table in this region are very much below the designed depth of sewer lines. However, the provision of ground water infiltration has been estimated as per the criteria shown in Manual on sewerage & sewage treatment (Page 40) i.e. minimum 500 liters / km day for approximately 200 kms length is equal to 0.10 MLD which is negligible quantity against the total flow of the project. •

Design of sewers : The system design parameters for sewers are as per CPHEEO manual

which is the requirement of financing institutions. The design criteria for sewers are as follows:

•

Design Year: The design year considered for the sewerage system for this project area is 2030.


56


•

Civil Designs

Design Flow : The design is based on the waste water generated duly considering the water

demand of 150 LPCD as stated above in the year 2030. The design flow is therefore considered as 128 LPCD after considering losses and considering that 85% of water supply is converted to sewage. •

Peak Factor : Peak factors, depend upon the density of population, topography of the project

area and hours of water supply etc for design of sewerage system of project area, peak factor 2.25 is to be considered for the design based on contributory population recommended by CPHEEO in the manual. However, looking to the individual TP scheme population 2.50 peak factor is taken in the sewer design. The peak factor is applied to the projected population for the design year. •

Average Dry weather flow :This would comprise average domestic sewage flow and

infiltration. •

Peak Dry weather flow : This is the design flow. It comprises peak domestic sewage flow

and infiltration. •

Design formula :For design of new sewerage system, Manning's formula is adopted which is;

For Circular conduits V=

0.003968(D)0.67 x (S)0.50 N

•

Q=

(1/N) (3.118x10-6)D0.67 x S0.5

Q=

Discharge in lps

V=

Velocity in mps

N=

Manning's Co-efficient of Roughness

D=

Internal dia. of pipeline in mm

S=

Slope of hydraulic gradient

Coefficient of Roughness : For sewerage system, NP2/NP3/NP4 class RCC pipes for higher

diameter as well as stoneware glazed pipes for smaller diameter sewer line are generally provided. The roughness coefficient, N, is assumed same for all diameters of RCC pipes with collar joints and is considered 0.015. For stoneware pipes for all diameters, N, is assumed 0.013. As pipes deteriorate with age, a roughness co-efficient is considered corresponding to fair condition of the interior surface of sewers. •

Minimum size of Sewer: A minimum diameter of 150 mm has been considered to identify

the proposed sewer under study. Three factors are influencing for deciding the diameter of sewer pipeline. •

Proposed gradient in sewer line : Rajkot city is under semi arid zone and availability of

water quantity here is scarce resource. Hence, minimum criteria of water supply 140 LPCD to 150 LPCD is adopted by the Corporation for smooth functioning of sewer lines. Rajkot city Sewerage project phase-I was started in the year 1979 and completed and commissioned after 23 years of period. The main reason of delay of this project was a severe hard rock excavation and steep slope of initial pipelines in the design. Initial slopes of 150 mm dia pipelines were taken 1 in 80 to get very Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

57


Civil Designs

easy initial self cleansing velocity. Due to such design, depth of pipeline had gone very deep and due to hard rock it was found more difficult in the excavation. Ultimately, a decision was taken to adopt grade of 150 mm dia pipeline 1 in 130 which is found sufficient for 750 population of initial stage to achieve self cleansing velocity during peak hours. Hence based on the past experience of Rajkot city sewerage project phase-I and its present results of well functioning in the water scares period. It is proposed to provide 150 mm diameter as minimum for initial sewer lines. Major lengths of sewers in any project area are always with smaller diameters and these initial pipeline sections are not getting enough flow in the commissioning stage. Hence, as per the recommendations of World Bank in the previous sewerage project Phase-I, Stoneware pipes of minimum diameter 150 mm size is proposed in this project for initial sewer lines and same will be more convenient in cleaning in the initial stage of commissioning. More care is required for frequent cleaning during initial period. Stoneware pipes of ISI quality are now easily available in the market and hence it is recommended to use 150 mm to 250 mm dia pipes in this project as stoneware salt glazed ISI marked quality for initial sections of sewer lines.

•

Minimum Depth of Cover : The minimum depth of cover to be provided over the top of pipe

is 1.0 meter for diameter equal to and above 300 mm.

•

Self Cleansing Velocities :A minimum velocity of 0.75 to 0.80 mps at design peak flow (in

the year 2030) in the sanitary sewer is considered subject to a minimum velocity of 0.6 mps for present peak flows (in the year 2001) as per the recommendations of CPHEEO manual. Limiting velocities for particles varying in specific gravity from 1.01 to 2.65 were studied. The specific gravity of grit is usually in the range of 2.4 to 2.65. For minimum velocity of 0.6 m/sec all particles of specific gravity 2.65 and size less than 1.0 mm will remain in suspension. Hence, the velocity of 0.6 m/s should be adequate to prevent situation in sewers. However, the problem of silting may occur in early years, particularly for smaller sewers with velocities of flow less than 0.6 m/s but the assumption is made that the deposited silt would be flushed out during the peak flows. Where such velocities are not obtained periodical flushing would be required.

•

Design capacity of sewers : Sewers designed to carry estimated peak flows generated in the

year 2030 will run partially full for all variations in the flow. The maximum permissible depth of flow in sewers for established velocity criteria are tabulated in the following table.

•

Depth of Flow : From considerations of ventilation in waste water flow, sewers should not be

designed to run full. All sewers are be designed to flow 0.8 full at ultimate peak flow. However, as per Hydraulic design the depth of flow at Ultimate Peak is between 0.45 to 0.8.


58


Civil Designs

Following table shows the hydraulic properties of circular sections for Manning's Formula.

Hydraulic properties of circular sections for Manning's formula Depth Ratio

Area Ratio

Hydraulic radius Ratio

Velocity Ratio

Discharge Ratio

d/D

a/A

r/R

v/V

q/Q

0.100

0.052

0.254

0.401

0.021

0.200

0.143

0.482

0.615

0.088

0.300

0.252

0.684

0.776

0.196

0.400

0.373

0.857

0.902

0.337

0.500

0.500

1.000

1.000

0.500

0.600

0.626

1.110

1.072

0.671

0.700

0.748

1.185

1.120

0.838

0.800

0.858

1.217

1.140

0.988

0.900

0.949

1.192

1.124

1.066

1.000

1.000

1.000

1.000

1.000

where d, a, r, v and q denote depth of flow, area, hydraulic radius, velocity of flow and discharge respectively for partial flow condition and D, A, R, V and Q are the corresponding characteristics for full flow condition. •

Topography of the proposed project area : Detailed survey investigations have been

completed and based on the detailed survey the actual topographical conditions, sewerage network have been prepared to have minimum excavation of pipelines. A natural drain (Vonkala) coming from South direction of the project area flows towards North i.e. from near by Mavdi village to passing through out skirt of the extended area of the city to the west of the villages of Munjaka and Raiya meeting to the tributary of river Nyari on up stream of Nyari II reservoir. Therefore in general the natural slopes of the ground have been taken into account for planning the sewerage network.

•

Design methodology and analysis of sewerage network : Population distribution have

been carried out on present and projected density and same have been distributed per manhole in the TP scheme layout. Special consideration is given to the areas where high rise buildings exists and areas where such type of high rise buildings are expected in future. Per manwhole increase of flow has been calculated and for each sewer section, present average flow, present peak flow, projected average flow, projected peak flow and full flow have been calculated and applied as basic data of hydraulic design of sewer sections of entire network. Network have been prepared as per Town Planning Scheme Numbers 01 to 08 considering each Town Planning Scheme as individual drainage zone for convenience of execution, maintenance and supervision. The hydraulic analysis of all sewer sections as collective system have been carried out using Excel Computer Software Programming for all the four conditions of all sewer sections of network. It


59


Civil Designs

has been cross checked with the computer software recommended by the UNDP Sewer Software Version 3.0. Statements of design of sewer sections and designed Invert Levels have been attached herewith as an annexure. •

Sewer appurtenances: Manholes are to be provided at all junctions, change of sewer size,

gradient and direction. As per the RMC practice the spacing of manhole is kept between 25 to 40 mt for all diameters. •

Spacing of manholes adopted are as follows:

•

Pipe dia of 300 mm - 450 mm - 30 m

•

Pipe dia of 500 mm - 900 mm - 40 m

•

Pipe dia of 1000 mm - 1800 mm - 50 m

However, additional manholes are to be provided on junctions of the street avoiding standard distance. For sewers of 600 mm diameter and above, scraper manholes are proposed to be provided at major junctions and at about 200 m c/c. The typical details of proposed house connection chamber, conical type manhole, A, B, C, D1, D2 and scraper manhole S1, S2, S3 are shown in Annexure.

Bedding for sewers: The type of bedding (First class bedding, concrete cradle, full encasement) shall depend on the depth at which the sewer is laid. Thus the load due to backfill and superimposed load (live load), and the three edge bearing strength of pipe will be the governing criteria for selection of appropriate bedding factors.

6.4 Design of Sewage Treatment Plant at Raiya under Phase-III (Part-1) Existing sewage treatment plant In the phase-I, the waste treatment process has been adopted keeping view the most of the waste will contain a domestic waste i.e. sewage excreta and sullage water rather than any other major industrial waste. Therefore process of treatment is provided considering the characteristics of raw sewage having BOD 200mg/l, which is a facultative aerated lagoon followed by extended aeration for the capacity to treat 44.50 MLD. This treatment unit does not carry any further additional load due to further augmentation or future provision of extended area. However, additional land has been kept reserved in the premises of existing treatment site for the purpose of any additional treatment units for the Sewerage Project Phase-II of old city area. While as per the topographical situation mentioned previously the land located nearby village Raiya is technically as well as economically feasible for adoption of new waste water treatment units and disposal of treated waste for sewerage project phase-III Acquisition of Land : Additional land is already reserved at existing sewage treatment plant site nearby Madhapar under Phase-I and Phase-II sewerage project but it will not suffice to accommodate sewage treatment units proposed under phase-III sewerage project, and which is also not feasible as narrated in the preliminary project report, technically as well as financially. The land near village Raiya has been acquired, to accommodate sewage treatment units including some necessary disposal facilities. The Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

60


Civil Designs

Gujarat Pollution Control Board (GPCPB) has already approved the site and RMC has already finalized DTPs Process design options The number of approaches and advanced techniques are prevailing at present to treat the domestic waste water as well as industrial waste water. Normally biological treatments are used world wide and they are suitable for sewage treatment plant,. Following are the options of biological treatment for treatment of domestic sewage. Following review is made.

Looking to the techno-economical aspect- Conventional Activated Sludge Process with Sludge digester is recommended to be adopted for Sewage Treatment Plant Location of the Works The Works are to be constructed at Raiya located approximately 3 km west of the city limits of Rajkot in the State of Gujarat, India. The detailed location is shown on the Drawings.

Description of the Works The Works shall comprise the provision of a sewage treatment plant to treat up to 51 Mld of raw sewage generated in new area and to discharge the treated sewage into a natural drain leading to river Nyari of the specified quality. The sewage treatment plant shall comprise the following: (a)

Unit processes and services •

Inlet chamber;

•

Screen Chamber;

•

Grit Chamber;

•

Parshall Flume;

•

Primary Clarifier;

•

Aeration Tank;

•

Secondary Clarifier;

•

Sludge Digester and Sludge Drying Beds;

•

Raw Sludge and Return Sludge Pump Houses

•

Sewage sampling;

•

Service water;

•

MCC Room.

Raw Sewage Raw Sewage Quality Generally, the raw sewage has a low suspended solids, but during morning hours, its concentration rises from less than 200 mg/l to 800-1000 mg/l. At the same time other parameters does not change substantially. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

61


Civil Designs

The treatment works shall be designed to treat sewage of the following quality:

Raw Sewage Quality Parameter pH

Units of measurement pH units

Value 6.5 - 9.2

Suspended Solids

mg/l

525

Biological Oxygen Demand

mg/l

200

Chemical Oxygen Demand

mg/l

630

Alkalinity

mg/l

185

Sulphates

mg/l

110

Total Kjeldah Nitrogen

mg/l

10

Ammonical Nitrogen

mg/l

16.8

Organic content in grit

%

4

Oil & Grease

mg/l

15

The quality of the raw sewage entering into existing Sewage Treatment Plant at Madhapar over the period January 2005 to December 2005 is summarized in Appendix ___.

Sewage Treatment Plant Performance The sewage treatment plant shall be designed for continuous operation even with reduction of flow by 50%, the performance of the plant should not be affected. The purpose of the treatment plant is to produce treated sewage suitable to discharge it into natural water body as per the guidelines stipulated by Gujarat Pollution Control Board (GPCB) and as per guidelines of Central Public Health and Environmental Engineering Organisation (CPHEEO) as summarised in Table. When the sewage treatment plant is operated in accordance with the Contractor’s operating instructions at an output varying within the normal operating range (50 % to 100 % of rated flow), the quality of the treated sewage, the primarily treated sewage (from the launder of primary settling tank) and the secondarily treated sewage (from the launder of secondary settling tank) shall comply with the requirements stated in Table: Required Treated Sewage Quality Sample

Compliance Requirement

Effluent from PST

BOD<150 mg/l SS<250 mg/l

Effluent from SST

BOD<20 mg/l SS<30 mg/l pH 6 to 9


62


Civil Designs

Sewage Treatment Plant Staffing Requirements The Employer will provide all the necessary operating staff and maintenance personnel to operate the Works. During the first 36 months (three years) the plant shall be operated under the Contractor’s guidance using the staffing levels identified. The details of staff to be deployed will be as per the stipulations mentioned in O & M Specifications. Plant and Process Design Parameters General The Plant shall be designed, selected and installed taking into account site ambient conditions, local conditions and location. The following site conditions shall apply •

ambient temperature (plant room)

-

35oC

•

annual average temperature

-

30oC

•

Relative humidity (maximum)

-

75%

•

Altitude

-

125 m

•

site conditions

-

semi-arid

The plant shall be designed for an ambient temperature of 40º C with the Contractor making due allowance in his designs for the increased temperatures experienced by Plant exposed to direct sunlight. Works Life Expectancy The Contractor shall design the Works for a life expectancy as follows: •

concrete structures

60 years;

•

mechanical plant

25 years;

•

electrical plant

25 years;

•

buried earth electrode systems

50 years;

•

control panels

25 years;

•

external instrumentation systems

15 years;

• computer systems The major units comprises a) Elevated inlet chamber

12 years.

b) Main plant by-pass pipeline from Inlet chamber to effluent disposal point c) Elevated screen chamber d) Elevated grit chamber e) Flow measuring channel – Parshall flume f) Distribution chamber for Primary Settling Tank (PST) g) By pass pipeline from Distribution chamber to main plant bypass pipeline h) Primary Settling Tank (PST)


63


Civil Designs

i) Outlet pipeline from PST up to the distribution chamber of Aeration Tank j) Distribution chamber of aeration tanks. k) By pass pipeline from the distribution chamber of aeration tank to effluent disposal point l) Aeration tanks m) Distribution chamber at outlet of aeration tank for Secondary Settling Tank (SST). n) Pipeline from chamber to each SST. o) Secondary Settling Tank (SST) p) Final effluent pipe/channels from settling tanks to treated sewage chamber q) Pipe/Channel from treated sewage chamber to final disposal point r) Digesters with gas mixing devices s) Compressors for gas mixing t) Gas holders (single stage bell) u) Sludge drying beds v) Raw sludge pumping station including control room for Primary Treatment Units (PTU) w) Return sludge pumping station including control room to pump the Return Sludge and Excess Sludge. x) Control room for Aeration tank y) Control room for Digesters, Gasholders, and Gas Mixing arrangement. z) Filtrate pumping station. aa) Gas burner for excess gas The other units required are: a) Sub-station to serve the proposed sewage treatment plant. b) Administrative building, conference room, laboratory c) Internal roads, CC path, storm water drainage (wherever required) for the plant. d) Water distribution network for drinking purpose within the plant premises and sewage disposal

2. Design criteria Elevated Inlet chamber and plant by-pass

Inlet chamber shall be adequately sized to receive sewage from pumping main and to provide plant bye pass having peak hydraulic carrying capacity of 114.75 Mld plant bypass Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

64


Civil Designs

shall be designed to attain 0.9 m/sec to 1.5 m/sec velocity at peak flow duly considering the available hydraulic head at the plant from inlet chamber to discharge point. Hydraulic Detention Time shall be 60 seconds minimum at peak flow. Elevated screen chamber a)

Peak flow (Design flow)

114.75

Mld

b)

Average flow

51

Mld

c)

Number of Screens

Two screen in parallel, each to deal with peak flow and incline at 60° to horizontal and mechanically cleaned/ raked.

d)

Number of channels

Two screen channels, each designed for peak flow.

e)

Velocity in approach 0.4 channel during average flow (minimum)

m/ sec

f)

Max velocity through 1.2 screen at peak flow

m/sec

g)

Flats of screen Tapered in 10 mm x 8 mm x 75 mm the direction of flow (front x back x depth )

h)

Clear opening between two 12 mm flats at back

i)

Free board above TWL

0.5 m

Elevated Grit Chamber a)

Peak flow

114.75

mld

b)

Average flow

51

mld

c)

Number of grit chambers

Three grit chambers to be 2+1 Nos designed for handling the 1.5 each for half times the peak flow and (two of peak flow working and one standby unit of similar size).

d)

Specific gravity of grit

2.45

e)

Size of particles equal to 0.15 and above which are to be removed 100%


mm

65


Civil Designs

m3/m1

f)

Quantity of grit in sewage

0.1

g)

Horizontal velocity in grit 0.30 chamber not to exceed at peak flow

m/sec

h)

Temperature of sewage (design)

18

°C

i)

Filed correction factor for surface loading

0.80

j)

Detention time (minimum)

60

sec

k)

Minimum depth of wall in grit chamber at outlet weir excluding corner filling of 300 mm)

0.9

m

l)

Organic matter in washed grit not to exceed

3

%

m)

Free board above – TWL

0.5

m

Primary Settling tank a)

Peak flow

114.75

mld

b)

Average flow

51

mld

c)

Excess sludge, filtrate and supernatant shall be added in distribution chamber of primary settling tank as per layout plan and grease and oil will be separately disposed off

d)

Number of circular tanks …

Two unit each to deal with 25.50 mld flow plus other flow (excess sludge, filtrate, sludge, filterate, supernatant)

e)

Surface loading (effective) at average flow + other flow

35

m3/day/m2

f)

Surface loading at peak flow

80

m3/day/m2

g)

Detention time at average flow excluding Hopper bottom volume, but including other flows

2.25

hours

h)

Side water depth minimum (up to 3.0 top of weir)


m

66


Civil Designs

i)

Slope of hopper bottom

I V to 12 H

j)

Weir loading at avg. flow + other flows (not to exceed)

150

m3/day/m

k)

Weir loading at peak flow + other flows (not to exceed)

370

m3/day/m

l)

BOD 3 @27 ˚C removal in PST (min)

40

%

m)

Suspended solids removal in primary settling tank (min)

60

%

n)

Solids concentration in primary sludge

5

%

Note: a)

All piping/channels and launder of primary settling tank shall be designed for peak flow including any other flows as per layout plan with minimum velocity of 0.6 m/sec at average flow.

b)

All peripheral launder of primary settling tank shall be designed for peak flow with velocity of 0.9 m/sec and any other flow as per layout plan.

c)

Free Board of peripheral launder (minimum)

0.5

m

d)

Free fall in peripheral launder /trough with respect to weir crest (bottom-most portion of V Notch).

50

mm

Aeration Tank a)

Peak flow

114.75

mld

b)

Average flow

51

mld

c)

Number of tanks

One tank with two compartments to deal with avg. flow plus all other flow as per layout plan.

d)

Detention time at average flow + 25% of avg. flow return sludge + all other flows as per layout plan.

Six hours minimum

f)

Kg BOD 3 27°c loading/m3 of

0.3 – 0.6


67


Civil Designs

tank volume (check) g)

MLSS in aeration tank

2000 mg/1

h)

MLVSS in aeration tank

80% of MLSS

i)

Food to micro-organism ratio (F/M)

0.2-0.4

(i.e. kg BOD5 @ 27°C/kg MLVSS) j)

Sludge age (θc) minimum

10 days

k)

Free board above TWL

1.0 m

l)

Oxygen requirement

1 kg O2 /kg of BOD 3 @ 27° c removed

m)

Oxygen transfer required at standard condition (min)

2.0

n)

Dissolved oxygen to be 1.5 maintained in the aeration tank (minimum)

mg/1

o)

Field transfer rate of aerators 1.22 (minimum) FTR

kg O2/KWhr

p)

Mixing requirement of KW

KW/m3

0.015-0.026

Kg/ kW. Hr.

All other flow reaching the tank as per layout plan shall be considered in the design. Secondary Settling tank a)

Peak flow

114.75

mld

b)

Average flow

51

mld

c)

Number of circular tanks & their capacity requirement

Two units each to deal with 25.5 mld flow + return sludge + filtrate + supernatant + excess sludge. [as per layout plan]

d)

Surface loading (effective) at average flow + all other flows + return sludge.

28

m3/day/m2

e)

Detention time excluding hopper bottom volume but including other flows (minimum)

2

Hours

f)

Side water depth (minimum) up to top of weir

3.5

m

g)

Hopper bottom slope

1 V to 12 H


68


h)

Weir loading at avg. flow + other flows (by providing weirs as required). Upflow velocity near weir at average flow (not to exceed)

Civil Designs

185-370

m3/day/m

7

m3/hour/m

i)

Solids concentration in secondary sludge

1%

j)

Solids loading rate at average flow based on MLSS

70-140

kg/day/m2

k)

Solids loading rate at peak flow based on MLSS (not to exceed)

210

kg/day/m2

a)

All pipes/channel to secondary settling tanks shall be designed for peak flow including other flows as per layout plan

b)

All weir and troughs of secondary settling tanks shall be designed for peak flows as per layout plan with velocity of 0.9 m/sec.

c)

Free board (minimum)

0.50 m

d)

Free fall in peripheral launder /trough with respect to weir crest (bottom-most portion of V Notch).

0.05 m

Digesters a)

Raw sludge (primary + secondary) solids concentration

4

%

b)

Volatile solids

50%

c)

Specific gravity of raw sludge

1.07

d)

Volatile solids destroyed during digestion (min)

60

%

e)

Temperature of digestion

30

°C

f)

Detention time for digestion @ stated Temperatures

30

days

Addl. HRT for monsoon period

15

days

g)

Solids concentration in digested sludge

8

%

h)

Number of units required

2

nos.

i)

Solids loading

0.75

kg VSS/day/m3


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Civil Designs

j)

Bottom hopper slope

1 V to 4 H

k)

Mixing system

Gas mixing unconfined

l)

Gas flow required for gas mixing

0.005

Compressor operating capacity

1

m)

Velocity gradient

50-80

Sec-1

n)

Sludge circulation velocity

0.05-0.10

m/sec

o)

Power level to be maintained

5

Watts/m3 (min.)

p)

Gas lances required

15-35

Sq. mt / No.

m3/m3.min(min) m3/hr.m2 (min)

Gas Holder m3/kg of VSS destroyed

a)

Gas production in sludge digester

0.9

b)

Gas is to be utilized in plant.

Future (not in present contract)

c)

Storage capacity of gas.

1

d)

Gas to be burnt

100%

e)

Number of units required

2

day

nos

Sludge Drying Beds a)

Preferred size of each bed.

20 m x 20m

b)

Depth of digested sludge application on the drying beds.

0.3

m

c)

Cycle time of drying including restoring to original state of original state of bed.

12

days

d)

Solids concentration of dried sludge prior to application on bad.

8

%

e)

Moisture concentration of dried sludge amenable for spading and carting away.

40

% at 40 ºC

f)

Standby beds required

2

nos.


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Civil Designs

Raw sludge pumping station a)

Sludge concentration

5

%

b)

Specific gravity of sludge

1.07

c)

Actual pumping hours for sludge pumping per day

As required

d)

Minimum diameter of pumping 200 main to avoid chock age.

mm

e)

Hydraulic Retention Time for raw sludge during maximum concentration of 2000 mg/l at peak flow

2

hour

f)

SWD for storage sump below pipe invert level

2

m

hrs/day

Return sludge pumping station a)

Quantity of return sludge

Up to 75% of avg. Flow + excess sludge

b)

Concentration of solids in return sludge

1

%

c)

Hydraulic Retention Time for return sludge during normal rate of pumping (25%)

1

hour

d)

Specific gravity of return sludge

1.02

e)

Minimum diameter of pumping main to avoid chock age.

200

mm

f)


2

m

Filtrate pumping station a)

Solid concentration in filtrate

200-300

mg/1

b)

Minimum diameter of pumping main

150

mm

c)


2

m


71


Civil Designs

Pipeline a)

Pipeline for Main plant by pass from inlet chamber to final disposal point

b)

Pipeline from distribution chamber ahead of PST to main plant bypass

c)

Pipeline from distribution chamber ahead of aeration tank to main plant bypass

d)

Treated effluent pipeline from SST to common collection chamber and pipeline from common collection chamber to final disposal point

e)

Channel From inlet chamber to screen chamber

f)

Channel from Screen chamber to grit chamber.

g)

Channel from Grit chamber to parshall flume.

h)

Pipeline from distribution chamber of PST to PST Central feed well

i)

Pipeline from PST outlet to distribution chamber of aeration tank

j)

Pipeline from outlet of Aeration Tank to of central feed well SST

k)

Washout for aeration tank shall be provided and connected to bypass line for emptying the unit by gravity with a minimum size of 450 mm dia DI, K-9 class pipeline with valve of same size

All above channels/ pipeline shall be designed for peak flow including all other flow as per layout plan. Maximum velocity shall be limited to 1.5 m/sec for bypass. Velocity at average flow shall not be less than 0.6 m/sec for interconnecting units/chambers and shall not exceed 1.35 m/sec at peak flows. Minimum velocity of 1.5 m/sec shall be maintained to prevent solids deposition and clogging of pipeline for sludge carrying/conveying pumping mains. 3. Process description 3.1 General : Average flow. …. . Peak flow…………………………..

51.00 MLD. 114.75 MLD.

3.2 Inlet chamber: Inlet chamber of suitable size shall be constructed at the location, shown in the layout plan. Sewage into inlet chamber shall be received through 1 no. 1100 mm Rising main from the pumping station located outside the plant about 1 km. toward town, which is under construction. Tentative sizing and RLs of inlet chambers are given below.

Hydraulic retention time………… Size……………………………… Nos……………………………… Floor level………………………. Top water level…… ……………. Free board………… ……………. Chamber top level……………….. Platform/Passage top level… . …..

60 seconds at peak flow of 114.75 MLD. 6.50 m. x 4.50 m. x 3.00 m depth 1 RL. 127.90 m. RL. 130.90 m. 0.30 m. RL. 131.20 m. RL. 131.35 m.


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Civil Designs

Size of opening for inlet pipe…….. suitable for 1300 mm dia. PS pipe Size of opening for plant bypass…. suitable for 1300 mm dia. RCC NP-4 pipe Size of plant bypass gate……….… as required (C.I. SLUICE GATE with penstock) Size of opening at outlet side…….. as required. Nos. of openings………………….. 2 nos. Size of gate on this opening…… as required (C.I. SLUICE GATE with penstock) The inlet chamber shall be provided with required number of DI puddle collars both ends flanged with creeping flange at middle of wall. This is to be fixed while concreting of inlet chamber under progress. Necessary precaution shall be taken to avoid leakage. Necessary C.I. GATES shall be provided to plant bypass exit, at inlet chamber. Necessary platform / passage at upper level (R.C.C. construction) shall be made to locate the penstock for gate operation and inspection purpose. Plant bypass shall be designed for peak flow carrying the sewage and ultimately disposed into the existing culvert on natural drain outside the plant premises. Primary treatment units Bypass after the preliminary treatment units and Secondary treatment units, a bypass after the primary settling tank, i.e. before the aeration, shall be provided as shown in the layout plan and as directed by engineer in charge. All bypass lines and pipe carrying treated sewage (excluding sludge & interconnecting treatment units) shall be of R.C.C. NP4 class pipe. Pipe carrying raw sewage for treatment, i.e. inlet and outlet of PST & SST, shall be of R.C.C. NP4 class. Pipe from SUDGE DIGESTER to each SLUDGE DRYING BEDS shall be of 300 mm. Dia. minimum D.I. K-9 class. Filtrate collected beneath sludge drying beds shall be conveyed from each SLUDGE DRYING BED to FILTRATE PUMP HOUSE (FPH) through 300 mm. Dia. R.C.C. NP4 class pipe. From FPH, filtered sludge shall be carried to DISTRIBUTION CHAMBER after Parshall Flume to recycle the sewage and assure zero discharge of raw sewage. No sewage shall be let out without treatment. Supernatant from sludge digester shall be conveyed to distribution chamber of PST by gravity only. 2.2

ELEVATED BAR SCREEN CHAMBERS An elevated channel 2 Nos. having peak flow capacity of 114.75 MLD each, shall be

constructed in R.C.C. M-25 grade. An upstream channel of minimum 6.0 m. length and downstream channel of minimum 3.0 m. length. Shall be provided before and after the screen chamber. The peak flow velocity in the channel shall be around 0.80 m/sec and velocity at average flow shall not be less than 0.60 m/sec. The channel shall be adequately widened to accommodate the screens. Indicative sizing of the channel and bar screen is tabulated below. Channels Size (u/s channel)…………… 1.50 m width x 1.20 m. depth Size (d/s channel)…………… 1.50 m width x 1.20 m. depth Nos…………………………. 2 Floor level…………………… RL. 129.55 m. Top water level (u/s channel)… RL. 130.75 m. Top water level (d/s channel)… RL.depending up on the headloss Free board………… ………… 0.30 m. minimum Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

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Civil Designs

Channel top level…………….. RL. As required Platform/Passage top level…… RL. As required by screen mechanism supplier Screen Chambers Type of screen………………… MECHANICAL INCLINED BAR SCREEN. Size of chamber including bars.. 1.50 M. width x 2.0 m. length of screen bar Bar section…………………… tapered 75mm x 10mm th. (10 th at front & 8 th. at rear side) Nos of screens………………... 2 Size & nos of openings………. 12 mm clear size on rear side & nos. as rqd. Floor level……………………. RL.129.33 Top water level (u/s of screen)… RL.130.75 Top water level (d/s of screen)… RL. Depends up on the headloss Chamber top level……………… RL. According to screen mechanism details Platform/Passage top level… . … RL. According to screen mechanism details Velocity criteria through BAR SCREEN Maximum velocity through bar screen Minimum velocity through bar screen Minimum velocity through bar screen

1.20 m/sec.(preferably about 0.80 m/sec.) 0.60 m/sec.(at average flow.) 0.30 m/sec.(at minimum flow.)

Mechanism of Bar Screen Minimum 200 mm of depression shall be provided between the u/s channel floor level and screen chamber floor where the screen bars are fixed. Suitable floor slope shall be provided at u/s and at d/s channel.Suitable mechanical inclined bar type screen shall be provided. Screen shall be comprising screen bars made out of 75 mm x 10 mm thick (at upstream side) x 8 mm at downstream side M.S. Flats with 12 mm clear opening between the bars at downstream side (10 mm at upstream side) and rake getting engaged at the bottom of the bars and disengaging at the top of the bars thus in the process of removing the screenings. The rake will have spring loaded action for cushioning and providing feathering action over the materials stuck in the bars. Stroke of the raking mechanism can be adjusted. Rake will be driven through worm gear drive with 1440 RPM and of required HP motor. Fasteners and anchor bolts shall be in M.S. galvanized construction. 2.3

ELEVATED GRIT CHAMBER Hydraulic retention time……

60 seconds at peak flow of 57.375 MLD per tank.

Nos………………………………...

2+1 standby total 3 nos.

Hydraulic retention time… 60 seconds at peak flow of 57.375 MLD per tank. Settling velocity…………. 2.0 cm/sec. Maximum. Constant horizontal velocity 15 to 30 cm/sec Size………………………… 8.0 m. x 8.0 m. x 1.45m.depth Nos………………………… 2 working + 1 standby (total 3 nos.) Floor level…………………. RL. 128.90 m. Top water level…… ………. RL. 130.35 m. Free board………… ………. 0.45 m. minimum Chamber’s sidewalls top level-RL. 130.80 minimum (parallel to flow direction) Inlet deflector top level…… According to grit mechanism details Outlet wall top level……… As required Platform resting grit mechanism According to grit mechanism details Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

74


Passage top level………… Nos of gates……………… Bottom level of gate……… Size of gates…….. ………

Civil Designs

As required 3 As required As required

Three grit chambers each having capacity of 57.375 MLD flow shall be designed to remove 100 % percent grit particles of 0.15 mm diameter having specific gravity of 2.45. The container wall depth at outlet side shall not be less than 1.20 M. (diff. Between wall top and floor level). The bottom 300 mm. depth of the grit chamber shall be made circular by casting P.C.C at all corners. Outer corners of the square grit chamber shall be sloped towards center. One no. C.I. penstock gates at the inlet side of each grit chamber shall be provided for isolation purpose. Necessary platform at all levels for operation of GATES, resting GRIT REMOVAL MECHANISM, with suitable R.C.C. stair for access shall be provided. All platforms/passages shall be provided with GI. PIPE & POST RAILING to both sides. The flow from the screen chamber shall be allowed into the grit chamber for removal of grit matter. The flow into the grit channel will be received through the main channel coming out from the screen chamber. Individual flow distribution inlet channel to the grit chamber shall be tapered. The grit chamber shall be square detritus type with central scrapping mechanism for removal of grit. The out flow from the grit chamber shall be from an over flow weir into the outlet channel, which shall be tapered. Grit shall be collected through one pocket at suitable location of the chamber and by means of rake type classifier mechanism in mild steel, epoxy painted; grit shall be washed & discharged into hopper, which shall be received in a trolley. The organic return pump with suitable motor shall return the organic matter, at inlet side of the grit chamber. The central drive shall be made up of worm gears of suitable torque and driven by 1440 rpm motor of required hp. Suitable drive shaft (pipe shaft) shall be connected with the drive at the top and shall have guide arrangement at the bottom end. Three nos. of scrappers shall be connected with the drive shaft at the lower end. Each scrapper shall span the radius of the tank and shall be spaced at 120 degree intervals. Scrapper/raking plate with scooping arrangement at the outer end of the scrapper shall push the grit towards the openings on the classifier sidewalls at the bottom. The grit shall thus be pushed to the classifier bottom through the openings in sidewalls. The drive shall be provided with mechanical shear pin arrangement for overload protection. The grit chamber works on velocity principle and shall be so designed that only the grit settles down and organic materials overflows out for further treatment. The velocity in the chamber thus has to be uniformed and the uniform flow shall have to be maintained at the inlet side of the grit chamber (detritor). Diffusers at inlet side shall be adequately provided at equidistant, vertically aligned with central bar embedded and extending from floor up to the chamber top. Necessary arrangement shall be provided to rotate the diffuser in horizontal plane and thereby shall permit required angle settings. Diffusers shall be of uniform shape and factory made precast R.C.C. construction covered with steel sleeve all around. Necessary R.C.C. beam/platform shall be provided to regulate the diffuser from chamber top. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

75


Civil Designs

The classifier mechanism shall comprise of reciprocating rake driven by a gear drive fitted with 1440 rpm and of required HP motor. The gear motor shall provide rotating motion to link mechanisms that will convert the rotating mechanism to reciprocating raking action. The reciprocating travel and continuous scooping washes the grit in the classifier and in the process the grit is delivered from the top of the classifier through a chute for further disposal. Organic Return Pump returns the washed organic liquor lying in the classifier back to the detritor collection chamber. The classifier drive shall be provided with mechanical shear pin arrangement for overload protection. There shall not be moving parts or bearings under the water so that maintenance required becomes minimal. Flow measuring channel The outlet channel emerging from the grit chamber shall have necessary arrangement to observe the discharge ranging from 3.0 MLD to 166.20 MLD with help of parshall flume. The flume shall be designed for peak flow capacity of 114.75 MLD. A straight uniform channel of minimum 6.0 m. length u/s to flume and minimum 3.0 m. length d/s to flume shall be provided. The throat width of the flume shall be 1200 mm with required convergent and divergent cone sections. Necessary platform at suitable levels with M. S. post and G.I. PIPE railing in three rows shall be provided for inspection purposes with necessary staircases. Dimension of the parshall flume are given below. Parshall Flume Length of u/s channel………… 6.00 m. minimum Length of d/s channel………… 3.00 m. minimum Throat width of flume………… 1.20 m. minimum Convergent & divergent cone… as required. Distribution Chamber Size ……………………………as required Top water level ………………. 129.30 m. maximum Floor level ………………………as required Throat width of flume……………1.20 m. minimum Convergent & divergent cone……as required. Bypass line RCC NP4……………1100 mm dia. Pipe to PST RCC NP4……………800 mm dia. Nos of CI sluice gates…………….3 nos of required size Distribution chamber for primary settling tank There shall be a distribution chamber after parshall flume from which bypass pipe with C.I. penstock gate, having peak flow capacity of 114.75 MLD and connected to plant bypass TRUNK SEWER at the location shown in the layout plan shall be provided. Distribution Chamber Size ……………………………as required Top water level ………………. 129.30 m. maximum Floor level ………………………as required


76


Civil Designs

Throat width of flume……………1.20 m. minimum Convergent & divergent cone……as required. Bypass line RCC NP4……………1100 mm dia. Pipe to PST RCC NP4……………800 mm dia. Nos of CI sluice gates…………….3 nos of required size Also, a separate pipe for each PST, of RCC NP4 class from the Distribution chamber shall be provided which will discharge into central pier of PRIMARY SETTLING TANK (PST) as shown in layout plan. The top level of Distribution chamber shall be extended up to the top level of Parshall flume. The flow shall be diverted equally through pipeline into the PST as shown in layout plan. CI Penstoke gates to both these pipe exit at distribution chamber shall be provided. All necessary R.C.C. platform for operating total three nos. of sluice gates shall be provided at suitable levels. Required R.C.C. passages with hand-railing etc. shall also be provided as per the detailed approved drawing and as directed by engineer in charge. Primary settling tanks (pst) Two numbers, circular R.C.C. PST shall be provide which shall be designed for an total avg. flow of 51.00 MLD and flow of filtrate from sludge drying beds and supernatant from sludge digester and excess sludge. Indicative sizing with RLs is given below. Hydraulic retention time……… 2.25 Hours at average flow plus other returned flows Size…………………………… 31.50 m. dia. x 3.20 m.depth of side water Nos…………………………… 2 nos. Inner dia of RCC central inlet pier. 2.50 m. Inner dia of central feed well…… 5.00 m. to 5.50 m. (i.e. FRP deflector box) Floor level at side wall base……. RL. 125.90 m. Floor slope toward center………. 1 : 12 Free board………… …………… 0.50 m. minimum Top water level of tank…… . ….. RL. 129.10 m. Top water level of launder ……… RL. 128.95 m. maximum Top of wall………………………. RL. 129.60 m. Type of launder………………….. Double weir type Central pier bottom level………… RL. 123.17 m. RCC Central pier top level………. As required (minimum RL 129.90 m.) In calculating detention period, the volume of hopper bottom shall not be considered. The hopper bottom slope shall be 1 vertical to 12 horizontal towards center. The RCC NP4 feeder pipe from distribution chamber shall enter in bottom of settling tank and terminate into central feed well. Required openings of suitable size in the inner face of the central pier shall be provided the central pier shall extend above TWL so that the scrapper bridge mechanism can easily be installed. Entry port shall be submerged 0.3 m to 0.6 m below TWL. A platform all around the central pier shall be provide. The diameter of central feed well shall be 15 % of the diameter of PST, this shall extend 25 mm below maximum TWL and 1.5 m below maximum TWL. The central feed well shall be made of GRP plates of minimum 8 mm thickness. Deflector box shall be hung from the central pier.


77


Civil Designs

Peripheral launder of each settling tank shall be designed for peak flow of 114.75 MLD while designing the peripheral launder half the peak flow shall flow in clockwise direction and half shall flow in anticlockwise direction, meeting at a point on periphery and flow shall be from upstream to downstream of the 0.75 m. velocity in the launder shall be minimum of 1.0 m/sec at peak flow. Free fall from the launder shall not be less than 50 mm with respect to launder crest. Effluent from the peripheral launder shall be collected at outlet of the settling tank from where through chamber it shall be conveyed to distribution chamber of the aeration tank. A series of 90° FRP V Notch shall be provided all along around the periphery of the weir for uniform distribution of flow. Thickness of FRP plate shall be minimum of 6 mm. The height of the V notch shall not be lass then 75 mm. Clearance between two V notch at top shall not be less then 50 mm. Bottom of the V notch shall be minimum 25 mm. Above the crest of the trough. It should be possible to adjust the V notches within the range of 50 mm. V notches shall be fitted on weir by providing rag bolts made of stain less steel. Scum skimming arm shall be provided to remove the scum. Scum shall be collected and discharged into a hopper, provided at the periphery of the settling tank. The scum shall be collected by means of 300-mm. dia. D.I. pipe provided with a sluice valve into a sump constructed outside the primary settling tank. Peripheral FRP scum baffle, which shall extend 150 mm. above TWL & 450 mm. below TWL, shall extend 450 mm. ahead of launder. Thickness of FRP baffle shall be 6 mm. Appropriate disposal arrangement shall be made. A C.I. telescopic sludge draw-off valve of 300 mm dia. shall be provided. The sludge deposited at the bottom of the settling tank shall be collected in the sump provided near the mechanism by scrapper mechanism. The scrapers shall be hung from the bridge and shall have neoprene squeezes at the lower end for matching the slope. Slip ring collector shall be provided over central bearing at central point for current distribution to traction drive. All parts of the mechanism shall be sand blasted and epoxy painted. Peripheral driven PST mechanism suitable for the designed/approved tank size, comprising half bridge of 1.0 m. width with chequered plates and handrails, supported on central pier top at central end on center pivot bearing and driven by traction drive fitted with mild steel wheels at peripheral end shall be provided. Groove for the traction on the periphery of the PST wall for the moving of the nylon tyred wheels shall also be provided. Traction drive shall be driven by 1440 rpm and of required HP MOTOR. The sludge from the sump shall be hydrostatically withdrawn by means of D.I. pipeline of diameter not less than 300mm. This pipeline shall be provided in the chamber constructed near PST. Tee shall extend 0.6 m above TWL. The sludge shall be withdrawn and carried to sludge sump of raw sludge pump house. A bridge shall be provided to have access to the central rotating mechanism. All necessary arrangement for resting the MOTOR for driving the scraper bridge, M.S. sections for running the cables etc. shall be provided.


78


Civil Designs

Bypass from distribution chamber of aeration tank: A bypass channel of suitable size having peak flow capacity of 114.75 mld shall be constructed from distribution chamber of aeration tank to plant bypass. A penstock gate of suitable size shall be provided at the opening for the bypass. Aeration tank : The secondary treatment shall be based on conventional activated sludge process consisting of aeration tank with conventional surface aeration system. Two nos. rectangular aeration tank shall be provided and designed for total-average flow of 114.75 mld capacities plus flow of 25% return sludge, flow of supernatant, filtrate & excess sludge. The flow into the aeration tank shall be received through the distribution chamber ahead of aeration tank. Penstock gates of suitable size shall be provided to control flow to feed channels of AERATION TANK. Sizing with RLs is given below. Hydraulic retention time…… 6.0 Hours minimunm at average flow plus other returned flows Size………………………… 36.00 m. x 72.00 m. x 3.15 m.depth at TWL (inlet side) Nos………………………… 2 nos. Free board………… ……… 1.00 m. Top water level of tank(TWL)… RL. 128.45 m. Top of side walls……………… RL. 129.45 m. Top of central common wall ..… RL. 129.95 m.(minimum) Top of aerator platform………… RL. 129.95 m.(minimum) Top of all passages……..……… RL. 129.95 m.(minimum) Floor level at inlet side wall …… RL. 125.30 m. Floor slope toward outlet side wall. as required Top water level of inlet launder …. RL. 128.60 m. (minimum) Top water level of outlet launder … RL. 128.30 m. (maximum) Aerators of required H.P (total) in multiple of four for proper distribution of oxygen (air) shall be provided the aeration tank, which shall be supported on RCC platform supported on columns & beam, shall be accessible by means of 1200 mm wide walkway. The aeration tank shall be divided into 2 compartments each with suitable sections shall be provided with aerators of suitable H.P As per the tentative design 16 nos. of surface fixed type aerators each of 25 HP is worked out. Each radial flow low speed aerator shall comprise: Suitable HP electric motor, 1440 rpm, TEFC type, IP 55 PROCTECTION, CLASS F insulation, vertical flange mounted. Aerator duty HELICAL GEAR BOX with service factor of 2, drywell arrangement on output shaft to make it oil leak proof, integrally cast MOUNTING BLOCKS WITH CASTING to facilitate aerator cone immersion adjustment in water. AERATOR CONE of appropriate technical design statically balanced along with DRIVE TUBE in mild steel, sand blasted epoxy painted construction. Cone speed shall be nearly 55 rpm and shall not exceed 60 rpm. MOUNTING STUDS and FASTENERS shall be in mild steel galvanized construction. After aeration flow shall discharge over outlet which shall be provided with adjustable FRP weir to adjust the TWL in aeration tank within range of 100 mm. At the outlet end, suitable baffles of Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

79


Civil Designs

adequate size shall be provided to dampen the waves in tank due to aerators. From the outlet weir which shall be adjustable type the mixed liquor shall flow into a common channel from where main channel shall be taken to distribution chamber of secondary settling tanks. Some portion of activated sludge shall be returned to the inlets of each of two compartments of the aeration tank through D.I. pumping main of suitable diameter. This shall run parallel to the wall of the aeration tank & shall be provided with necessary cross connections, bends & sluice valve to control the return of activated sludge into each section of aeration tank. For washout/ scour purpose 450 mm dia pipe with valve of same size with necessary valves and chamber for each compartment up to plant bypass line by gravity flow shall be provided. Distribution chamber for secondary settling tank: The mixed liquor from outlet of the aeration tank shall be distributed into secondary settling tank through distribution chamber. The distribution chamber shall be provided with two nos. C.I. penstock gets of suitable size for dividing & isolating the flow to the secondary settling tank. Secondary Settling Tank: Two numbers, circular secondary settling tank with shall be designed for a total average flow of 51 mld plus return sludge of 25% of the average flow, flow of filtrate from sludge of drying beds, supernatant from sludge digester and excess sludge. In calculating detention period, the volume of hopper bottom shall not be considered. The hopper bottom slope shall be 1 vertical to 12 horizontal towards center. Indicative sizing with RLs is given below. Hydraulic retention time……… 2.00 Hours minimum at average flow plus other returned flows Size…………………………… 35.00 m. dia. x 3.50 m.depth of side water Nos…………………………… 2 nos. Inner dia of RCC central inlet pier.. 2.50 m. Inner dia of central feed well…. 5.00 m. to 5.50 m. (i.e. FRP deflector box) Floor level at side wall base…. RL. 124.45 m. Floor slope toward center……. 1 : 12 Free board………… ………… 0.50 m. minimum Top water level of tank………. RL. 127.95 m. Top water level of launder …… RL. 127.80 m. maximum Top of wall…………………… RL. 128.45 m. Type of launder……………….. Double weir type Central pier bottom level………RL. 121.53 m. RCC Central pier top level…… As required (minimum RL 128.75 m.) In calculating detention period, the volume of hopper bottom shall not be considered. The hopper bottom slope shall be 1 vertical to 12 horizontal towards center. The RCC NP4 feeder pipe from distribution chamber shall enter in bottom of settling tank and terminate into central feed well. Required openings of suitable size in the inner face of the central pier shall be provided the central pier shall extend above TWL so that the scrapper bridge mechanism can easily be installed. Entry port shall be submerged 0.3 m to 0.6 m below TWL. A platform all around the central pier shall be provide. The diameter of central feed well shall be 15 % of the diameter of PST, this shall extend 25 Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

80


Civil Designs

mm below maximum TWL and 1.5 m below maximum TWL. Deflector box shall be hung from the central pier. Peripheral launder of each settling tank shall be designed for peak flow of 114.75 MLD while designing the peripheral launder half the peak flow shall flow in clockwise direction and half shall flow in anticlockwise direction, meeting at a point on periphery and flow shall be from upstream to downstream of the 0.75 m. velocity in the launder shall be minimum of 1.0 m/sec at peak flow. Free fall from the launder shall not be less than 50 mm with respect to launder crest. Effluent from the peripheral launder shall be collected at outlet of the settling tank from where through chamber it shall be conveyed to distribution chamber of the aeration tank. A series of 90° FRP V Notch shall be provided all along around the periphery of the weir for uniform distribution of flow. Thickness of FRP plate shall be minimum of 6 mm. The height of the V notch shall not be lass then 75 mm. Clearance between two V notch at top shall not be less then 50 mm. Bottom of the V notch shall be minimum 25 mm. Above the crest of the trough. It should be possible to adjust the V notches within the range of 50 mm. V notches shall be fitted on weir by providing rag bolts made of stain less steel. A C.I. telescopic sludge draw-off valve of 300 mm dia. shall be provided. The sludge deposited at the bottom of the settling tank shall be collected in the sump provided near the mechanism by scrapper mechanism. The scrapers shall be hung from the bridge and shall have neoprene squeezes at the lower end for matching the slope. Slip ring collector shall be provided over central bearing at central point for current distribution to traction drive. All parts of the mechanism shall be sand blasted and epoxy painted. Peripheral driven SST mechanism suitable for the designed/approved tank size, comprising half bridge of 1.0 m. width with chequered plates and handrails, supported on central pier top at central end on center pivot bearing and driven by traction drive fitted with mild steel wheels at peripheral end shall be provided. Groove for the traction on the periphery of the PST wall for the moving of the nylon tyred wheels shall also be provided. Traction drive shall be driven by 1440 rpm and of required HP MOTOR. The sludge from the sump shall be hydrostatically withdrawn by means of D.I. pipeline of diameter not less than 300mm. This pipeline shall be provided in the chamber constructed near PST. Tee shall extend 0.6 m above TWL. The sludge shall be withdrawn and carried to sludge sump of raw sludge pump house. A bridge shall be provided to have access to the central rotating mechanism. All necessary arrangement for resting the MOTOR for driving the scraper bridge, M.S. sections for running the cables etc. shall be provided. Treated sewage from the secondary settling tank shall be discharged into chamber and a pipeline leading to final disposal point. Sludge digester: Two digester each of requisite effective capacity (below the TWL) shall be provided with steel dome. TWL shall be at the bottom of the ring beam. Bottom hopper shall have slope of 1 vertical to 4 horizontal.


81


Size……………………………

Civil Designs

21.00 m. dia. x 11.00 m. ht.of side wall excluding dome with unconfined gas mixing

Nos…………………………… 2 nos. Floor slope toward center……. 1 : 4 Each digester tank shall be provided with DI/ C.I piping, specials, equipment etc. as per requirement of design. Minimum of the 200-mm. dia. D.I. sludge feeder main from top with sluice valves to individual digesters. Sludge withdrawal D.I pipeline shall be of minimum 300 mm diameter. The pipeline shall be provided with necessary valves and fitting as required. The pipeline shall start from the center of the hopper portion. It shall be connected with the RCC overflow chamber provided below ring beam level. Down take pipe of min 300-mm. diameter from this chamber to sludge drying beds shall be provided. One sluice valve with ‘Y’ shape tee connection having blank flanges shall also be provided in the sludge withdrawal pipeline for each digester for back pressure application/rodding for opening of chockages etc. The RCC overflow chamber as stated above shall be used for sludge withdrawal and second portion for supernatant withdrawal. Necessary bends, valve, fitting etc. shall be provided. Supernatant withdrawal D.I. pipeline 200 mm (min.) diameter with ring for adjusting the levels shall terminate into the overflow chamber below the ring beam of the digesters and from this chamber another down take pipe of min 300 mm diameter shall be connected to a common header which leads to the distribution chamber of primary settling tank. Necessary bends/specials valves shall be provided. C.I. gas line of minimum 150 mm diameter with a pressure gauge on the top of digester shall be provided with gas tight/gas leak proof valves of standard make (as per details of E&M specifications). It shall be connected to a common header of minimum 150 mm leading to the gasholders. The C.I. pipelines shall be provided with drip traps at suitable elevations. The grip traps shall be provided with suitable disposal arrangements. Each digester shall be provided with inspection manhole suitably located on the dome and having removable covers and shall be leak proof. Two-manhole opening of 1.2 m dia each shall be provided in the vertical wall just above formation level. The mixing of digester contents shall be done by injection compressed gas drawn from the gasholder. The digester shall work as constant level tanks. Whenever fresh sludge is added, equal quantity of supernatant & sludge shall overflow.

The

digester

shall

be

tested

both

hydraulically as well as pneumatically with compressed air to withstand a pressure of 250 mm water gauge to ensure no leakage of gas. Gas holder (single stage bell) : There shall be two wet seal gas holder of suitable effective gas holding capacity. Volume is calculated from TWL in RCC tank during raised position to the springing level of bell. In calculating the effective capacity the volume of dome portion of bell shall not be considered. The volume location shall consist of the following. Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

82


Size……………………… Nos………………………

Civil Designs

17 m dia, 6 m ht. excluding dome portion 2 nos.

A circular RCC tank of adequate diameter and height to accommodate ladder between steel bell and RCC wall shall be provided with RCC floor, partly below ground level. In raised position of steel bell the top water level in RCC tank shall be 500 mm above the bottom of the bell. A free board of 500 mm above TWL in RCC tank shall be provided the RCC tank shall have a walkway all around the tank. A balcony of 1.5 m x 1.5 m with a staircase shall be provided. A steel bell of circular cylindrical shape for gas storage shall be provided. The gasholder shall be having gas inlet & outlet pigpens. Control valves, vacuum and pressure relief valve with flume arrestors. There shall be a C.I. gas header coming from digester to feed the gasholder tank. Provision shall be made for burning the gas by connecting gasholder outlet pipeline to the burner. Connection from outlet shall also be made to compressor to compress gas. The compressed gas shall be supplied to different digester through main/branch pipelines for mixing of digester content. Adequate number of valves shall be provided as required for control. The outlet pipe from gasholder shall also supply sewage gas to compressors to run the burner/ dual-fuel engine. Outlet from gasholder shall have adequate diameter to serve the above requirement. The entire control valve provided for gas holder shall be housed inside chamber at suitable elevation from formation level. Drip traps shall be provided on gas lines entering into and coming out from gasholder with suitable draining arrangements at suitable elevation. The gasholder shall be provided with RCC open stepped staircase to have access from the formation level up to the top RCC tank of the gasholder. At the top of the RCC wall of the tank, platform and a balcony with G.I. vertical pasts one meter high suitably spaced along the periphery of the tank. Necessary water connection for filling RCC tank of gasholder shall be provided by the department near the tank. The contractor shall provide necessary arrangement for filling the tank. The gasholder shall also be provided with PVC sheet fixed on one of the guide girder of the gasholder. The PVC sheet shall have graduations marked, to indicate the level. An alarm system shall also be provided. Necessary opening of size 1.2 m dia in the vertical wall at the formation level for clear access to gasholder. An overflow pipe at suitable elevation having adequate diameter shall be provided and connected to nearest natural drain. Gas meter : The gas flow meter having adequate capacity of reputed make as approved by the department for measuring gas shall be provided and installed in the digester control room. Gas burner: Adequate number of gas burners (minimum 2 nos.) Shall be provided to burn all the gas generated in one day.


83


Civil Designs

Sludge drying beds : Suitable no. of drying beds shall be provided for the open drying. The size of each bed shall be 20m x 20m. The filter media shall consist of the following: First layer from top

255 mm thick clean coarse sand having effective size of 0.5 to 0.75 mm and uniformity coffle cient not more than 4.0

Second layer

75 mm thick of 25 mm size broke stone metal.

Third layer

75 mm thick 32 mm size broken stone metal

Fourth layer

75 mm thick of 75mm broken stone metal

Bottom layer

150 mm of 100-150mm stone soling.

Size…………… Nos……………

20.00 m. x 20.00 m. in plan (Brick Masonry Construction) 14 nos.

The under drainage system shall consist of brick masonry lateral drain at 6 m c/c of suitable size and slope. the filtrate

collection shall be carried into a central covered drain connected to a

chamber outside the bed. This chamber shall and lead eventually to the sump of he filtrate pump house. All the brick chamber in front of each draying bed shall be provided with precast RCC removable covers with lifting hooks. The brick masonry chambers on the filtrate pipelines shall be provided at interval of 30 m for inspection and cleaning. The top of the chamber shall be 0.6 m above formation ground level or road level. Manhole cover with lifting hooks and manhole with necessary C.I. rungs for access inside the chamber shall be provided. The sludge feed channel/ pipelines shall be 300 mm dia of cast iron and shall run over the partition or common walls. Necessary C.I. crosses/tees with valves shall be provided for feeding sludge in each drying bed. Provision shall be made for walkway to operate the sluice valves. The brickwork shall be widened at top to provide walking space to operate the sluice valves. The sludge shall be discharged at the center of each bed over a 75 mm thick precast concrete splash tray of size 1.0 x 1.0m laid on the sand bed. Necessary brick wall enclosure may be provided arums the platform. The bottom of the sludge drying bed shall be above the ground water table. Treated sewage line Common Chamber for collection of treated sewage Size ………………………… as required. Top Water Level……………. RL. 127.50 m. Nos………………………… 1 no. Treated Sewage Out Let pipe… 1100 mm dia. RCC NP-4 CLASS CI Sluice gate on Out Let pipe.. 1 no. of required size. Raw sludge pump house and control room : A raw sludge pumping station and control room for primary treatment unit shall be provided as shown in layout plan. The pumping station shall have wet sump and control room. All electrical and mechanical equipment shall be housed in pump house and control room. Size of dry well cum wet well …… (with central partition wall) live storage depth ………………… Height of dry well portion above GL Capacity of HOT crane…………….. Nos………………………………...

14.00 m. diameter 2.00 m. 4.50 m. 3.00 MT 1 no.


84


Civil Designs

Sludge from primary settling tank shall be withdrawn hydrostatically from the DI pipeline and will be collected in the wet sump of pump house. The sludge will be pumped into the digesters through D.I. pumping main of 200 mm diameter minimum into digester. Return sludge pump house and control room: Return sludge pump house with control room for final settling tank shall be provided as show in layout plan. The pumping station shall have wet sump and dry sump of required size and control room. All electrical, mechanical equipment shall be housed in pump house & control room. Size of wet well …….………… (with central dry well) Size of dry well …….………… Height of dry well portion above GL.. Capacity of HOT crane……….. live storage depth …………… Nos………………………………...

20.00 m. diameter 8.00 m. diameter 4.50 m. 3.00 MT 2.00 m. 1 no.

Sludge from secondary settling tank shall be withdrawn hydrostatically into the wet sump of pump house, from where the sludge will be discharged directly into aeration tank through pumping main. The excess sludge shall be discharged into raw sludge pump house. The return sludge admitted into aeration tank shall vary from 25% to 75% of the average flow. Control Room for Aeration Tank :A Control room of 12 m x 8 m as shown in layout plan shall be provided. All the necessary control required for operation of aeration shall be housed in the control rooms. Control Room for Digester, Gasholder and Gas Mixing arrangements: A control room as shown in layout plan shall be provided. All controls required for operation of digester, gasholder and gas mixing equipment shall be housed in this control room. Filtrate Pump house: A filtrate pump for filtrate from sludge drying bed shall be provided as show in layout plan. The pumping station shall have wet sump. All mechanical and electrical equipment shall be housed in this pump house. The filtrate shall be pumped through C.I. pumping main to distribution chamber ahead of primary settling tank. Substation Building: A substation building shall be provided as show in

layout plan. It shall

consists of following rooms: 1. LT Room 2. HT Room 3. Transformer yard, as required. Internal roads, Drainage water supply and waste water disposal: Internal roads (approx. 7000 sq m), culvert wherever required storm water drainage, water supply, sewerage and wastewater disposal shall be provided. One day of storage of the total water requirement for the plant and service water shall be provided along with piping and all allied facilities. Landscape: To add the aesthetic value and nurture the working environment, landscape forms very important part of the contract.

Objective of landscaping is to enhance oxygenation, aesthetic

appearance, creating an environment conducive for plant operators to work efficiently and attend the filth with minimum odour problem, plants emitting fragrance, and also ease of visitor to inspect all Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

85


Civil Designs

units. Landscaping shall include planting of suitable trees and development of grassed areas. Landscaping in general shall meet ecological and environmental conditions of the site. Plants selected near sludge drying beds shall have shade and fragrance to facilitate the manure removal personnel. Such fragrant trees ad shrubs include Saptaparni, Kadam, Parijat, Ixora, Champo and Borsalli. Shrubs like Bougainvillea and Kadvi mehndi shall be selected for fencing around PTU. Straight trees like Asopalav shall be planted around aeration tank. Boundary of the STP shall be covered with tall trees like Gulmohar, Neem, Ashoka, Peltophorum, Keshudo, Shirish, Eucalyptus, Garmalo, Arjun etc. Depending upon the availability of space, trees shall be planted in single, double to multiple rows in bunch of 5-10 trees. Trees flowering during the same season shall be planted together, alternating with each other depending upon the flower color. E.g. Combinations of 1) Peltophorum (Copper pods) and Gulmohar (Begins to flower in May/June) 2) Garmalo and Gulmohar (Both flower in May/June) 3) Keshudo and Garmalo (Both flower in April) 4) Keshudo and Peltophorum (Both flower in May/June) Road widths shall determine the size of the tree height and spread to be selected for planting. Trees suitable for local conditions shall be selected. Medicinal and fruit trees shall be avoided. To enhance aesthetic beauty, herbaceous flowering plants like Cosmos, Coreopsis, Tagetes (Galgota), Gaillardia etc. shall also be laid. Berm of the PST/SST shall be provided with grass turfing. Security Fencing and Gates for Transformer yard : Security fencing for the STP plot complex and associated works shall be of 2000mm high with 230/350 mm thick brick masonry, in cement mortar (1:6), with recessed pointing in cement mortar (1:3), on both the faces. There shall be concrete coping over brick/random rubble masonry wall and 750 mm high barbed wire fencing above it. Substation shall have internal fencing as per Gujarat Electricity Board (GEB) guidelines. 4.5m wide x 2.2m high main steel gates and 1m wide x 2.2 m high steel wicket gate made out of tubular sections/square bars/flats of welded construction along with the locking arrangement and posts to match with security fencing shall be provided at appropriate places. Gates shall be painted with similar synthetic enamel paint. *********


86


7

Mech & Elect Design

D Deettaaiilleedd E Ennggiinneeeerriinngg D Deessiiggnn-- M Meecchhaanniiccaall & &E Elleeccttrriiccaall

7.1 Necessity of Auxiliary Pumping Stations for Drainage Phase-III According to the details survey work of the project area, sewerage network have been planned and designed to collect the sewage from proposed project area to the main pumping station. To avoid greater depths of excavation, three auxiliary pumping stations have been provided to facilitate the initial collecting system for further transmission to the main pumping station for smooth and efficient maintenance. LOCATIONS OF AUXILIARY PUMPING STATIONS: Auxiliary pumping station No.01 is proposed to facilitate the areas of Mavdi village. Similarly, auxiliary pumping station No.2 is provided to facilitate T.P.No.08, 07, 03, 05 & part of 02 near by Kalavad road, in the plot of RMC authority near by A.G.Society situated on Kalavad road. Gandhigram area of T.P.scheme No.06 is found very flat and no advantage of natural slope is found for planning of sewers and therefore, an auxiliary pumping station No.03 is provided in this area to avoid greater depths of excavation of sewer line sections. MAIN PUMPING STATION: The main and final pumping station location has been proposed behind the village Raiya, which will take care to receive sewage flow from all the three proposed auxiliary pumping stations through transmission main. As per the design criteria, the capacity volume of wet well, invert of incoming sewer to the pumping station, transmission pipeline designed diameters, I.L. of manhole of receiving flow from each pumping stations and capacity of pumping machinery of proposed three auxiliary pumping stations and main pumping stations etc are shown in the following table. Wet well capacity of proposed pumping stations have been calculated with 30 minutes of detention period of average flow and the capacity of pumping machinery for deriving required pumps and motors is calculated for 2.25 peak factor with average flow as per the norms of CPHEEO Manual.

Detail Project Report for Drainage Phase II & III (Part-I) for Rajkot City

87


Mech & Elect Design

STATEMENT SHOWING THE DETIALS OF DESIGNED CAPACITY OF PUMPING STATIONS FOR RAJKOT SEWERAGE PROJECT PHASE-III

Sr No

Pumping station

1

APS-1 Mavdi

2 3

4

Average flow inlet 59

Incoming sewer I.L. 131.6

Retention time

Volume

30

107

APS-2 Klv.rd APS-3 TP-6

326

119.3

30

595

49

121.4

30

90

Main pumping station

588

116.75

30

1058

Wet well size

suction pit level

6 mt dia 3.80 mt H 21x8.1 x 3.5 6 mt dia 3.20 mt H 37 x 13 x 2.20

127.2

115.8


117.2

114.55

details of MH Receiving flow G.L. I.L. Dia mt mt mm

Length mt

TP-6 /600

138.67

136.29

400 CI

TP-4 /1238 TP6/729

130.09

127.5

131.81

129.81

STP basin

122.75

126 FRL

MH No

Designed head

Peak factor

Designed discharge

840

15

2.25

133

900 PSC 400 CI

1566

16.6

2.25

734

650

17

2.25

110

900 PSC 2 Nos.

1000

15

2.25

1323

88


Mech & Elect Design

STATEMENT SHOWING THE DETAILS OF DESIGNED PUMPS AND MOTORS FOR PUMPING STATIONS FOR RAJKOT SEWERAGE PROJECT PHASE-III

Sr No

Pumping station

1 2

APS-1 Mavdi APS-2 Kalavad Road aPS-3 TP-6 Main pumping station Raiya.

3 4

Head mt

Operative Nos

HP

2 4

Pumps No.pumps Q per standby pump in LPS 1 67 2 183.50

15 16.6

2 4

30 65

2 4

1 2

17 15

2 4

17 105

No.pumps operative

55 331


Motors standby Nos.

HP

Design load HP

Demand load KV

1 2

30 65

60 260

45.45 196.96

1 2

25 105

50 420

37.88 318.18

89


Mech & Elect Design

7.2 Criteria proposed for Mechanical works The selection of pumps and pumping main shall be based on the following criteria for designed head and discharge requirements a)

For large size pumping station, having peak flows more than 1 m3/sec, while provision will be made for automatic start and stop, system would be capable of being operated manually.

b)

Not more than tow starts and stops per hours will be considered for manual operation of pumps

c)

the need for one or more pumping mains will be decided from consideration of minimum velocity requirement and variation of head on the pumps.

d)

Mechanically operated screens for large APS and manually operated screens for small APS shall be provided before the wet well to prevent clogging of pumps

e)

Forced ventilation system shall be provided for terminal sewage pumping stations.

f)

Sewage level indicator for the wet well (Mechanical type) shall be provided for APS

g)

Depending upon capacity, depth, site conditions and ease in operation and maintenance either rectangular or circular configuration shall be provided.

h)

Depending upon configuration, either horizontal type or vertical type pumps will be selected. Consideration is given for submersible pumps for APS No.01 and APS No.03.

7.3 Criteria proposed for Electrical Aspects The following are the criteria considered for electrical works: a)

Power Distribution The distribution scheme will be based on the group of estimated loads for each sewage pumping station. This will comprise HT switch gear, transformer and LT switch gear.

b)

Motors: Induction motors suitable for 415 V, 50 Hz supply will be provided. They will either be of squirrel cage, or slip rig type with screen protected drip proof IP 23 construction depending upon the supply authority's conditions of power supply. Motors will be corrosion protected to meet environment likely to be encountered at sewage pumping station / treatment plant.

c)

Cabling HT cables will be XLPE or PILC insulated aluminum conductors with steel armour and overall PVC sheathing. cables used for power distribution at 415/240 v will be of aluminum conductor with PVC insulation, steel armour and overall pvc sheathing. xlpe insulated cables will be used where found beneficial in terms of current carrying capacity vis-à-vis termination requirement.

d)

Lighting The lighting system provided will comprise fluorescent lighting fittings in dry well and other indoor areas and post top lantern or swan neck type fluorecent fittings for outdoor areas.


90


Mech & Elect Design

Indoor as well as outdoor lighting when beneficial will be using energy efficient discharge lamp fittings. e)

Control Push button starter will be provided for manual start and stop of motors with specific concurrence from RMC automatic operation would be considered.

f)

Safety Earthing Earthing grid comprising mild steel conductors with adequate corrosion factor and suitably located GI pipes electrodes for safety earthing system will be provided. Conductors exposed to atmosphere will be galvanized to take care of atmospheric corrosion. whole installation shall be carried out as per IS:3043.

7.4 Pumping Mains of APS & MPS Various alternative for providing rising main from each APS have been examined considering the best suited located of Manhole of collective system and length and diameter of pumping main pipeline with category of pipe material for economic power consumption of all APS as well as MPS. For designed discharge 2.25 peak factor has been taken into account for smooth pumping during peak hours. Pumping main also have been designed for peak flow of the system for all pumping stations. Following table shows the details of all rising mains of the collective system of the project.

Pumping Station A.P.S.01 MAVDI A.P.S.01 KALAVAD RD. A.PS.01 GANDHIGRAM MAIN PUMPING STN. RAIYA

Diameter pipeline 400 MM

of Category & Length of pipe Flow receiving class of pipe in m. MH PSC class 840 No.600/TP-8

900 MM

PSC. 10 kg/cm2

1566

No.1238/TP-4

400 MM

PSC class

650

No.729/TP-6

900 MM P.S.C. twin LINE or kg/cm2 1300 dia single line

10 1000

FRL OF STP STILLING CHAMBER

********


91


Recommendations

R mm meennddaattiioonn Reeccoom

8 8.1 Issues and Performance Assessment

Followings issues are identified for drainage & storm water components a. Polluted Aji river b. Low Population coverage c. Use of natural water drainage for sewerage d. Use of open gutter and septic tanks due to inadequate drainage net work in merged area Performance Assessment of the Drainage System are identified as follow: Attributes Component Treatment % of Wastewater Treated Service Coverage % of Pop Covered by Underground Drainage % HH – area covered by Sewerage Under ground drainage Service Cost and Connection Cost per Efficiency Sewerage Connection Cost Recovery

Indicator Unit 55 % 60 % 55

%

500

Rs./ Conn. %

40

8.2 SWOT Analysis SWOT Analysis : Drainage STRENGTH • • • • • •

Rationale Planning Availability of Competent Expertise and Technical know-how Profound experience in the Operations of Systems in the Region Public support and cooperation Adequate availability of distribution networks and sewerage systems Efficient Capital Improvement Planning

WEAKENESS Lack of public awareness with respect to operations of RMC Topography of the city results in high capital investments Recovery of taxes and charges insufficient to support operation & maintenance Low tax rates/ water charges and Irregular revision of tax rates. No perennial water sources • Lack of awareness with regards to recycling and reuse of wastewater

• • • • •

OPPORTUN ITY • Private Sector Participation in the delivery of basic services • Capital Market /JnNURM fund is available to undertake urban infrastructure schemes

TRE ATS • • • •

Development Control Regulations not framed to facilitate infrastructure provision Ground/ Soil characteristics do not facilitate permeability and retention of water Low rainfall in the region Rapid urbanization of the region


92


Recommendations

8.3 Recommendation Following recommendations are recommended as follows:

Technical recommendations

•

1. To Carry out work under Phase- II ( Part-I) 2. To Carry out work under Phase- II (Part-II) 3. To Carry out work under Phase- III (Part-I) 4. To Carry out work under Phase- III (Part-II) 5. To develop storm water project Financial recommendations

•

1. To eliminate cross subsidy in the drainage service 2. To rise drainage tax every year by 25 % till fully sustainability 3. To increase scope of the privatization 4. To adopt following management options Management Options

•

Relying on current practice to deal with domestic wastewater treatment and its related problems in Rajkot is very complicated and difficult. Several changes have to be made immediately to provide satisfactory service and to stop further environmental deterioration. The domestic wastewater problems that require changes are: •

Community awareness

•

Waste water minimization and Water conservation:

•

Pricing and financing

•

Packaging of the water and waste water services:

•

Regulation and corporation

Community Awareness The success of any sanitation project is critically depends upon the effective advocacy of the project to the people and public awareness. Public awareness plays a very important role in success of sanitation project and especially where they have to pay for sanitation service. Many sanitation projects which are well designed but failed due to lack of public awareness and two way communication between the project designer and community and community events. Community awareness is still poor and the government is still too dominant to deal with the problems. Reliance on either the community or the government for solutions to the problem cannot achieve a desirable environment. Information and campaigns are needed to generate society consciousness to provide better environments. Transferring the information to people from diverse Detail Project Report for Drainage Phase-II & Phase-III (Part-I) for Rajkot City

93


Recommendations

background of the domestic wastewater problem is crucial. Visualizing the damage that will occur from wastewater problems has to be easy to understand by the entire community. Preventing pollution is better than solving the problems once it has occurred. Public awareness can be built through effective two way communication, advocacy of the projects through mass media, advertising and using people participatory approach in planning and implementation of the project.

Two way communication: In past it has been observed that in many projects which are designed at higher level are failed due to lack of two way communication. Now it has been recognized from the past experience that the top-down approach in recent policy must be changed to a partnership approach. Communication and cooperation from both the community and the Corporation are required. Communication and cooperation can be approached through community consultation. It can be achieved through open discussions between the Corporation and the community to raise community awareness. Before designing and implementing sanitation project, the direct and indirect benefits gained from the sanitation services should be reveal to the community through group meeting. In group meeting, the aims and goals to be achieved from the sanitation service should be discussed and suggestions are invited. According to suggestion and discussion held with group meeting necessary changes should be made. Advocacy planning. Advocacy consists of the organization of information into an argument to be communicated through various interpersonal, mass media and other stake holders. It is very necessary to gain political and social support for the success of sanitation system. Any other sanitation projects which are successfully implemented and benefit gained by the citizens in other city should be published, with a view to gain community and political support. Community participatory approach: Participatory approach in designing and implementation of any project is the best way to create public awareness. In participatory approach, stake holders are supported to analyse their own situation and to come up with solutions that are most suited for their situation. For success of participatory approach, it should be started with top most stake holder and then slowly involved the lower most stake holders. In this view participation from the community should be started from the top level such as political leaders, social leaders, NGOs and voluntary organizations to the individual. The participatory approach in sanitation projects should be carried out in following manner. •

First identify the top most stake holders such as political leader, community leader and NGOs who are working at grass root level.

•

Before designing a detailed sanitation project a meeting should be held with the top most stake holders and brief of the sanitation projects should be discussed. And suggestions are invited.


94


•

Recommendations

According to discussion and suggestion made by the top most stake holders, necessary changes should be made and detail design of the project planning should be carried out.

•

After designing the project, the aim, goals to be achieved through the sanitation services should be display for the public.

•

Also ward wise meeting with the people should be held with the help of the community as well as political leaders and NGOs. In the meeting general brief of the project including financial aspects are discussed and suggestions are invited.

•

After receiving the suggestions, a general meeting should be held to discuss the suggestions made by the people and necessary changes should be made. Also in general meeting financial aspects are discussed in detail. Because for any project cost recovery is more important and also it is very sensitive issue for community as well as politicians if people have to pay for the service that they will receive.

•

In this context, alternatives regarding following issue should be given to the community members

•

o

Technology and service level option based on willingness to pay and affordability,

o

Whether to participate in the project,

o

When and how the service are delivered,

o

How their services are operated and managed

o

How funds are managed and accounted for

After making appropriate selection implementation of the project should be carried out.

Community events: Community events are also helpful in creating public awareness. Community events like environmental day/ sanitation day should be celebrated with involving the community as active participant. If possible environment and living condition improvement through sanitation improvement should be coupled with the community festivals. To motivate and increase the awareness of people regarding environmental and sanitation improvement, competitive situation should be developed among the different part of the city. Seminars regarding the environment improvement should be arranged periodically and people are allow to take participation freely. Waste water minimization and Water conservation: Rajkot city always face water scarcity so it is necessary for Rajkot Municipal Corporation to formulate the strategy that promotes water conservation. Water conservation reduces the volume of sewage requiring collection and treatment. The benefits of water conservation include reduced cost of facilities for water supply and wastewater treatment, and reduced impacts in the region from which surface or ground water supplies are abstracted.


95


Recommendations

Conventional off-site wastewater treatment systems are generally capital-intensive and require expertise for operation and specialised operators. It is therefore preferable to investigate options to reduce wastewater production, before investing in wastewater treatment technology. Waste water minimization aims at the reduction and prevention of waste water at the source and minimises the use of resources and reduces the waste discharged into the environment. It consists of practices that reduce the use of water, energy, and other natural resources at source.

Reducing domestic water consumption is a very effective way to reduce sewage volume and makes treatment cheaper. Demand management, water saving technologies in households and for example, re-using grey wastewater for toilet flushing may yield significant reductions in required sanitation capacity.

*******


96


Cost Estimate

C Coosstt E Essttiim maattee

9 9.1 General

Preliminary cost estimates for various components of proposed Drainage projects are presented here. The proposed works are divided in phase wise manner and it is scheduled to complete within seven years. The proposed works are categorized as follows: Work under Phase-II (Part-I) 1. The work of collective system with house connection in remaining area Phase-II part-I 2. Installation of pumping machinery for additional load 3. Extension of existing sewerage treatment plant by 44.5 MLD 4. Power connection 5. Compound wall & area development at STP Work under Phase-III (Part-I) 6. Collective system and house connection 7. Construction of STP of capacity 51 MLD disposal work 8. Pumping station with pumping machinery and pumping main 9. Purchase of equipment and Misc work

9.2 Based for Cost Estimate 1.

Collective system/ Development of site office / Compound wall/ Pumping stations or Infrastructure development work

Based on the Rajkot Municipal Corporation Schedule of

Rates (SOR) - 2005 the rates are adopted to get abstract sheet. The measurement sheets for each idea are prepared as per the standard civil engineering practice. The specifications for the works shall generally conform to the stipulations made in “Specifications for Road and Bridge Works (Itch Edition – August 2000)” of MORT&H. For the purpose of analysis the rates of materials, labour and machineries has been determined as: 1.

The Hire Charges of Plant and Machineries as approved by the MOST&H are given in the updated data book and the same has been adopted. For the plant & machineries used in the analysis but not covered in the data book, prevailing market rates have been adopted wherever considered appropriate.

2.

Updated rates of material, labour and machineries has been further verified with the market rates and was found to be at par with the market rates.

3.

The overhead charges include the following elements:

Site accommodation, setting up plant, access road, water supply, electricity and general site arrangements.

Office furniture, equipment and communications


97


Expenditure on safeguarding environment.

Sundries

Financing Expenditure

Sales/Turn over tax

Cost Estimate

Work Insurance/compensation Contractor’s profit has been taken uniformly as 10 %, over the cost of items 2. Development of new STP: Based on the actual market rate a unit cost of Rs.22 Lakhs /MLD has been adopted for treatment plants on actual (recently contracted other similar work by Rajkot Municipal Corporation Electrical & mechanical works at pumping stations, an average cost rate of Rs.25000/KW has been adopted on basis of experience on similar jobs. 3. SW/RCC/PS pipes : It has been finalized to use Stoneware Pipes / RCC pipe or PS pipes. The present prevailing rates of all these pipes are adopted from the rate contract of GWSSB. And the rest of labour work Rajkot Municipal Corporation current SOR is being followed.

9.3 Cost Estimate for Phase-II (Part-1) ABSTRACT OF COST ESTIMATE FOR PHASE-II (PART-1) Sr No 1 2

3 4 5

Name of the component

Estimated cost in Rs. Lakhs

Collective system and house connections 600 Installation of additional non-clog C.F. pumping 285 machinery in existing pump house - total no. of sets 9 a) Popatpara main pumping station 1200 cu mt per hour against head of 42 mt 4 sets. b) Bedipara pumping station 480 cu mt per hour against head of 23 mt 2 sets c) Bedinaka pumping station 950 cu mt per hour 17 mt head 2 sets d) Housing Board pumping station 350 cu mt per hour 13.5 mt head 1 set Extension of sewage treatment plant with extended 1120 aeration process with sludge digester 44.5 mld capacity. Additional power connection at Madhapar plant 30 Compound wall at Madhapar plant 15 2050 Total Rupees Twenty Crore Fifty Lakhs Only/-

______________ City Engineer Rajkot Municipal Corporation


98


Cost Estimate

Name of Work :Providing, lowering, laying, jointing and testing work for collective system along with house connection system under Phase-II Part-I work of underground sewerage project of Rajkot in for remaining areas of old city. Item Qty Item Rate Per Amount No. 1.0 Excavation for sewer line trenches, manholes incl. All safety provisions using site rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90mt as directed. 1.1 UP TO 1.50mt depth 1.1.1 118993 In all sorts of soil and soft murrum, hard 39.50 M3 47,00,223/murrum, boulders, and macadam road. 1.1.2 11855 In hard rock and soft rock 135.00 M3 16,00,425/1.2 1.50mt to 3.00mt 1.2.1 6156 In all sorts of soil and soft murrum, hard 47.50 M3 2,92,410/murrum, boulders, and macadam road. 1.2.2 8032 In hard rock and soft rock 166.50 M3 13,37,328/1.3 3.00mt to 4.50mt 1.3.1 205 In hard rock and soft rock 199.50 M3 40,897/1.4 4.50mt to 6.00mt 1.4.1 In hard rock and soft rock 252.50 M3 2.0 7274.00 Providing C.C. bedding in 1:3:6 (M 100) M3 85,10,580/1170.00 using 12 to 20mm machine crushed metal incl. Consolidation curing etc. complete. (C-type bedding as per type design) 3.0 Providing, supplying, lowering, laying and jointing Stoneware pipes in C.M. 1:1 of following diameters in proper position grade and alignment as directed by Engineer-in-charge including labour, giving necessary testing etc., complete including cost of jointing materials including all the taxes, duties, freight, insurance etc. complete. 3.1 57490 For 100mm dia Stoneware pipes 85.00 RMT 48,86,650/3.2 51300 For 150mm dia Stoneware pipes 130.00 RMT 66,69,000/3.3 2360 For 200mm dia Stoneware pipes 190.00 RMT 4,484400/3.4 1026 For 250mm dia Stoneware pipes 280.00 RMT 2,87,280/3.5 500 For 300mm dia Stoneware pipes 390.00 1,95,000/Providing and constructing house 4.0 connection chambers as per type design in brick masonry in C.M. 1:4 and inside plastering in C.M. 1:3 necessary coping in C.C. M-200 and fixing of RCC frame and cover (But excluding supply of frame and covers) over house connection chambers etc., complete (excluding excavation) as per stipulation in the type design complete. 4.1 1126.00 House connection chamber as per type 770.00 Nos. 8.67.020/design (Depth upto 0.60 mt.)


99


Item No. 4.2

Qty

Item

8390.00

House connection chamber as per type design (Depth above 0.60 mt and upto 1.0 mt.) Providing and constructing Sewer manholes, scraper manholes as per the type design in brick masonry in C.M. 1:4 and inside and outside plastering in C.M. 1:3 necessary coping in C.C. M-200 fixing C.I./ reinforced plastic Steps and fixing manhole frame and covers (But excluding supply of manhole frame and covers) over manholes/ scraper manhole etc. complete, as per the stipulation in the type design complete.(Excluding excavation) Manhole type "A-1" Circular type having inside diameter of 900 mm for depth upto 1.00 mt. Manhole type "A-1" as above but upto 1.00 mt. depth. Manhole type “A” circular type having inside diameter of 1200mm for depth up to 1.5m depth. Manhole type “A” as above but up to 1.0 M depth Extra depth beyond 1.0 M but up to 1.5M depth for “A” type manhole above Manhole type “B” circular type having inside diameter of minimum 1500mm and for depth from 1.5M to 4.0 M. Manhole type “B” as above but up to 1.5 M depth.

5.0

5.1

5.1.1

256

5.2

5.2.1.

1026

5.2.2

103

5.3

5.3.1.

646.00

5.3.2

462.00

5.4

5.4.1

5.00

5.4.2

5

6.0

6.1

Cost Estimate

102

Rate

Per

Amount

1000.00

Nos.

83,90,000/-

1550.00

No.s

3,96,800/-

2640.00

Nos.

27,08,640/-

1632.00

RMT

1,68,096/-

4960.00

Nos.

32,04,160/-

2604.00

RMT

12,03,048/-

15456.00

Nos.

77,280/-

4068.00

RMT

20,340/-

708.00

Nos.

72,216/-

Extra depth beyond 1.5M but up to 4.0 M depth for type “B” manhole above. Manhole type “C” circular type having inside diameter of minimum 1500 mm and for depth 4.0 M to 6.0M Manhole type “C” as above but up to 4.0 M depth. Extra depth beyond 4.0 M and up to 6.0M depth for type “C” manhole above. Providing constructing vertical drop arrangement of 0.6 m and more height as required including providing and jointing special such as double T.Bend required Stoneware pipe fixed in M-100 C.C. at required level as type design cutting jointing and filleting as per specification etc. complete. Vertical drop arrangement as above up to 0.6 M height.


100


Item No. 6.2

102

7.0

47311

8.0

9515

9.0

1282

10.0

556

11.0 11.1

Qty

11.2

49248.0 0 5130.00

12.0

7797.00

Cost Estimate

Item

Rate

Extra over Item No.6.1 above for additional drop beyond 0.6 M. Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits including transportation, loading, unloading, spreading etc. complete Providing, supplying RCC pre-cast manhole frame and covers 5 T.M.D. as per specifications Providing, supplying R.C.C. Pre-cast manhole frame & covers 10 T.MD. as per specifications. Providing, supplying R.C.C. Pre-cast manhole frame & covers 20 T.MD. as per specifications. Breaking of pavement surface Conventional asphalt surface

Per

Amount

552.00

RMT

56,304/-

33.00

M3

15,61,263/-

600.00

1 Pair

57,09,000/-

690.00

One pair

8,84,580/-

900.00

One pair

5,00,400/-

18.00

Sq. Mt

8,86,464/-

Paver asphalt surface

26.00

Sq. Mt

1,33,380/-

Making holes in manhole with repairing complete

20.00

Nos.

1,55,940/-

Total Rs.5,99,99,124/Say Rs.6,00,00,000/(Rupees Six crores only)



101


Cost Estimate

Name of work:-Augmentation of Drainage Pumping Machinery S.E.T.C. of Non-Clog Pumping Machinery. :: A B S T R A C T FOR ESTIMATE STATE-II (PART-I) :: Item Qty. Short Description of Rate Unit Amount S.O.R. No. work. In Figure Rs. Ps. Number S.E.T.C. of Non-clog sewage pump set along with suitable motor starter panel with all associated accessories like voltmeter-Amp meter SPP O/L Relay its cabling earthing etc. Manifold as per requirement of DI pipes and specials S.V.- H.R.V. with erection, testing, commissioning for pump sets, duty point of which is as mentioned below. 1 2 sets MR 150 KW Bedinaka-C 950 m3/hr 17 mt head 75 KW motor x 2 = 150 KW 2 2 sets MR Bedipara-F 90 KW 480 m3/hr 23.0 mt head 45 KW x 2 = 90 KW 3 1 set MR Housing Board-B 22 KW 350 m3/hr head =13.5 mt 22 KW -1 4 4 sets MR 880 KW Popatpara-I 1200 m3/hr - 42 mt 220 KW x 4 = 880 KW Total 1142 25000/- KW 2,85,50,000/- MR KW Say 2,85,50,000/-



102


Cost Estimate

Name of work:-Construction of pre-cast RCC compound wall around Sewage Treatment Plant at Madhapar. :: A B S T R A C T FOR ESTIMATE :: Stage-II Part-I Item Qty. Short Description of Rate Unit Amount S.O.R. No. work. In Figure Rs. Ps. Number 1

2500.00 Rmt

2

145.00 Cu. Mt

3

145.00 Cu. Mt

4

2500.00 Rmt

5

150.00 Cu. Mt

Providing and fixing pre-cast RCC column and slab as per specification complete (including the cost of transportation) Excavation in soft and hard murrum upto 1.50 mt depth complete. Cement concrete work for fixing the columns in 1:2:4 proportion using 1.5 to 2.0 cm size coarse agg., curing etc. complete. Fixing present RCC column and slab in line and level, jointing the same with cement paste as per specification, curing etc complete. Supplying of hard murrum and spreading the same as per instruction complete.

456.00

Rmt

11,40,000/- MR

39.50

Cu mt

1450.00

Cu mt

2,10,250/- 62

74.00

Rmt

1,85,000/- MR

55.00

Cu mt

Total Say

5727-50 23+28 2

8250/- 702

14,99,227-50 15,00,000-00 (Rupees Fifteen lacs only)

___________ City Engineer Rajkot Municipal Corporation


103


Cost Estimate

Drainage Phase-II (For Old City Area) (PART-I) DESIGN, CONSTRUCTION, PROCUREMENT, MANUFACTURE, SUPPLY, STORAGE AT SITE, ERECTION, TESTING AND COMMISSIONING OF ALL MECHANICAL AND ELECTRIC EQUIPMENTS, INSTRUMENTATION AND ALL PIPINGS ETC COMPLETE FOR SEWAGE TREATMENT PLANT OF 44.5 MLD CAPACITY TO BE CONSTRUCTED NEAR EXISTING SEWAGE TREATMENT PLANT AT MADHAPAR. Sr No 1

2

Qty

Description

Work of design, engineering, 44.5 supply of materials, MLD construction, erection and cap. installation of equipment, machinery, piping, instruments, painting works, including civil and structural work, and testing and commissioning successful 3 months trial runs and training RMC operating personnel. Operating and maintaining the sewage treatment plant proposed near existing sewage treatment plant at Madhapar for 12 months including guaranteeing the entire plant and its performance and treated effluent quality, all labour, materials, piping, instruments, etc complete as per scope of work, special conditions of contract, design, drawings and specifications approved by the department and as per directions of Engineer-in-charge. 6000 Construction of internal road Sq. mt Total Estimated Cost in Rs

Rate

Unit

2500000/- 1 MLD

125/- sq mt

Amount

11,12,50,000/-

7,50,000/11,20,00,000/-

Say Rs. in Lakhs 1120/Rupees Eleven Crore twenty lakhs only/-

Detailed break up of cost of Sewage Treatment Plant 1. Civil works Rs. 18.23 Lakh per MLD 2. Mechanical / Electrical/ Automation work Rs. 5.85 Lakh per MLD 3. Piping work Rs. 0.92 Lakh per MLD -----------------------------Total Rs.25.00 Lakh per MLD ___________ City Engineer Rajkot Municipal Corporation


104


Cost Estimate

9.4 Cost Estimate for Phase-III (Part-1) SUMMARY OF ESTIMATED PROJECT COST Sr. No. 1

2

3.

Description

Rs. in Lakhs

1860.76

Collective System a. TP scheme – 1 (Part – I)

158.87

b. TP scheme – 1 (Part – II) & TP

504.00

scheme- 4 c. TP scheme – 6

227.40

d. TP scheme – 2

118.61

e. TP scheme – 3

185.72

f. TP scheme – 5

179.14

g. TP scheme – 7

97.42

h. TP scheme – 8

258.00

i. Slums (Mavdi)

131.60 1404.59

House Connections a. TP scheme – 1 (Part – I)

163.16

b. TP scheme – 1 (Part – II) & TP

303.45

scheme- 4 c. TP scheme – 6

162.65

d. TP scheme – 2

131.65

e. TP scheme – 3

137.76

f. TP scheme – 5

111.57

g. TP scheme – 7

61.89

h. TP scheme – 8

233.65

i. Slums (Mavdi)

98.81 293.06

Pumping Stations ( Civil works) a. APS – 1 (Mavdi)

18.32

b. APS – 2 (Kalawad Rd.)

142.51

c. APS – 3 (Gandhigram)

21.09

d. MPS (Raiya ) 4.

Total Rs. in Lakhs

111.14 139.60

Rising Mains ( Pipe lines- of PS) a. APS – 1 (Mavdi)

11.77


61.38


9.32

d. MPS (Raiya )


57.13

105


Sr. No. 5.

Description

Cost Estimate

Rs. in Lakhs

245.25

Pumping Machinery & Erection a. APS – 1 (Mavdi)

22.50


78.00


18.75 126.00

d. MPS (Raiya ) 6.

Sewage Treatment Plant & Disposal a. 51 MLD STP

Total Rs. in Lakhs

1328.81 1275.00

b. Outfall pipelines

Total Add 5% Contingency charge TOTAL Say Rs.

53.81 5272.07 263.60 5535.67 5536



106


Cost Estimate

9.4.1 Estimates of Collective System of Phase-III (Part-1) BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 1 part 1, T.P. 1 No.

Qty

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1 2

22970 9850 5420 5420 1820 70

1160 3

3.1.1 3.1.2 3.1.3 3.1.4

18900 930 290 390

3.1.5 70 3.1.6 210 3.1.7 260 3.1.8 290

Item Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard murrum, boulders, & macadam roads. in hard rock & soft rock 1.50 to 3.00 mt. depth in soft soil & hard murrum in hard rock & soft rock 3.00 to 4.50 mt. depth in hard rock & soft rock 4.50 to 6.00 mt. depth in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. for 150 mm dia SWG pipes for 200 mm dia SWG pipes for 250 mm dia SWG pipes for 300 mm dia RCC & NP-3 class pipes for 350 mm dia RCC & NP-3 class pipes for 400 mm dia RCC & NP-3 class pipes for 450 mm dia RCC & NP-3 class pipes for 500 mm dia RCC & NP-3 class pipes

Rate

Per

Amount

SOR No.

39.5 135

M3 M3

907315 1329750

23+28/2 33+38/2

47.5 166.5

M3 M3

257450 902430

24+29/2 34+39/2

199.5

M3

363090

35+40/2

252.5

M3

17675

36+41/2

1170

M3

1357200

616/2

130 190 280

RMT RMT RMT

2457000 176700 81200

855/3 855/4 855/6

256

RMT

99840

906

602

RMT

42140

918

638

RMT

133980

919

707

RMT

183820

920

853

RMT

247370

921

1133

RMT

135960

921-A

3.1.9 for 600 mm dia RCC & NP-3 class 120 pipes


107


No.

Qty

Cost Estimate

Item

4

4.1

4.1.1 411 4.1.2 60 4.2

4.2.1 302 4.2.2 260 4.3

4.3.1 4 4.3.2 1 4.4

4.4.1 3 4.4.2 6

Providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design complete (excl. excavation) Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. Manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia sewer) Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. Scraper manhole pipe "SI" rectangular type for 600 mm dia to 1200 mm dia sewer pipes & for depth 2.5mt. To 9.0 mt. Scraper manhole pipe "SI" as above but upto 2.5 mt. depth Extra depth beyond 2.5 mt. & upto 9.0 mt. depth for type "SI" scraper manhole as above.

Rate

Per

Amount

SOR No.

2640

NOS.

1085040

608/1

1632

RMT

97920

608/2

4960

NOS.

1497920

608/3

2604

RMT

677040

608/4

15456

NOS.

61824

608/5

4068

RMT

4068

608/6

15240

NOS.

45720

610/1

4596

RMT

27576

610/2


108


No.

Qty

5

5530 6 543 7 180 9 9.1 9.2 10 10.1 10.2

7822 7822 23702 15643

Cost Estimate

Item Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 10 T,MD Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 20 T,MD Breaking of pavement surface Conventional Asphalt surface Paver Asphalt surface Re- instating the road surface WBM Asphalt

Rate

Per

Amount

182490

SOR No.

33

M3

712

690

1 PAIR

374670 659+660

900

1 PAIR

162000 666+668

18 26

M2 M2

140796 203372

43 44

55 85

M2 M2

1303610 1329655 15886621

MR MR

Say. Rs…15887000 Only Rupees One Cores fifty eight lakhs eighty seven thousand.


109


Cost Estimate

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 1 part 2 T P No.4

No.

Qty

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1

51520 22080 15540 15540 9840 1180

2 3880

3

3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10

Item Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard murrum, boulders, & macadam roads. in hard rock & soft rock 1.50 to 3.00 mt. depth in soft soil & hard murrum in hard rock & soft rock 3.00 to 4.50 mt. depth in hard rock & soft rock 4.50 to 6.00 mt. depth in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials.

33650 for 150 mm dia SWG pipes 1870 for 200 mm dia SWG pipes 710 for 250 mm dia SWG pipes for 300 mm dia RCC & NP-3 class 760 pipes for 350 mm dia RCC & NP-3 class 1430 pipes for 400 mm dia RCC & NP-3 class 510 pipes for 450 mm dia RCC & NP-3 class 70 pipes for 600 mm dia RCC & NP-3 class 650 pipes for 800 mm dia RCC & NP-3 class 870 pipes for 1000 mm dia RCC & NP-3 class pipe 1330

Rate

Per

39.5 135

M3 M3

2035040 2980800

23+28/2 33+38/2

47.5 166.5

M3 M3

738150 2587410

24+29/2 34+39/2

199.5

M3

1963080

35+40/2

252.5

M3

297950

36+41/2

1170

M3

4539600

616/2

130 190 280

RMT RMT RMT

4374500 355300 198800

855/3 855/4 855/6

256

RMT

194560

906

602

RMT

860860

918

638

RMT

325380

919

707

RMT

49490

920

1133

RMT

736450

921-A

1654

RMT

1438980

923

2495

RMT

3318350

925


Amount

SOR

110


No. 3.8 3.8

Qty 1920 360

4

4.1

4.1.1

728

4.1.2 90

4.2

4.2.1

579

4.2.2 480 4.3

4.3.1

45

4.3.2 20 4.4

Item Rate for 1200 mm dia RCC & NP-3 class pipes 3082 for 1600 mm dia RCC & NP-3 class pipes 4740 providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. 2640 Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. 1632 manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. 4960 Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. 2604 manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia) Manhole type "C" as above but upto 4.0 mt. depth. 15456 Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. 4068 Scraper manhole pipe "SI" rectangular type for 600 mm dia to 1200 mm dia sewer pipes & for depth 2.5mt. To 9.0 mt.


Cost Estimate

Per

Amount

SOR

RMT

5917440

927

RMT

1706400

929

NOS.

1921920

608/1

RMT

146880

608/2

NOS.

2871840

608/3

RMT

1249920

608/4

NOS.

695520

608/5

RMT

81360

608/6

111


No. 4.4.1 4.4.2

5

6

7 9 9.1 9.2 10 10.1 10.2

Qty

Cost Estimate

Item

Scraper manhole pipe "SI" as above 22 but upto 2.5 mt. depth Extra depth beyond 2.5 mt. & upto 9.0 mt. depth for type "SI" scraper 30 manhole as above. Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation 19420 limits incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 946 10 T,MD Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 406 20 T,MD Breaking of pavement surface 17525 Conventional Asphalt surface 17525 Paver Asphalt surface Re- instating the road surface 53107 WBM 35050 Asphalt

Rate

Per

Amount

15240

NOS.

335280

610/1

4596

RMT

137880

610/2

33

M3

640860

712

690

1 PAIR

652740 659+660

900

1 PAIR

365400 666+668

18 26

M2 M2

55 85

M2 M2

315454 455656

SOR No.

43 44

2920871 MR 2979288 MR 50389408.63 Rs. 50400000 Only Rupees Five Crore four lakhs


112


No.

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1 1.5 1.5.1

2

3

3.1.1 3.1.2 3.1.4 3.1.5 3.1.6

3.1.8

Cost Estimate

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 6 Qty Item Rate Per Amount SOR No. Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard M3 1207910 23+28/2 39.5 30580 murrum, boulders, & macadam roads. 13110 in hard rock & soft rock 135 M3 1769850 33+38/2 1.50 to 3.00 mt. depth 8030 in soft soil & hard murrum 47.5 M3 381425 24+29/2 166.5 M3 1336995 34+39/2 8030 in hard rock & soft rock 3.00 to 4.50 mt. depth 199.5 M3 1206975 35+40/2 6050 in hard rock & soft rock 4.50 to 6.00 mt. depth 1730 in hard rock & soft rock 252.5 M3 436825 36+41/2 6.00 to 7.50 mt. depth 290 in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type 1170 M3 1790100 616/2 1530 design) lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. 26050 for 150 mm dia SWG pipes 130 RMT 3386500 855/3 840 for 200 mm dia SWG pipes 190 RMT 159600 855/4 280 RMT 11200 855/6 40 for 250 mm dia SWG pipes for 300 mm dia RCC & NP-3 class 190 pipes RMT 48640 906 256 for 350 mm dia RCC & NP-3 class RMT 222740 918 370 pipes 602 for 400 mm dia RCC & NP-3 class 40 pipes RMT 25520 919 638 for 500 mm dia RCC & NP-3 class RMT 725050 921 853 850 pipes for 600 mm dia RCC & NP-3 class pipes 240 1133 RMT 271920 921-A


113


No.

Qty

Item

4

4.1

4.1.1

492

4.1.2 70 4.2

4.2.1

299

4.2.2 250 4.3

4.3.1

Cost Estimate

56

4.3.2 40 6

10 7

providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design complete (excl. excavation) Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia sewer) Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. Manhole type "D1" as above but upto 6.0 mt. depth. Extra depth beyond 6.00 mt. but upto 10.00 mt. depth for "D1" type manhole above. Manhole type "S1" as above but upto 4.0 mt. depth.

Rate

Per

2640

NOS.

1298880

608/1

1632

RMT

114240

608/2

4960

NOS.

1483040

608/3

2604

RMT

651000

608/4

15456

NOS.

865536

608/5

4068

RMT

162720

608/6

22764

NOS.

136584

608/7

2592

RMT

25920

608/8

15240

NOS.

106680

610/1


Amount

SOR No.

114


No.

Qty

20 5 7550 6 645 7 215 9 9.1 9.2 10 10.1 10.2

10335 10335 31318 20670

Cost Estimate

Item Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "S1" type manhole above. Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 10 T,MD Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 20 T,MD Breaking of pavement surface Conventional Asphalt surface Paver Asphalt surface Re- instating the road surface WBM Asphalt

Rate

Per

Amount

SOR No.

4596

RMT

91920

610/2

33

M3

249150

712

690

1 PAIR

445050 659+660

900

1 PAIR

193500 666+668

18 26

M2 M2

186030 268710

55 85

M2 M2

1722505 1756955

43 44

MR MR 22739670 Rs. 22740000 Only Rupees Two Crore Twenty Seven Lakhs Forty Thousand.


115


No.

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 2 Qty Item Rate Per Amount SOR

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1

18630 7990 3930 3930 1140 10

2 900

3

3.1.1 3.1.2 3.1.3 3.1.4 3.1.6

4

Cost Estimate

16510 470 320 450 40

Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard murrum, boulders, & macadam roads. in hard rock & soft rock 1.50 to 3.00 mt. depth in soft soil & hard murrum in hard rock & soft rock 3.00 to 4.50 mt. depth in hard rock & soft rock 4.50 to 6.00 mt. depth in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) Lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. for 150 mm dia SWG pipes for 200 mm dia SWG pipes for 250 mm dia SWG pipes for 300 mm dia RCC & NP-3 class pipes for 400 mm dia RCC & NP-3 class pipes providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers

39.5 135

M3 M3

735885 1078650

23+28/2 33+38/2

47.5 166.5

M3 M3

186675 654345

24+29/2 34+39/2

199.5

M3

227430

35+40/2

252.5

M3

2525

36+41/2

1170

M3

1053000

616/2

130 190 280

RMT RMT RMT

2146300 89300 89600

855/3 855/4 855/6

256

RMT

115200

906

638

RMT

25520

919


116


No.

Qty

Item

4.1

4.1.1

345

4.1.2 50

4.2

4.2.1 4.2.2

231 91

4.3

4.3.1

6

4.3.2 1 4.4

5 3710 6 437 7 145 9 9.1 9.2 10 10.1 10.2

Cost Estimate

6382 6382 19340 12764

Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800) Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. Scraper manhole pipe "SI" rectangular type for 600 mm dia to 1200 mm dia sewer pipes & for depth 2.5mt. To 9.0 mt. Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 10 T,MD Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 20 T,MD Breaking of pavement surface Conventional Asphalt surface Paver Asphalt surface Re- instating the road surface WBM Asphalt

Rate

Per

Amount

SOR

2640

NOS.

910800

608/1

1632

RMT

81600

608/2

4960

NOS.

1145760

608/3

2604

RMT

236964

608/4

15456

NOS.

92736

608/5

4068

RMT

4068

608/6

122430

712

33

M3

690

1 PAIR

301530 659+660

900

1 PAIR

130500 666+668

18 26

M2 M2

114876 165932

55 85

M2 M2

1063700 1084940

43 44

MR MR 11860266 Say Rs..11861000 Only Rupees One Crore Eighteen Lakhs Sixty One Thousand.


117


Cost Estimate

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 3 T P No.3 No. Qty Item Rate Per Amount SOR

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1

21200 9080 6460 6460 6160 1540

2 1490

3

3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.9 3.1.10

16200 560 280 190 890

Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard murrum, boulders, & macadam roads. in hard rock & soft rock 1.50 to 3.00 mt. depth in soft soil & hard murrum in hard rock & soft rock 3.00 to 4.50 mt. depth in hard rock & soft rock 4.50 to 6.00 mt. depth in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. for 150 mm dia SWG pipes for 200 mm dia SWG pipes for 250 mm dia SWG pipes for 300 mm dia RCC & NP-3 class pipes for 350 mm dia RCC & NP-3 class pipes

for 800 mm dia RCC & NP-3 class 460 pipes for 900 mm dia RCC & NP-3 class 450 pipes

39.5 135

M3 M3

837400 1225800

23+28/2 33+38/2

47.5 166.5

M3 M3

306850 1075590

24+29/2 34+39/2

199.5

M3

1228920

35+40/2

252.5

M3

388850

36+41/2

1170

M3

1743300

616/2

130 190 280

RMT RMT RMT

2106000 106400 78400

855/3 855/4 855/6

256

RMT

48640

906

602

RMT

535780

918

1654

RMT

760840

923

1945

RMT

875250

923


118


No.

Qty

Item

4

4.1

4.1.1

326

4.1.2 50

4.2

4.2.1

213

4.2.2 190

4.3

4.3.1

65

4.3.2 50 4.4

Cost Estimate

providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design complete (excl. excavation) Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia sewer) Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. Scraper manhole pipe "SI" rectangular type for 600 mm dia to 1200 mm dia sewer pipes & for depth 2.5mt. To 9.0 mt.

Rate

Per

Amount

SOR

2640

NOS.

860640

608/1

1632

RMT

81600

608/2

4960

NOS.

1056480

608/3

2604

RMT

494760

608/4

15456

NOS.

1004640

608/5

4068

RMT

203400

608/6


119


No. 4.4.1 4.4.2

5

6

7 9 9.1 9.2 10 10.1 10.2

Qty

Cost Estimate

Item

Scraper manhole pipe "SI" as above 5 but upto 2.5 mt. depth Extra depth beyond 2.5 mt. & upto 9.0 mt. depth for type "SI" scraper 15 manhole as above. Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits 6750 incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 457 incl. finishing etc. complete. 10 T,MD Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 152 incl. finishing etc. complete. 20 T,MD Breaking of pavement surface 7175.48 Conventional Asphalt surface 7175.48 Paver Asphalt surface Re- instating the road surface 21744 WBM 14357 Asphalt

Rate

Per

Amount

SOR

15240

NOS.

76200

610/1

4596

RMT

68940

610/2

33

M3

222750

712

690

1 PAIR

315330 659+660

900

1 PAIR

136800 666+668

18 26

M2 M2

129159 186562

55 85

M2 M2

1195920 1220345

43 44

MR MR 18571546 Rs.. 18572000 Only Rupees One Crore Eighty Five Lakhs Seventy Two Thousand.


120


Cost Estimate

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 5

No.

Qty

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1

19220 8240 6670 6670 4300 140

2 1630

3

3.1.1 3.1.2 3.1.3 3.1.4 3.1.6 3.1.7

11920 420 450 1750 330 400

3.1.9 160 3.1.120 3.1.13

1160 40

Item Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard murrum, boulders, & macadam roads. in hard rock & soft rock 1.50 to 3.00 mt. depth in soft soil & hard murrum in hard rock & soft rock 3.00 to 4.50 mt. depth in hard rock & soft rock 4.50 to 6.00 mt. depth in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. for 150 mm dia SWG pipes for 200 mm dia SWG pipes for 250 mm dia SWG pipes for 300 mm dia RCC & NP-3 class pipes for 400 mm dia RCC & NP-3 class pipes for 450 mm dia RCC & NP-3 class pipes for 600 mm dia RCC & NP-3 class pipes for 1000 mm dia RCC & NP-3 class pipes for 1100 mm dia RCC & NP-3 class pipes

Rate

Per

Amount

SOR

39.5 135

M3 M3

759190 1112400

23+28/2 33+38/2

47.5 166.5

M3 M3

316825 1110555

24+29/2 34+39/2

199.5

M3

857850

35+40/2

252.5

M3

35350

36+41/2

1170

M3

1907100

616/2

130 190 280

RMT RMT RMT

1549600 79800 126000

855/3 855/4 855/6

256

RMT

448000

906

638

RMT

210540

919

707

RMT

282800

920

1133

RMT

181280

921-A

2495

RMT

2894200

925

2718

RMT

108720

927


121


No.

Qty

Item

4

4.1

4.1.1

240

4.1.2 30 4.2

4.2.1

220

4.2.2 220 4.3

4.3.1

22

4.3.2 10 4.4

4.4.1

Cost Estimate

10

4.4.2 2

providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design complete (excl. excavation) Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia sewer) Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. Scraper manhole pipe "SI" rectangular type for 600 mm dia to 1200 mm dia sewer pipes & for depth 2.5mt. To 9.0 mt. Scraper manhole pipe "SI" as above but upto 2.5 mt. depth Extra depth beyond 2.5 mt. & upto 9.0 mt. depth for type "SI" scraper manhole as above.

Rate

Per

Amount

SOR

2640

NOS.

633600

608/1

1632

RMT

48960

608/2

4960

NOS.

1091200

608/3

2604

RMT

572880

608/4

15456

NOS.

340032

608/5

4068

RMT

40680

608/6

15240

NOS.

152400

610/1

4596

RMT

9192

610/2


122


No.

Qty

Item

Rate

Per

Amount

SOR

6920

Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits incl. spreading etc. complete

33

M3

228360

712

369

Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 10 T,MD

690

1 PAIR

254610

659+66 0

900

1 PAIR

110700

666+66 8

18 26

M2 M2

115884 167388

43 44

55 85

M2 M2

1072940 1094375

5

6

7 123 9 9.1 9.2 10 10.1 10.2

Cost Estimate

6438 6438 19508 12875

Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 20 T,MD Breaking of pavement surface Conventional Asphalt surface Paver Asphalt surface Re- instating the road surface WBM Asphalt

MR MR 17913411 Rs..17914000 Rupees One Crore Seventy Nine Lakhs Fourteen Thousand Only.


123


No.

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1 1.5

2

3

3.1.1 3.1.2 3.1.4

3.1.8

Cost Estimate

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 7 Qty Item Rate Per Amount SOR Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard 10190 murrum, boulders, & macadam roads. M3 402505 23+28/2 39.5 4370 in hard rock & soft rock 135 M3 589950 33+38/2 1.50 to 3.00 mt. depth 47.5 M3 167200 24+29/2 3520 in soft soil & hard murrum 3520 in hard rock & soft rock 166.5 M3 586080 34+39/2 3.00 to 4.50 mt. depth 3590 in hard rock & soft rock 199.5 M3 716205 35+40/2 4.50 to 6.00 mt. depth 520 in hard rock & soft rock 252.5 M3 131300 36+41/2 6.00 to 7.50 mt. depth Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type 1170 M3 807300 616/2 690 design) lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. 6550 for 150 mm dia SWG pipes 130 RMT 851500 855/3 190 RMT 36100 855/4 190 for 200 mm dia SWG pipes 160 for 250 mm dia SWG pipes 280 RMT 44800 855/6 for 300 mm dia RCC & NP-3 class 40 pipes 10240 906 256 RMT for 500 mm dia RCC & NP-3 class 810350 921 853 RMT 950 pipes for 600 mm dia RCC & NP-3 class 1133 RMT 820 pipes 929060 921-A for 800 mm dia RCC & NP-3 class 66160 923 1654 RMT 40 pipes


124


No.

Qty

Item

4

4.1

4.1.1

131

4.1.2 21 4.2

4.2.1

99

4.2.2 100 4.3

4.3.1

Cost Estimate

40

4.3.2 20 6

10

providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design complete (excl. excavation) Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia sewer) Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. Manhole type "S1" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "S1" type manhole above.

Rate

Per

Amount

SOR

2640

NOS.

345840 608/1

1632

RMT

34272 608/2

4960 NOS.

491040 608/3

2604

RMT

260400 608/4

15456 NOS.

618240 608/5

4068

RMT

81360 608/6

15240

NOS.

91440 610/1

4596

RMT

45960 610/2


125


No.

Qty

Item

5 3550 6 206 7 70 9 9.1 9.2 10 10.1 10.2

Cost Estimate

3421 3421 10366 6841

Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 10 T,MD Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 20 T,MD Breaking of pavement surface Conventional Asphalt surface Paver Asphalt surface Re- instating the road surface WBM Asphalt

Rate

33

Per

Amount

SOR

M3

117150

712

142140

659+ 660

63000

666+ 668

61572 88938

43 44

1 690 PAIR 1 900 PAIR 18 26

M2 M2

55 85

M2 M2

570114 MR 581516 MR 9741731 Rs. … 9742000 Rupees Ninety Seven Lakhs Forty Two Thousand only/.


126


Cost Estimate

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 8 No. Qty Item Rate Per Amount SOR

1

1.1 1.1.1 1.1.2 1.2 1.2.1 1.2.2 1.3 1.3.1 1.4 1.4.1

33400 23170 7160 7160 4320 550

2 1820

3

3.1.1 3.1.2 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8

28690 1070 230 210 1030 260 690

Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. Up to 1.50 mt. depth In all sorts of soil & soft murrum, hard murrum, boulders, & macadam roads. in hard rock & soft rock 1.50 to 3.00 mt. depth in soft soil & hard murrum in hard rock & soft rock 3.00 to 4.50 mt. depth in hard rock & soft rock 4.50 to 6.00 mt. depth in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. for 150 mm dia SWG pipes for 200 mm dia SWG pipes for 300 mm dia RCC & NP-3 class pipes for 350 mm dia RCC & NP-3 class pipes for 400 mm dia RCC & NP-3 class pipes for 450 mm dia RCC & NP-3 class pipes for 600 mm dia RCC & NP-3 class pipes

39.5 135

M3 M3

1319300 3127950

23+28/2 33+38/2

47.5 166.5

M3 M3

340100 1192140

24+29/2 34+39/2

199.5

M3

861840

35+40/2

252.5

M3

138875

36+41/2

1170

M3

2129400

616/2

130 190

RMT RMT

3729700 203300

855/3 855/4

256

RMT

58880

906

602

RMT

126420

918

638

RMT

657140

919

707

RMT

183820

920

1133

RMT

781770

921-A


127


No.

Qty

Item

4

4.1

4.1.1

632

4.1.2 70 4.2

4.2.1

361

4.2.2 260 4.3

4.3.1

Cost Estimate

46

4.3.2 30 5 19420 6 759

providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design complete (excl. excavation) Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia ) Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole above. Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 10 TMD

Rate

Per

Amount

SOR

2640

NOS.

1668480 608/1

1632

RMT

114240 608/2

4960 NOS.

1790560 608/3

2604

RMT

677040 608/4

15456 NOS.

710976 608/5

4068

33

RMT

M3

1 690 PAIR


122040 608/6

640860

712

523710

659+ 660

128


No.

Qty

7 260 9 9.1 9.2 10 10.1 10.2

11731 11731 35550 23463

Cost Estimate

Item Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 20 T,MD Breaking of pavement surface Conventional Asphalt surface Paver Asphalt surface Re- instating the road surface WBM Asphalt

Rate

Per

1 900 PAIR 18 26

M2 M2

55 85

M2 M2

Amount

SOR

234000

666+ 668

211158 305006

43 44

1955250 MR 1994355 MR 25798310 Say..Rs..25800000 Rupees Two Crore Fifty Eight Lakhs.


129


Cost Estimate

BILL OF QUANTITIES FOR COLLECTIVE SYSTEM OF T.P. SCHEME NO. 8 slum Qty Item Rate Per Amount SOR Excavation for sewer line trenches, manholes including all safety provisions using side rails etc. 1 including refilling the trenches & stacking the excavated stuff up to a lead of 90 mt. as directed. 1.1 Up to 1.50 mt. depth In all sorts of soil & soft murrum, 1.1.1 hard murrum, boulders, & macadam 14980 roads. 39.5 M3 591710 23+28/2 1.1.2 6420 in hard rock & soft rock 135 M3 866700 33+38/2 1.2 1.50 to 3.00 mt. depth 1.2.1 4350 in soft soil & hard murrum 47.5 M3 206625 24+29/2 1.2.2 166.5 M3 724275 34+39/2 4350 in hard rock & soft rock 1.3 3.00 to 4.50 mt. depth 1.3.1 3950 in hard rock & soft rock 199.5 M3 788025 35+40/2 1.4 4.50 to 6.00 mt. depth 1.4.1 252.5 M3 361075 36+41/2 1430 in hard rock & soft rock 1.5 6.00 to 7.50 mt. depth 1.5.1 280 in hard rock & soft rock Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine 2 crushed metal incl. consolidation, curing, etc complete. ( c type bedding M3 1041300 616/2 890 as per type design) 1170 lowering, laying and jointing stone ware pipes & RCC pipes in CM 1:1 of following dia. In proper position grade & alignment as directed by engineer in charge incl. conveyance 3 from stores to site of work, labour, giving hydraulic testing as per IS code, etc. complete incl. cost of jointing materials. 3.1.1 10780 for 150 mm dia SWG pipes 130 RMT 1401400 855/3 3.1.2 1110 for 200 mm dia SWG pipes 190 RMT 210900 855/4 210 for 250 mm dia SWG pipes 280 RMT 58800 855/6 for 300 mm dia RCC & NP-3 class 3.1.4 RMT 25600 906 100 pipes 256 for 350 mm dia RCC & NP-3 class 3.1.5 602 270 pipes RMT 162540 918 for 400 mm dia RCC & NP-3 class 3.1.6 RMT 102080 919 160 pipes 638 for 450 mm dia RCC & NP-3 class 3.1.7 RMT 127260 920 707 180 pipes for 500 mm dia RCC & NP-3 class pipes RMT 853000 921 1000 853 No.


130


No. 3.1.8

Qty 260

4

4.1

4.1.1

262

4.1.2 30

4.2

4.2.1

138

4.2.2 130 4.3

4.3.1 4.3.2

32 30 9

10

Item for 600 mm dia RCC & NP-3 class pipes providing & constructing sewer manholes, scraper manholes & unit house connection chamber, as per the type design in brick masonry in CM 1:3 & out side plastering CM 1:3 necessary coping in RCC M200, fixing CI steps & fixing manhole frame & covers. (but excluding supply of manhole frame & covers)over manholes & house connections, chambers & fixing manhole covers (but excluding supply of manhole covers) over scraper manholes etc. complete, providing & fixing safety chain wherever necessary as per the stipulation in the type design complete (excl. excavation) Manhole type "A" circular type having inside dia. of 1200 mm for depth upto 1.50 mt. for 150 mm to 500 mm dia sewer. Manhole type "A" as above but upto 1.00 mt. depth. Extra depth beyond 1.00 mt. but upto 1.50 mt. depth for "A" type manhole above. manhole type "B" circular type having inside dia of minimum 1500 mm & for depth from 1.5 mt to 4.00 mt. (for 150 mm to 600 mm dia sewer) Manhole type "B" as above but upto 1.50 mt. depth. Extra depth beyond 1.50 mt. but upto 4.00 mt. depth for "B" type manhole above. manhole type "C" circular type having inside dia of minimum 1500 mm & for depth from 4.0 mt to 6.00 mt. (for 150 mm to 1800 mm dia Manhole type "C" as above but upto 4.0 mt. depth. Extra depth beyond 4.00 mt. but upto 6.00 mt. depth for "C" type manhole Manhole type "D1" as above but upto 6.0 mt. depth. Extra depth beyond 6.00 mt. but upto 10.00 mt. depth for "D1" type manhole above.

Cost Estimate

Rate

Per

Amount

SOR

1133

RMT

294580

921-A

2640

NOS.

691680

608/1

1632

RMT

48960

608/2

4960

NOS.

684480

608/3

2604

RMT

338520

608/4

15456

NOS.

494592

608/5

4068

RMT

122040

608/6

22764

NOS.

204876

608/7

2592

RMT

25920

608/8


131


No.

Qty

5 12460 6 331 7 110 9 9.1 9.2 10 10.1 10.2

5239 5239 15874 10477

Cost Estimate

Item Removing the surplus earth after refilling the trenches as directed with in the Municipal Corporation limits incl. spreading etc. complete Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 10 TMD Providing, supplying & fixing the manhole frames & covers in CC 1:2:4 incl. finishing etc. complete. 20 TMD Breaking of pavement surface Conventional Asphalt surface Paver Asphalt surface Re- instating the road surface WBM Asphalt

Rate

Per

Amount

SOR

33

M3

411180

712

690

1 PAIR

228390

659+66 0

900

1 PAIR

99000

666+66 8

18 26

M2 M2

94293 136201

43 44

55 85

M2 M2

873082 890543

MR MR 13159627 Say..Rs…13160000 Rupees One Crore Thirty One Lakhs Sixty Thousand Only. ___________ City Engineer Rajkot Municipal Corporation


132


Cost Estimate

9.4.2 Estimates of House Connections of Phase-III (Part-1) BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 1 No. Qty Item Rate Per Amount SOR No.

1

22030

2

36150

3

1930

4 4.1

3254

4.2

5 6 7 8 9 10 11

Excavation in all soils, soft & hard murrum etc. complete with refilling the trenches. Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" incl. jointing material. Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) House connection chamber as per type design Up to 0.60 mt. depth

1085 Above 0.60 mt. depth Providing, supplying & fixing precast RCC frame & cover 5 MT 4338 capacity. 27530 Breaking of pavement surface 2892 Making holes in manholes Removing surplus earth from the 13660 site etc. complete as directed Re-instating the road surface 27530 WBM 16518 Asphalt

39.5

M3

870185

23+28/2

RMT

3072750

855/2

1170

M3

2258100

616/2

770

NOS.

2505195

614

1000

NOS.

1084500

612

600 18 20

1 PAIR M2 NOS.

2602800 495540 57840

657+659 43 592

33

M3

450780

712

55 85

M2 M2

1514150 1404030

85

MR MR 16315870 Say Rs. 16316000 Only Rupees One Crore Sixty Three lakhs Sixteen thousand.


133


Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 1 Part 2 & T.P. 4

No.

Qty

1

41190

2

3600

3

67600

4 4.1

6084

4.2

2028

5 6 7

8112 51480 5408

8 9 10 11

20850 51480 30888

Item Excavation in all soils, soft & hard murrum etc. complete with refilling the trenches. Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" incl. jointing material. House connection chamber as per type design Up to 0.60 mt. depth Above 0.60 mt. depth Providing, supplying & fixing precast RCC frame & cover 5 MT capacity. Breaking of pavement surface Making holes in manholes Removing surplus earth from the site etc. complete as directed Re-instating the road surface WBM Asphalt

Rate

Per

Amount

SOR No.

39.5

M3

1627005

23+28/2

1170

M3

4212000

616/2

85

RMT

5746000

855/2

770

NOS.

4684680

614

1000

NOS.

2028000

612

600 18 20

1 PAIR M2 NOS.

4867200 926640 108160

657+659 43 592

33

M3

688050

712

55 85

M2 M2

2831400 2625480

MR MR 30344615 Rs. 30345000 Only Rupees Three Crore Three Lakhs Forty five thousand.


134


Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 6 No. Qty Item Rate Per Amount SOR No. Excavation in all soils, soft & hard murrum etc. complete with refilling 39.5 1 26200 the trenches. M3 1034900 23+28/2 Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" 2 43000 incl. jointing material. RMT 3655000 855/2 85 Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type 3 2290 bedding as per type design) M3 2679300 616/2 1170 House connection chamber as per 4 type design 4.1 3870 Up to 0.60 mt. depth 770 NOS. 2979900 614 4.2

5 6 7 8 9 10 11

1290 Above 0.60 mt. depth Providing, supplying & fixing precast RCC frame & cover 5 MT 5160 capacity. 32750 Breaking of pavement surface 3440 Making holes in manholes Removing surplus earth from the 12120 site etc. complete as directed Re-instating the road surface 32750 WBM 19650 Asphalt

1000

NOS.

1290000

600 18 20

1 PAIR M2 NOS.

33

M3

399960

55 85

M2 M2

1801250 1670250

612

3096000 657+659 589500 43 68800 592 712

MR MR 19264860 Rs…19265000 Only Rupees One crore ninty two lakhs Sixty five thousand.


135


Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 2 Qty Item Rate Per Amount SOR No. Excavation in all soils, soft & hard murrum etc. complete with refilling the 39.5 M3 1 17730 trenches. 700335 23+28/2 Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" incl. jointing 2 29100 material. 855/2 85 RMT 2473500 Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type 3 1550 design) 1813500 616/2 1170 M3 House connection chamber as per type 4 design 4.1 2619 Up to 0.60 mt. depth 770 NOS. 2016630 614

No.

4.2 5 6 7 8 9 10 11

873 Above 0.60 mt. depth Providing, supplying & fixing pre-cast 3492 RCC frame & cover 5 MT capacity. 22160 Breaking of pavement surface 2328 Making holes in manholes Removing surplus earth from the site 12050 etc. complete as directed Re-instating the road surface 22160 WBM 13296 Asphalt

1000 NOS. 1 600 PAIR 18 M2 20 NOS.

873000

612

2095200 657+659 398880 43 46560 592

33

M3

397650

55 85

M2 M2

1218800 1130160

712

MR MR 13164215 Say Rs….13165000 Only Rupees One crore Thirty One lakhs Sixty Five thousand.


136


No.

1

2

3 4 4.1 4.2 5 6 7 8 9 10 11

Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 3 Qty Item Rate Per Amount SOR No. Excavation in all soils, soft & hard murrum etc. complete with refilling the 18550 trenches. M3 732725 23+28/2 39.5 Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" incl. jointing 30450 material. 2588250 855/2 85 RMT Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type 1630 design) M3 1907100 616/2 1170 House connection chamber as per type design 2741 Up to 0.60 mt. depth 770 NOS. 2110185 614 914 Above 0.60 mt. depth Providing, supplying & fixing pre-cast 3654 RCC frame & cover 5 MT capacity. 23190 Breaking of pavement surface 2436 Making holes in manholes Removing surplus earth from the site 12350 etc. complete as directed Re-instating the road surface 23190 WBM 13914 Asphalt

1000 600 18 20

NOS. 1 PAIR M2 NOS.

913500

33

M3

407550

55 85

M2 M2

1275450 1182690

612

2192400 657+659 417420 43 48720 592 712

MR MR 13775990 Rs…13776000 Rupees One Crore Thirty Seven Lakhs Seventy Six Thousand Only/.


137


Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 5 No. Qty Item Rate Per Amount SOR No. Excavation in all soils, soft & hard murrum etc. complete with refilling 39.5 1 14990 the trenches. M3 592105 23+28/2 Providing, supplying, lowering & jointing of 100 mm dia. Salt glazed stone ware pipe class "A" incl. jointing 2 24600 material. 2091000 855/2 85 RMT Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding 3 1310 as per type design) M3 1532700 616/2 1170 House connection chamber as per type 4 design 4.1 2214 Up to 0.60 mt. depth 770 NOS. 1704780 614 4.2 5 6 7 8 9 10 11

738 Above 0.60 mt. depth Providing, supplying & fixing pre-cast 2952 RCC frame & cover 5 MT capacity. 18740 Breaking of pavement surface 1968 Making holes in manholes Removing surplus earth from the site 11020 etc. complete as directed Re-instating the road surface 18740 WBM 11244 Asphalt

1000 600 18 20

NOS. 1 PAIR M2 NOS.

738000

33

M3

363660

55 85

M2 M2

1030700 955740

612

1771200 657+659 337320 43 39360 592 712

MR MR 11156565 Say Rs….11157000 Rupees One Crore Eleven Lakhs Fifty Seven Thousand Only/-


138


Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 7 No. Qty Item Rate Per Amount SOR No. Excavation in all soils, soft & hard murrum etc. complete with refilling 39.5 1 8410 the trenches. M3 332195 23+28/2 Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" incl. 2 13800 jointing material. RMT 1173000 855/2 85 Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type 3 740 bedding as per type design) M3 865800 616/2 1170 House connection chamber as per 4 type design 4.1 1242 Up to 0.60 mt. depth 770 NOS. 956340 614 4.2

5 6 7 8 9 10 11

414 Above 0.60 mt. depth Providing, supplying & fixing precast RCC frame & cover 5 MT 1656 capacity. 10510 Breaking of pavement surface 1104 Making holes in manholes Removing surplus earth from the site 3900 etc. complete as directed Re-instating the road surface 10510 WBM 6306 Asphalt

1000

NOS.

414000

600 18 20

1 PAIR M2 NOS.

33

M3

128700

55 85

M2 M2

578050 536010

612

993600 657+659 189180 43 22080 592 712

MR MR 6188955 Say Rs. 6189000 Only Rupees Sixty one lakhs eighty nine thousand.


139


Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 8 No. Qty Item Rate Per Amount SOR No. Excavation in all soils, soft & hard murrum etc. complete with refilling 39.5 1 31650 the trenches. M3 1250175 23+28/2 Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" incl. 2 51950 jointing material. RMT 4415750 855/2 85 Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding 3 2770 as per type design) M3 3240900 616/2 1170 House connection chamber as per 4 type design 4.1 4676 Up to 0.60 mt. depth 770 NOS. 3600135 614 4.2

5 6 7 8 9 10 11


1000

NOS.

1558500

600 18 20

1 PAIR M2 NOS.

33

M3

569910

55 85

M2 M2

2175800 2017560

612

3740400 657+659 712080 43 83120 592 712

MR MR 23364330 Say…Rs…23365000 Only Rupees Two crore thirty six lakhs five thousand.


140


No.

Qty

1

13440

2

22050

3

1175

4 4.1

1985

4.2

5 6 7 8 9 10 11

Cost Estimate

BILL OF QUANTITIES OF HOUSE CONNECTION WORK FOR T.P. SCHEME NO. 8 slum Item Rate Per Amount Excavation in all soils, soft & hard murrum etc. complete with refilling the trenches. Providing, supplying, lowering & jointing of 100 mm dia. Salt glazzed stone ware pipe class "A" incl. jointing material. Providing c.c. bedding in 1:3:6 (M100) using 12 to 25 mm machine crushed metal incl. consolidation, curing, etc complete. ( c type bedding as per type design) House connection chamber as per type design Up to 0.60 mt. depth


39.5

SOR No.

M3

530880

23+28/2

RMT

1874250

855/2

1170

M3

1374750

616/2

770

NOS.

1528065

614

1000

NOS.

661500

612

600 18 20

1 PAIR M2 NOS.

33

M3

205260

55 85

M2 M2

924000 856800

85

1587600 657+659 302400 43 35280 592 712

MR MR 9880785 Say Rs….9881000 Rupees Ninety Eight Lakhs Eighty One thousand Only/___________ City Engineer Rajkot Municipal Corporation


141


Cost Estimate

9.4.3 Estimates of Pumping Stations Civil work of Phase-III (Part-1) Sub Estimate Name of Work : Design, Construction, testing and commissioning of civil component of sewage pumping station under sewage project phase-III ( Part-1) for Mavdi pumping station APS-01 Abstract-A Sr. No. 1 1.1 1.1 .1 1.1 .2 1.2 1.3 1.4 1.5 1.6 1.7 2

Quantity

Rate

Per

Amount

SOR No.

EXCAVATION 0.00 to 1.5 mt depth 39.50

cum

3160.00

135.00 210.00 240.00 295.00 337.00 421.25 526.56 1230.00

cum cum cum cum cum cum cum cum

4050.00 15750.00 18000.00 22125.00 25275.00 31593.75 10531.20 13530.00

23+28/ 2 33+38/ 2 39 40 11 42 42+55 12+55 278

Brick masonry in CM 1:6 in foundation and plinth

1059.00

cum

10590.00

114

1:2:4 CC for plinth beam with foam work including finishing etc.

2358.00

cum

4716.00

294

60.00 1059.00

cum cum

7800.00 26475.00

103 114

1890.00

cum

4725.00

300

2222.00 2358.00 2660.00 2422.00 2440.00 59.00

cum cum cum cum cum Sq. Mt

17220.50 3772.80 3857.00 14410.90 3416.00 11800.00

291 294 295 292 293 157

42.00

Sq. Mt

6762.00

146

12.25

Sq. Mt

1972.25

168

17.00

Sq. Mt

3400.00

170

810.00

Sq. Mt

12150.00

327

80.00

in all soil soft/hard murrum

30.00 75.00 75.00 75.00 75.00 75.00 20.00 11.00

do soft / hard rock 1.51 to 3 mt depth in hard rock 3.00 to 4.50 mt in hard rock 4.50 to 6.00 mt hard rock 6.00 to 7.50 mt hard rock 7.50 to 9.00 mt hard rock 9.00 to 10.50 mt hard rock 1:3:6 CC in foundation with 15 mm to 20 mm size kapchi etc complete

3 10.00 4 2.00 5 6

Description

130.00 25.00

7 2.50 8

Refilling the trench in plinth materials brought from outside Brick masonry in super structure in CM 1:6 etc complete RCC 1:2:4 for footing of columns with centering shuttering

9 10 11 12 13

7.75 1.60 1.45 5.95 1.40 200.00

14

161.00

15 16

161.00

RCC 1:2:4 for slab with 12 mm to 20 mm size machine crushed kapchi and necessary centering and shuttering etc complete do for beams do for chhajas do for columns do for lintels 20 mm thick sand face cement plaster in CM 1:3 with sponging etc. Complete in two coats 12 mm thick cement plaster incl. finishing in CM 1:3 Water bound distemper in 2 coats

200.00

Snowcem color of approved quality in two coats over a base coat

17 15.00

steel work for window and ventilation


142


Sr. No.

Cost Estimate

Description

Rate

Per

Amount

Quantity

18

SOR No.

20.00

Rolling shutter of approved design and quality with two coat of oil paint etc., complete

770.00

Sq. Mt

15400.00

353

30.00 40.00

Kota stone polished tiles of average 18 to 25 mm thick etc complete Mosaic tiles

240.00 159.00

Sq. Mt Sq. mt

7200.00 6360.00

178.00

rmt

4450.00

191 202 gwssb 17/160

22.00 138.00

No No

176.00 4140.00

1091

39.80

Kg

7960.00

2319.00

cum

46380.00

CC in M25 for vertical walls CC in M25 for top slab CC in M-25 for beams Bottom IPS 50 mm thick

4000.00 2868.00 3003.00 77.00

cum cum Sq. mt Sq. mt

284000.00 11902.20 8258.25 2564.10

823 gwssb d411+5 do 1v1 291 294 208

Cement plaster 20 mm thick in CM 1:3 with water proofing to RCC wall inside Providing CI MH cover & frames fixing of MH frame and cover providing and fixing water level indicator

59.00 21.00 2000.00

rmt No No

18585.00 2436.00 2000.00

157 gwssb MR

2450.00

No

2450.00

50.00 3600.00

Kg Qtl

75000.00 540000.00

gwssb WWB 302 gwssb

--

100000.00 1416343.95

19

20 21

25.00 22 23 24

8.00 30.00 200.00

25

Rain water pipe CI 100 mm dia comp Fan hooks from MS bar of 12 mm dia Fixing CI steps etc complete MS section of various size channel, angle girder etc, CC in M25 for bottom slab without centering

20.00 26 27 28 29 30

31 32 33

71.00 4.15 2.75 33.30

315.00 116.00 1.00 1.00

34 35

1500.00 150.00

36

--

Supplying MS special flange Providing, cutting, placing, TOR steel including binder wires etc comp with anticorrosive treatment. Gates misc. and job work

LS

Say Rs.

MR

1416400.00 415400.00

Plus Compound wall as per Abstract-B Total Amount Rs.


1831800.00

143


Cost Estimate

NAME OF WORK : CONSTRUCTION OF COMPOUND WALL AT MAVDI DRAINAGE PUMPING STATION ( DRAINAGE PHASE-III ) PART-1 Abstract-B Sr. No. 1

Quantity 205.00

2

11.50

3

61.50

4

34.00

5

2.00

6

15.00 22.50

7 8 9 10 11 12

7.50 2.00 1.10 9.00 84.00

13

75.00

14 15

11.00 51.00 455.00

16 17

462.00

18 19

390.00 825.00

20 21 22 23 24

142 1.40 1.00 1.00 34.00

25

300.00

26

19.00

27

33.00

Description Excavation for foundation in soft and hard murrum with average rate and depth up to 1.50 mt. with clearing the site by shifting & spreading excavated stuff up to 90 mt. lead, as per instruction. ~~Do~~ In soft & hard rock (Ave.) ~~Do~~ 1.51 to 3.0mt. In soft & hard rock (Ave.) ~~Do~~ 3.01 to 4.50mt. In soft & hard rock (Ave.) Supplying & Fixing R.C.C. pre-cast Frame & cover (Pair) 20 ton cap. Supplying, lowering laying & jointing RCC pipe 600mm Dia NP_3 Class Supplying, lowering laying & jointing RCC pipe 600mm Dia NP_2 Class C.C. Bedding Type C in 1:3:6 Constructing Manhole Type "C" ~~Do~~ Extra depth in Type "C" P.C.C. 1:4:8 in foundation Foundation masonry with rubble cement mortal in 1:6 cement :sand proportion Rubble plinth masonry work in C.M. 1:6 & with cement pointing 1:3 C.C. Coping work 1:2:4 Brick masonry with C.M. 1:6 Sand face cement plaster 20mm thick In C.M. 1:3 ( Double Coat) Water Proof cement paint two coat or base coat Steel work as per instruction TOR steel work comp. for R.C.C. work Patta work on plaster 10cm wide C.C. in 1:2:4 C.C. in 1:2:4 for beam C.C. in 1:2:4 for chajja Fixing steel angle on proper alignment Supplying & Fixing Barbed wire in Fencing Oil paint work for Door, Windows, Grills etc. with two coats Cement plaster Rough cast in C.m. 1:3

Rate

Per

Amount

SOR No.

39.50

Cu. Mt.

8097.50

135.00

Cu. Mt.

1552.50

166.50

Cu. Mt.

10239.75

199.50

Cu. Mt.

6783.00

900.00

Pair

1800.00

23+28/ 2 33+38/ 2 34+39/ 2 35+40/ 2 666+6 68

1133.00 532.00

Rmt. Rmt.

16995.00 11970.00

921 913

1170.00 15456.00 4068.00 922.00 494.00

Cu. Mt. Nos. Rmt. Cu. Mt. Cu. Mt.

8775.00 30912.00 4474.80 8298.00 41496.00

616/2 608/5 608/6 58 64

536.00

Cu. Mt.

40200.00

70

1459.00 1059.00

Cu. Mt. Cu. Mt.

16049.00 54009.00

136 114

57.00

Sq. Mt.

25935.00

150

17.00 39.80

Sq. Mt. Kg.

7854.00 15522.00

170 823

33.00 19 1500.00 2358.00 2660.00

Kg. Rmt. Cu. Mt. Cu. Mt. Cu. Mt.

27225.00 2698.00 2100.00 2358.00 2660.00

302 162 281 294 295

8.00

Nos.

272.00

540

7.00

Rmt.

2100.00

538

23.00

Sq. Mt.

437.00

473

37.00

Sq. Mt.

1221.00 352033.50

147


144


Cost Estimate

Name of Work : Design, Construction, testing and commissioning of civil component of sewage pumping station under sewage project phase-III ( Part-1) for Kalawad Road pumping station APS-02 Abstract-A Sr. No. Quantity Description Rate Per Amount SOR No. 1 1.1 1.1.1 1.1.2 1.2

293 572 835.00

1.3 1.4 1.5 1.6 1.7 2

830.00 825.0 825.00 800.00 76.00 260.00

3 4

76.00 590.00

5 6 7 8 9 10 11 12 13

657.00 16.00 18.00 57.00 19.00 44.00 13.00 3.00 9.00

14 15 16

2.00 95.00 2510.00

17

435.00

18

780.00

19

295.00

20 21

460.00 18.00

EXCAVATION 0.00 to 1.5 mt depth in all soil soft/hard murrum -do- in soft/hard rock 1.51 to 3.0 mt depth in hard rock 3.01 to 4.5 mt -do4.51 to 6.0 mt -do6.01 to 7.5 m -do7.51 to 9.0 m -do9.01 to 10.5 m -doAnchor fastener 32 mm dia CRS Fe 500 with drill hole and supply fixing with pull out test complete item PCC in M 100 CC M250 for base slab without centering CC M250 for wall CC M250 for column CC M200 for column CC M250 for beams CC M200 for beams CC M200 for top slab CC M250 for top slab CC M200 for chajja CC M200 for motor foundation CC M200 for lintel 2110+110 Brick masonry in CM 1:4 Cement plaster 20 mm thick with niru finishing (water proof) Cement plaster 20 mm thick with sand fase finishing (water proof) Cement plaster 13 mm thick with niru finish Kota stone flooring 15 to 25 mm thick with 50 mm c.m. bedding in 1:3 IPS flooring 50 mm thick Rolling shutter supplying and fixing with bearing and top cover complete

39.5 Cum 135.00 Cum 210.00 Cum 240.00 295.00 337.00 421.25 526.56 850.00

Cum Cum Cum Cum Cum No.s

123.00 Cum 2319.00 Cum 1000.00 3067.00 2655.00 3003.00 2590.00 2868.00 2156.00 2800.00 1920.00

Cum Cum Cum Cum Cum Cum Cum Cum Cum

11573.5 (23+28)/2 77220.00 (33+38)/2 175350 39 204100.00 213375.00 278025.00 337000.00 10018.56 221000.00

40 11 42 42+55 12+55 MR

93480.00 278 1386762.00 GWSSB d4-11+5 2628000.00 do 1-VI 49072.00 292-B 47790.00 292-A 171171.00 291 49210.00 294 126192.00 291 105608.00 291 8400.00 295 17200.00 202

2580.00 Cum 1059.00 Cum 59.00 sq mt

5160.00 293 100605.00 114 140090.00 157

59.00 sq mt

25665.00 157

42.00 sq mt

32760.00 116

240.00 sq mt

70800.00 191

77.00 sq mt 770.00 sq mt

35120.00 208 13860.00 353


145


Sr. No. 22 23 24 25

26 27 28 28.1 28.2 29 30 31

31.1 31.2 32 33

34 35 36 37 38 39

40 41 42.1 42.2 43

Quantity

Cost Estimate

Description

Rate

Per

8.00 steel door supplying fixing as 810.00 sq mt per instruction 17.00 steel window supplying fixing 810.00 sq mt as per instruction 8.00 steel ventilation -do810.00 sq mt 3000.00 iron work as per instruction 39.80 kg grill of channel bolt plates service min. screen etc. 80.00 CI step supply and fixing 138.00 No.s 6.00 bolt for motor foundation 2500.00 slice gate providing supplying fixing comp as IS 1.00 -do- for 600 dia pipe 75000.00 Nos. 2.00 -do- for 1200 dia pipe 200000.00 No.s 780.00 plastic paint with two coat and 28.00 sq mt one coat of primer 435.00 cement paint with two coat and 17.00 sq mt one coat of primer supplying providing fixing in line level and position of RCC NP3 class pipe with vata comp. 10.00 -do- 600 mm dia pipe 1133.00 Rmt 20.00 -do- 1200 mm dia pipe 3082.00 Rmt 34.00 Rain water pipe CI 100 mm 178.00 Rmt dia comp. 1.00 Gauntry with monorail about 3 450000.00 Unit tons capacity with girder and hoist complete fittings 1.00 C I Cowl providing and fixing 88.00 Nos. 100 mm dia 35.00 stair case railing as per 410.00 Rmt specification 1.00 water level indicator 2450.00 Nos. 150.00 M S flange ended specials 25.0 fan hook 12 mm dia 103500 supply providing fixing with bending binding and hooking bind with 18 gauge wire complete item TMT bar 10.00 Glaze tiles (color) supply and fixing comp 1.00 Indian type w.c. supplying fixing complete 20.00 G I pipe supply and fixing complete 15 mm dia 10.00 -do 25 mm dia 1.00 brass wheel valve supply and fixing 110 mm dia

50.00 Kg 22.00 No.s 36.00 Kg

332.00 sq mt

Amount

SOR No.

6180.00 327 13770.00 327 8400.00 327 119100.00 823

1140.00 15000.00 MR

11330.00 MR 61840.00 MR 11330.00 177 61840.00 170

11330.00 921-1 61840.00 927 6052.00 17/160 450000.00 MR

1056.00 15/160 GWSSB 14350.00 543 2460.00 D16/66 GWSSB 75000.00 ww b 302 550.00 1091 3726000.00 32-b

3320.00 201

270.00 Nos.

27.00 834

49.00 Rmt

980.0 931

101.00 Rmt 133.00 Nos.

1010.00 933 133.00 951


146


Sr. No. 44 45 46 47.1

48

Quantity

Cost Estimate

Description

Rate

3.00 water tap supply and fixing 15 mm dia 10.00 PVC pipe supply and fixing 110 mm dia 1.00 Flush valve supply and fixing 1.00 wash basin supply and fixing 660 x 410 mm with CI bracket and west pipe fixing 15.00 UCR masonry in c.m. 1:6

Per

Amount

SOR No.

49.00 No.s

147 939

141.00 Rmt

1410.00 885

264.00 No.s

264.00 835

493.00 No.s

493.00 825

536.00 Cum Total

8040.00 70 11743967.06 11745000.00

Part-A for wet well office panel room etc. Part-B for generator room Total estimate cost PART-A + B Tender premium 10.71% Total Rs.

Rs.1,17,45,000-00 Rs. 5,40,000-00 Rs.1,22,85,000-00 Rs. 13,15,000-00 Rs.1,36,00,000-00

Plus compound wall as per abstract-B Rs. 651000-00 Total amount ………..Rs.1,42,51,000-00


147


Cost Estimate

RAJKOT MUNICIPAL CORPORATION Name of Work : Design, Construction, testing and commissioning of civil component of sewage pumping station under sewage project phase-III ( Part-1) for Gandhigram pumping station APS-03 Abstract-A Sr. No. Quantity Description Rate Per Amount SOR No. 1 EXCAVATION 1.1 0.00 to 1.5 mt depth 1.1.1 108.00 in all soil soft/hard murrum 39.50 cum 4266.00 23+28/2 1.1.2 0.00 do soft / hard rock 135.00 cum 0.00 33+38/2 1.2 89.60 1.51 to 3 mt depth in hard rock 210.00 cum 18816.00 39 1.3 89.60 3.00 to 4.50 mt in hard rock 240.00 cum 21504.00 40 1.4 89.60 4.50 to 6.00 mt hard rock 295.00 cum 26432.00 11 1.5 89.60 6.00 to 7.50 mt hard rock 337.00 cum 30195.20 42 421.25 1.6 89.60 7.50 to 9.00 mt hard rock cum 37744.00 42+55 526.56 1.7 76.60 9.00 to 10.50 mt hard rock cum 40334.50 42+55 658.20 1.8 65.50 10.51 to 11.87 mt hard rock cum 43112.30 42+55 1:3:6 CC in foundation with 15 mm to 20 mm size kapchi etc 2 11.50 complete cum 14145.00 278 1230.00 3 9.50 Brick masonry in CM 1:6 in cum 10060.50 114 foundation and plinth 1059.00 4 1.30 1:2:4 CC for plinth beam with foam work including finishing etc. 2358.00 cum 3065.40 294 5 146.50 Refilling the trench in plinth cum 8790.00 103 materials brought from outside 60.00 6 34.70 Brick masonry in super structure 1059.00 cum 36747.30 114 in CM 1:6 etc complete 7 2.45 RCC 1:2:4 for footing of columns cum 4630.50 300 1890.00 with centering shuttering 8 7.75 RCC 1:2:4 for slab with 12 mm to 20 mm size machine crushed kapchi and necessary centering and shuttering etc complete 2222.00 cum 17220.50 291 9 1.60 do for beams 2358.00 cum 3772.80 294 10 1.45 do for chhajas 2660.00 cum 3857.00 295 11 5.95 do for columns 2422.00 cum 14410.90 292 12 1.40 do for lintel 2440.00 cum 3416.00 293 13 257.00 20 mm thick sand face cement 59.00 Sq. M 15163.00 157 plaster in CM 1:3 with spunging etc. Complete in two coats 14 161.00 12 mm thick cement plaster incl. 42.00 Sq. M 6762.00 146 finishing in CM 1:3 15 161.00 Water bound distemper in 2 coats 12.25 Sq. M 1972.25 168 16 257.00 Snowcem color of approved quality in two coats over a base coat 17.00 Sq. M 4369.00 170 17 15.00 steel work for window and 12150.00 327 ventilation 810.00 Sq. M 18 20.00 Rolling shutter of approved design 770.00 Sq. M 15400.00 353


148


Sr. No. 19

20 21 22 23 24 25 26 27 28 29 30

31 32 33 34 34

35 36

37

Quantity

Cost Estimate

Description

30.00 Kota stone polished tiles of average 18 to 25 mm thick etc complete 39.20 Mosaic tiles Rain water pipe AC 75 mm dia 25.00 comp Fan hooks from MS bar of 12 mm 8.00 dia 30.00 Fixing CI steps etc complete MS section of various size 290.00 channel, angle girder etc 28.60 CC in M25 for bottom slab without centering 138.75 CC in M25 for vertical walls 4.15 CC in M25 for top slab 2.75 CC in M-25 for beams 33.30 Bottom IPS 50 mm thick 322.00 Cement plaster 20 mm thick in CM 1:3 with water proofing to RCC wall inside 30.00 116.00 1.00 30.00 1.00

Providing & Supplying CI coevals Providing CI MH cover & frames fixing of MH frame and cover Fixing Coevals in the Slab providing and fixing water level indicator

1500.00 Supplying MS special flange Providing, cutting, placing, TOR 231.00 steel including binder wires etc comp with anticorrosive treatment. -- Gates misc. and job work

Rate

Per

240.00 159.00

Sq. M Sq. mt

Amount

7200.00 6232.80

SOR No.

191 202

rmt

0.00

22.00 138.00

No No

176.00 4140.00

1091

39.80

Kg

11542.00

823

cum cum cum Sq. mt Sq. mt

66323.40 555000.00 11902.20 8258.25 2564.10

gwssb d4-11+5 do 1-v1 291 294 208

59.00

rmt

18998.00

88.00 21.00 2000.00 63.55 2450.00

No No No No No

2640.00 2436.00 2000.00 1906.50 2450.00

157 gwssb 15/160 gwssb MR gwssb gwssb

50.00

Kg

75000.00

WWB 302

3600.00

Qtl

831600.00

gwssb

LS

--

100000.00 2108705.40 2109000.00

MR

2319.00 4000.00 2868.00 3003.00 77.00

Say


149


Cost Estimate

RAJKOT MUNICIPAL CORPORATION Name of Work : Design, Construction, testing and commissioning of civil component of sewage pumping station under sewage project phase-III ( Part-1) for Riaya main drainage pumping station MPS Abstract-A Sr. Quantity Description Rate Per Amount SOR No. No. 1 EXCAVATION 1.1 0.00 to 1.5 mt depth 39.50 1.1.1 1575.00 in all soil soft/hard murrum cum 62212.50 23+28/2 1.51 to 3 mt depth in hard 210.00 1.1.2 1495.00 rock cum 313950.00 39 240.00 1.1.3 1480.00 3.00 to 4.50 mt in hard rock cum 355200.00 40 295.00 1.1.4. 1400.00 4.50 to 6.00 mt hard rock cum 413000.00 11 337.00 1.1.5 395.00 6.00 to 7.50 mt hard rock cum 133115.00 42 1:3:6 CC in foundation with 1230.00 15 mm to 20 mm size kapchi 2 138.50 etc complete cum 170355.00 278 3 31.00 Brick masonry in CM 1:6 in 1059.00 cum 32829.00 114 foundation and plinth 1:2:4 CC for plinth beam 2358.00 with foam work including 4 7.50 finishing etc cum 17685.00 294 950.00 Refilling the trench in plinth materials brought from 60.00 5 cum 57000.00 103 outside Brick masonry in super 1059.00 structure in CM 1:6 etc 6 261.00 complete cum 276399.00 114 7 12.00 RCC 1:2:4 for footing of 1890.00 columns with centering shuttering cum 22680.00 300 8 113.20 RCC 1:2:4 for slab with 12 mm to 20 mm size machine crushed kapchi and 2222.00 necessary centering and shuttering etc complete cum 251530.40 291 2358.00 9 16.85 do for beams cum 39732.30 294 2660.00 10 3.45 do for chhajas cum 9177.00 295 2422.00 11 19.50 do for columns cum 47229.00 292 2440.00 12 5.75 do for lintel cum 14030.00 293 12 mm thick sand face cement plaster in CM 1:3 59.00 with spunging etc complete 13 748.00 in two coats Sq. M 44132.00 157 12 mm thick cement plaster 42.00 14 798.00 incl. finishing in CM 1:3 Sq. M 33516.00 146 Water bound distemper in 2 12.25 15 798.00 coats Sq. M 9775.50 168 16 748.00 Snowcem color of approved quality in two coats over a base coat Sq. M 12716.00 170 17.00


150


Sr. Quantity Description No. 17 36.00 steel work for window and ventilation 18 26.00 Rolling shutter of approved design and quality with two coat of oil paint etc complete. 19 286.00 Kota stone polished tiles of average 18 to 25 mm thick etc complete 20 1088.00 Mosaic tiles 21 130.00 Rain water pipe CI 100 mm dia comp 22 Fan hooks from MS bar of 30.00 12 mm dia 23 60.00 Fixing CI steps etc complete MS section of various size 24 30.00 channel, angle girder etc 25 395.00 CC in M25 for bottom slab without centering 26 353.00 CC in M25 for vertical walls 27 50.75 CC in M25 for top slab 28 2.50 CC in M15 for RCC stair 29 19.70 CC in M-25 for beams 30 572.00 Bottom IPS 50 mm thick Cement plaster 20 mm thick in CM 1:3 with water 31 1429.00 proofing to RCC wall inside 32 40.00 Providing and supplying CI coevals Providing CI MH cover & 33 1800.00 frames fixing of MH frame and 34 2.00 cover 35 60.00 Fixing coevals in the slab providing and fixing water 36 1.00 level indicator 37 5000.00 Supplying MS special flange 38 1175.00 Providing, cutting, placing, TOR steel including binder wires etc comp 39 -Gates misc. and job work

Cost Estimate

Rate

Per

Amount

SOR No.

810.00

Sq. M

29160.00

327

770.00

Sq. M

20020.00

353

240.00 159.00

Sq. M Sq. mt

68640.00 172992.00

178.00

rmt

23140.00

191 202 gwssb 17/160

22.00 138.00

No No

660.00 8280.00

1091

39.80

Kg

1194.00

823

916005.00 1412000.00 145551.00 4640.00 59159.10 44044.00

gwssb d4-11+5 do 1-v1 291 299 294 208

2319.00 4000.00 2868.00 1856.00 3003.00 77.00

cum cum cum cum Sq. mt Sq. mt

59.00

rmt

84311.00

88.00

No

3520.00

157 gwssb 15/160

21.00

No

37800.00

gwssb

2000.00 63.55

No No

4000.00 3813.00

MR gwssb

2450.00 50.00

No Kg

2450.00 250000.00

gwssb WW 302

3600.00 LS

Qtl --

4230000.00 500000.00 10337642.80 10338000.00

gwssb MR

Say Rs. Plus Compound wall as per Abstract-B Total Amount Rs.

776000.00 11114000.00


151


Cost Estimate

NAME OF WORK : CONSTRUCTION OF COMPOUND WALL AT RAIYA MAIN DRAINAGE PUMPING STATION ( DRAINAGE PHASE-III ) PART-1 Abstract-B No Quantity Description Rate Per Amount SOR 1

80.00

Excavation for foundation in soft and hard murrum with average rate and depth up to 1.50 mt. with clearing the site by shifting & spreading excavated stuff up to 90 mt. lead, as per instruction

2

44.00

3

142.00

4 5 6 7

57.00 36.00 34.00 2874.00 903.00

39.50

Cu. Mt.

3160.00

23+28/2

Foundation masonry with rubble cement mortar in 1:6 cement :sand proportion

494.00

Cu. Mt.

21736.00

64

Rubble plinth masonry work in C.M. 1:6 & with cement pointing 1:3 C.C. Coping work 1:2:4 C.C. Footing with 1:2:4 C.C. Column with 1:2:4 TOR steel work for R.C.C. work M.S. Round steel work comp. for R.C.C. work Brick masonry with C.M. 1:6 Supplying & fixing 110mm. PVC. Pipe of 4Kg/Cm^2 with required specials

536.00

Cu. Mt.

76112.00

70

1459.00 1890.00 2422.00 33.00 31.80

Cu. Mt. Cu. Mt. Cu. Mt. Kg. Kg.

83163.00 68040.00 82348.00 94842.00 28715.40

136 300 292 302 301

1059.00 141.00

Cu. Mt. Rmt.

152496.00 3948.00

114 883

8 9 10

144.00 28.00

11

93.00

Supplying & fixing 90mm. PVC. Pipe of 4Kg/Cm^2 with spec

101.00

Rmt.

9393.00

882

12

1247.00

57.00

Sq. Mt.

71079.00

150

13

1236.00

17.00

Sq. Mt.

21012.00

170

14 15

985.00 720.00

39.80 7.00

Kg. Sq. Mt.

39203.00 5040.00

823 538

16

75.00

8.00

Nos.

600.00

540

17

70.00

6.00

Rmt.

420.00

1029

18

25.00

Sand face cement plaster 20mm thick In C.M. 1:3 ( Double Coat) Water Proof cement paint two coat or base coat Steel work as per instruction Supplying & Fixing Barbed wire in Fencing Fixing steel angle on proper alignment Oil paint work for Steel, Angle and Railing with two shades Oil paint work for Door, Windows, Grills etc. with 2 coats

23.00

Sq. Mt.

575.00

473

19 20

11.00 35.00

1097 37.00

Cu. Mt. Sq. Mt.

12067.00 1295.00

61 147

21

16.00

P.C.C. 1:3:6 Cement plaster Rough cast in C.m. 1:3 Cement plaster with niru finishing

42.00

Sq. Mt.

672.00 146 775916.40 Say …………….Rs..776000.00



152


Cost Estimate

9.4.4 Estimates of Rising Mains (PS pipes) of Phase-III (Part-1) Detailed Estimate for Pumping Main Pipeline For Auxiliary Pumping Station Of Mavdi ( APS - 1 ) Item Quantity Description No. 1 Excavation of pipeline trenches and valve chamber incl. all safety provisions using rails etc including refilling the trenches & stacking the excavated stuff upto a lead of 90mt as directed In all sorts of soil, soft murrum, hard murrum & macadam roads. 1020.00 up to 0 - 1.50 mt. 255.00 Do- in soft & hard rock 425.00 Up to 1.50 to 3.0 mt. Do- in soft & hard rock 2 Providing sand or murrum bedding incl. comp. 63.00 From selected excavated earth 63.00 From outside beyond 2.0 km lead 3 840.00 Providing & supplying 400 mm dia. ISI standard P.S.C. pipes in standard lengths of 12 kg/cm2 class of 400 mm dia as per I.S. 784-1989 incl. Rubber ring joints incl. All taxes etc supply at site. 4 840.00 Lowering laying & jointing P.S.C. pipes & specials of 400 mm dia. Including all required materials in proper position, grade and alignment as directed incl. Giving hydraulic test etc. comp. 5 5000.00 Providing M.S. specials like Bends, Flanged Tee, etc. suitable to P.S.C. 400 mm pipe incl. all taxes etc. comp. 6 20.00 1:3:6 CC (M 100) for encasing the pipes incl. Finishing etc. comp. 7 15.00 1:2:4 CC (M 150) for RCC thrust blocks over the pipes with centering incl. Finishing etc. comp. 8 1.00 Providing Sluice valve 400 mm dia PN-1 class IS 2906 ISI marked incl. all taxes. 9 1.00 Fixing of Sluice valve in position with all fittings & materials for 400 mm dia. 10 5.00 Providing double acting Air valve of 150 mm dia.

Rate Rs.

Per

Amount

39.50 135.00 166.50

cu mt. cu mt. cu mt.

40290.00 34425.00 70762.50

11.00 27.50 1431.00

cu mt. cu mt. Rmt.

693.00 1732.50 1202040.00

SOR No.

23+28/2 33+38/2 34+39/2

15/A p-66 15/B p-67

MR

48.00

Rmt.

40320.00 9/4/61

58.75

Kg.

293750.00 WW/345

1170.00

cu mt.

23400.00

1500.00

cu mt.

22500.00

36415.00

cu mt.

36415.00

616/2

ww/A/135 350.00

cu mt.

350.00 ww/B/73

2645.00


No.s

13225.00

ww/A/147

153


Item Quantity Description No. 11 5.00 Fixing double acting Air valve of 150 mm dia incl. all fitting materials etc. comp. 12 6.00 Construction of valve chamber in 23 cm thick Brick masonry in CM 1:6 Fdn C.C. 1:4:8, inside 12 mm cement plaster in C.M. 1:3 etc. incl. RCC slab 100 mm tk. With Key hole in two parts, each with handles of M.S. bars etc upto depth of 1 mt from G.L. to pipe invert. Excluding cost of excavation. For chamber size 1.3m * 0.90m and 1 mt deep. 13 185.00 Remove surplus earth within the corporation limits including spreading etc. comp. 14 800.00 Breaking of Aphalt pavement surface Conventional 15 800.00 Road re-instating work. WBM 16 800.00 Asphalt

Cost Estimate

Rate Rs.

Per

85.00

No.s

Amount

SOR No.

425.00 ww/B/83

3390.00

No.s

20340.00

C/B/1

33.00

6105.00 712

18.00

14400.00 43

55.00

44000.00

85.00

68000.00

Total Estimated Amount in Rs. Say Rs.


MR MR

1933173.00 19,34,000.00

154


Cost Estimate

Detailed Estimate for Pumping Main Pipeline For Auxiliary Pumping Station Of Kalawad Road ( APS - 2 ) Item Quantity Description Rate Rs. Per Amount Rs. SOR No. No. 1 Excavation of pipeline trenches and valve chamber incl. all safety provisions using rails etc including refilling the trenches & stacking the excavated stuff upto a lead of 90mt as directed In all sorts of soil, soft murrum, hard murrum & macadam roads. 3776.00 up to 0 - 1.50 mt. 39.50 cumt. 149152.00 23+28/2 958.00 Do- in soft & hard rock 135.00 cumt. 129330.00 33+38/2 3192.00 Up to 1.50 to 3.0 mt. 166.50 cumt. 531468.00 34+39/2 Do- in soft & hard rock 2 Providing sand or murrum bedding incl. comp. 235.00 From selected excavated earth 11.00 2585.00 15/A p-66 235.00 From outside beyond 2.0 km 27.50 6462.50 15/B p-67 lead 3 1566.00 Providing & supplying 900 5341626.00 3411.00 Rmt. mm dia. ISI standard P.S.C. pipes in standard lengths of 12 20/D/5 kg/cm2 class of 900 mm dia as per I.S. 784-1989 incl. Rubber ring joints incl. All taxes etc supply at site. 4 1566.00 Lowering laying & jointing 219240.00 140.00 Rmt. P.S.C. pipes & specials of 900 mm dia. Including all required materials in proper position, 9/12/61 grade and alignment as directed incl. Giving hydraulic test etc. comp. 5 10000.00 Providing M.S. specials like 587500.00 58.75 Kg. Bends, Flanged Tee, etc. WW/345 suitable to P.S.C. 900 mm pipe incl. all taxes etc. comp. 6 70.00 1:3:6 CC (M 100) for encasing 81900.00 1170.00 cumt. 616/2 the pipes incl. Finishing etc. comp. 7 25.00 1:3:6 CC (M 150) for RCC 37500.00 1500.00 cumt. thrust blocks over the pipes 281 with centering incl. Finishing etc. comp. 8 1.00 Providing Sluice valve 900 299000.00 299000.00 cumt. WW/A/141 mm dia PN-1 class IS 2906 ISI marked incl. all taxes.


155


Item No. 9

10 11

12

13

14

15 16 17

Quantity

Cost Estimate

Description

1.00 Fixing of Sluice valve in position with all fittings & materials for 900 mm dia. 12.00 Providing double acting Air valve of 200 mm dia. 12.00 Fixing double acting Air valve of 150 mm dia incl. all fitting materials etc. comp. 13.00 Construction of RCC valve chamber in 15 cm thick walls with inside 12 mm cement plaster in C.M. 1:3 etc. incl. pre-cast RCC slab 150 mm tk. in four parts, with key hole each with handles of M.S. bars etc upto depth of 2 mt from G.L. to pipe invert. Excluding cost of excavation. For chamber size 2.0 m * 2.0 m and 2 mt deep. 2300.00 Remove surplus earth within the corporation limits including spreading etc. comp. 3152.00 Breaking of Asphalt pavement surface Conventional 1566.00 Paver surface Road re-instating work. 3152.00 WBM 1566.00 Asphalt

Rate Rs.

Per

785.00 cumt.

Amount Rs.

SOR No.

785.00 WW/B/80

5700.00

No.s

68400.00

85.00

No.s

1020.00

WW/A148 WW/B/84

12000.00

156000.00

MR

33.00

75900.00 712

18.00

56736.00 43

26.00

40716.00

55.00 85.00

173360.00 133110.00

Total Estimated Amount in Rs. Say Rs.


MR MR

8091790.50 80,92,000.00

156


Cost Estimate

Detailed Estimate for Pumping Main Pipeline For Auxiliary Pumping Station Of Gandhigram ( APS - 3 ) Ite m No. 1

2

3

4

5

6 7

8

9 10

Qty

Description

Excavation of pipeline trenches and valve chamber incl. all safety provisions using rails etc including refilling the trenches & stacking the excavated stuff upto a lead of 90mt as directed In all sorts of soil, soft murrum, hard murrum & macadam roads. 790.00 up to 0 - 1.50 mt.

Rate Rs.

Per

39.50

cumt . cumt . cumt .

198.00 Do- in soft & hard rock

135.00

330.00 Up to 1.50 to 3.0 mt.

166.50

Do- in soft & hard rock Providing sand or murrum bedding incl. comp. 50.00 From selected excavated earth

11.00

50.00 From outside beyond 2.0 km lead

27.50

650.00 Providing & supplying 400 mm dia. ISI standard P.S.C. pipes in standard lengths of 12 kg/cm2 class of 400 mm dia as per I.S. 784-1989 incl. Rubber ring joints incl. All taxes etc supply at site. 650.00 Lowering laying & jointing P.S.C. pipes & specials of 400 mm dia. Including all required materials in proper position, grade and alignment as directed incl. Giving hydraulic test etc. comp. 4000.00 Providing M.S. specials like Bends, Flanged Tee, etc. suitable to P.S.C. 400 mm pipe incl. all taxes etc. comp. 20.00 1:3:6 CC (M 100) for encasing the pipes incl. Finishing etc. comp. 15.00 1:2:4 CC (M 150) for RCC thrust blocks over the pipes with centering incl. Finishing etc. comp. 1.00 Providing Sluice valve 400 mm dia PN1 class IS 2906 ISI marked incl. all taxes. 1.00 Fixing of Sluice valve in position with all fittings & materials for 400 mm dia. 5.00 Providing double acting Air valve of 150 mm dia.

1431.00

cumt . cumt . Rmt.

Amount Rs.

31205.00 26730.00 54945.00

SOR No.

23+28/ 2 33+38/ 2 34+39/ 2

550.00 15/A p66 1375.00 15/B p67 930150.00 MR

48.00

Rmt.

31200.00 9_4_61

58.75

Kg.

235000.00

1170.00

cumt . cumt .

23400.00

36415.00

cumt .

36415.00

350.00

cumt . No.s

350.00

1500.00

2645.00


WW/3 45 616/2

22500.00

13225.00

ww/A/ 135 ww/B/ 73 ww/A/ 147

157


Ite m No. 11

12

14

15

16 17 18

Qty

Cost Estimate

Description

5.00 Fixing double acting Air valve of 150 mm dia incl. all fitting materials etc. comp. 6.00 Construction of valve chamber in 23 cm thick brick masonry in C.M. 1:6 with fdn. of C.C. 1:4:8 inside 12 mm cement plaster in C.M. 1:3 etc. incl. RCC slab 100 mm Tk. With key hole in two parts, each with handles of M.S. bars etc up to depth of 1 mt from G.L. to pipe invert. Excluding cost of excavation. For chamber size 1.3m x 0.90 and 1.0mt deep. 125.00 Remove surplus earth within the corporation limits including spreading etc. comp. 325.00 Breaking of Asphalt pavement surface Conventional 132.00 Paver surface 650.00 Road re-instating work. WBM 455.00 Asphalt

Amount Rs.

Rate Rs.

Per

85.00

No.s

425.00

3390.00

No.s

20340.00

SOR No. ww/B/ 83

C/B/1

33.00

18.00

cumt .

4125.00

m2

5850.00

712

43 26.00 55.00 85.00

m2 m2 m2

3432.00 35750.00 38675.00

MR MR

Total Estimated Amount in Rs.

1515642.00

Say Rs.

15,16,000.00


158


Cost Estimate

Detailed Estimate for Pumping Main Pipeline For Auxiliary Pumping Station Of Raiya village ( MPS ) Ite m No. 1

Qty

4872.00 1218.00 4060.00 2 300.00

Description Excavation of pipeline trenches and valve chamber incl. all safety provisions using rails etc including refilling the trenches & stacking the excavated stuff upto a lead of 90mt as directed In all sorts of soil, soft murrum, hard murrum & macadam roads. up to 0 - 1.50 mt. Do- in soft & hard rock Up to 1.50 to 3.0 mt. Do- in soft & hard rock Providing sand or murrum bedding incl. comp. From selected excavated earth

300.00 From outside beyond 2.0 km lead 3

4

5

6 7

8

2000.00 Providing & supplying ISI standard P.S.C. pipes in standard lengths of 12 kg/cm2 class of 900 mm dia as per I.S. 784-1989 incl. Rubber ring joints incl. All taxes etc supply at site. 2000.00 Lowering laying & jointing P.S.C. pipes & specials of 900 mm dia. Including all required materials in proper position, grade and alignment as directed incl. Giving hydraulic test etc. comp. 8000.00 Providing M.S. specials like Bends, Flanged Tee, etc. suitable to P.S.C. 900 mm pipe incl. all taxes etc. comp. 150.00 1:3:6 CC (M 100) for encasing the pipes incl. Finishing etc. comp. 40.00 1:2:4 CC (M 150) for RCC thrust blocks over the pipes with centering incl. Finishing etc. comp. 2.00 Providing Sluice valve 900 mm dia PN-1 class IS 2906 ISI marked incl. all taxes.

Rate Rs.

Per

Amount Rs.

SOR No.

39.50 cumt. 135.00 cumt. 166.50 cumt.

192444.00 23+28/2 164430.00 33+38/2 675990.00 34+39/2

11.00 cumt.

3300.00 15/A p66 7590.00 15/B p67 6822000.00

25.30 cumt. 3411.00

Rmt.

20/D/5

140.00

Rmt.

280000.00 9_12_61

58.75

Kg.

470000.00 WW/345

1170.00

cumt.

175500.00

1500.00

cumt.

60000.00

616/2 281

299000.0 0


No.s

598000.00

WW/A/1 41

159


Ite m No. 9

10 11

12

13 14

15

16

Qty

Cost Estimate

Description

2.00 Fixing of Sluice valve in position with all fittings & materials for 900 mm dia. 12.00 Providing double acting Air valve of 200 mm dia. 12.00 Fixing double acting Air valve of 150 mm dia incl. all fitting materials etc. comp. 14.00 Construction of R.C.C. valve chamber in 15 cm thick walls with inside 12 mm cement plaster in C.M. 1:3 etc. incl. Pre cast RCC slab 150 mm Tk. in four parts. With key hole, each with handles of M.S. bars etc up to depth of 2 mt from G.L. to pipe invert. Excluding cost of excavation. For chamber size 2.0m x 3.0m and 2.0mt deep. 10.00 - Do for extra depth 2940.00 Removing surplus earth within the corporation limits including spreading etc. comp. 500.00 Breaking of Asphalt pavement surface Conventional Road re-instating work. 500.00 WBM 500.00 Asphalt Total Estimated Amount in Rs. Say Rs.

Rate Rs.

Per

785.00

cumt.

5700.00

No.s

85.00

No.s

12000.00

No.s

Amount Rs. 1570.00

SOR No. WW/B/8 0

68400.00 WW/A14 8 1020.00 WW/B/8 4 168000.00

MR

1300.00 RM 33.00 cumt.

18.00

m2

13000.00 MR 97020.00 712 9000.00 43

55.00 85.00

m2 m2

MR 27500.00 42500.00 MR 9877264.00 98,78,000.00



160


Cost Estimate

9.3.5 Estimates of Pumping Machinery & Erections of Phase-III (Part-1)

Design, procurement, manufacture supply, erection & commissioning with sludge handling pumps & pump house piping for Three Auxiliary Pumping Stations APS - 1, APS - 2, APS - 3 & Main pumping station for drainage Phase-III BILL OF QUANTITIES FOR PUMPING MACHINERY Item No.

1.0

2.0

3.0

4.0

Description Design procurement, manufacture supply, storage at site loading, unloading, transporting, erection, testing and commissioning of Submersible Sewage handling pumps & pump house piping etc. complete. For MAVDI APS - 1 pumping station Sets of 67 LPS 15 mt. head (2+1 sets). Approx. H.P. 30/pump. For GANDHIGRAM APS - 3 pumping station Sets of 28 LPS 17 mt. head (2+1 sets). Approx. H.P. 25/pump. Design procurement, manufacture supply, storage at site loading, unloading, transporting, erection, testing and commissioning of Horizontal split casing non clogged Solid handling pumps & pump house piping etc. complete. For KALAWAD ROAD APS - 2 pumping station Sets of 82 LPS 17 mt. head (4 + 2 sets). Approx. H.P. 65/pump. For MPS - near village Raiya Main pumping station Sets of 331 LPS 15 mt. head (4+2 sets). Approx. H.P. 105/pump. TOTAL COST OF PUMPING MACHINERY

Amount Rs.

22,50,000.00

18,75,000.00

78,00,000.00

1,26,00,000.00

2,45,25,000.00

Total KW •

Main Load = 884 KW

•

Auxillary Load = 97 KW

•

Total

•

Rate per KW Rs.25000/- as per Market Rate

•

Therefore Total = 981 x Rs.25000/- =Rs.2,45,25,000/-

= 981 KW


161


Cost Estimate

BOQ / Schedule showing list of material and services to be supplied. Sr. No. 1

2

3

4

Particulars PART - A Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of Submersible Sewage handling pumps with motors, each of capacity 67 LPS and head 15 mt. make Aqua, Kishor, ABS, Pullen. Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of all suction, delivery an other pipe work C.I. double flanged including specials, specials, spectacle blinds gaskets, nuts bolts etc. and painting as per approved pump house piping drawing, with bypass arrangement of each pump. Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading transportation, storage as site, loading & unloading, erection, testing and commissioning of all sluice valve, reflux valve etc. complete as per valve schedule. Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of pressure gauges with necessary piping, isolation valves & drain valves complete.

Qty. 3 Nos.

1 Lot.

1 Lot.

2 Nos.

5

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of level indicators.

1 Nos.

6

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of 2T capacity Chain pulley block with 12 -15 meter lift with trolley (for monorail). Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of fire extinguisher. Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of First Aid Kit with additional steel cupboard.

1 Nos.

7 8

9

10 Sr. No. 1

2

3 4

2 Nos. 1 Nos.

Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of Erection and maintenance manuals.

2 Sets.

Operation and maintenance manuals.

3 Sets.

Particulars PART - B Design, Procurement, supplying, erection and commissioning of 415V motor control center including required AMP capacity M.C.C.B./ACB with fuse unites fully automatic start delta starters, protection relays and all delta starters, protection relays and all measuring instrument bus bars and bus coupler. Capacitor bank etc. complete one unit for 3 sets. Design, Procurement, supply, Erection, Testing and Commissioning of 1.1 KV grade PVC Insulated power and control cable of Unistar / CCI / INCAB / FORT Gloster make with accessories. Design procurement, Supply, Erection, Testing and Commissioning of earthing system for complete pumping station installation. Design, procurement, Supply, Erection, Testing and Commissioning of lighting, system (Indoor and Outdoor both) for complete pumping station installation fixtures shall be of Philips / Crompton / Bajaj.


Qty. 1 Lot.

1 Lot.

1 Lot. 1 Lot.

162


Cost Estimate

DESIGN, PROCUREMENT, MANUFACTURE, SUPPLY, STORAGE AT SITE, ERECTION, TESTING & COMMISSIONING OF PUMPS, MOTORS, ELECTRIC EQUIPMENTS, INSTRUMENTATION & PUMPS HOUSE PIPING COMPLETE FOR

APS-3 (GANDHIGRAM). Sr. No. 1

2

3

BOQ / Schedule showing list of material and services to be supplied. Particulars Qty. PART - A Design, Procurement, manufacture, supply at site including transportation, 3 Nos. storage at site loading and unloading, erection, testing and commissioning of Submersible Sewage handling pumps with motors, each of capacity 28 LPS and head 17 mt. make Aqua, Kishor, ABS, Pullen. Design, Procurement, manufacture, supply at site including transportation, 1 Lot. storage at site loading and unloading, erection, testing and commissioning of all suction, delivery an other pipe work C.I. double flanged including specials, specials, spectacle blinds gaskets, nuts bolts etc. and painting as per approved pump house piping drawing, with bypass arrangement of each pump. Design, Procurement, manufacture, supply at site including transportation, 1 Lot. storage at site loading and unloading transportation, storage as site, loading & unloading, erection, testing and commissioning of all sluice valve, reflux valve etc. complete as per valve schedule.

4

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of pressure gauges with necessary piping, isolation valves & drain valves

5


6

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of 2T capacity Chain pulley block with 12 - 15 meter lift with trolley (for monorail)

1 Nos.

7

Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of fire extinguisher. Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of First Aid Kit Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of Erection

2 Nos.


3 Sets.

8 9 10 Sr. No. 1

2

3 4

Particulars PART - B Design, Procurement, supplying, erection and commissioning of 415V motor control center including required AMP capacity M.C.C.B./ACB with fuse unites fully automatic start delta starters, protection relays and all delta starters, protection relays and all measuring instrument bus bars and bus coupler. Capacitor bank etc. complete one unit for 3 sets. Design, Procurement, supply, Erection, Testing and Commissioning of 1.1 KV grade PVC Insulated power and control cable of Unistar / CCI / INCAB / FORT Gloster make with accessories. Design procurement, Supply, Erection, Testing and Commissioning of earthing system for complete pumping station installation. Design, procurement, Supply, Erection, Testing and Commissioning of lighting, system (Indoor and Outdoor both) for complete pumping station installation fixtures shall be of Philips / Crompton / Bajaj.


2 Nos.

1 Nos. 2 Sets.

Qty. 1 Lot.

1 Lot.

1 Lot. 1 Lot.

163


Cost Estimate

APS-2 (KALAWAD ROAD). Sr. No. 1

BOQ / Schedule showing list of material and services to be supplied. Particulars Qty. PART - A Design, Procurement, manufacture, supply at site including transportation, 6 Nos. storage at site loading and unloading, erection, testing and commissioning of Horizontal centrifugal non clog solid handling type pumps, each of capacity 82 LPS and head 17 mt. make Kirloskar, Mather Plat, Jyoti, Becon.

2

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of all suction, delivery an other pipe work C.I. double flanged including specials, specials, spectacle blinds gaskets, nuts bolts etc. and painting as per approved pump house piping drawing, with bypass arrangement of each pump.

1 Lot.

3

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading transportation, storage as site, loading & unloading, erection, testing and commissioning of all sluice valve, reflux valve etc. complete as per valve schedule. Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of pressure gauges with necessary piping, isolation valves & drain valves complete. Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of level indicators.

1 Lot.

6

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of 2T capacity Chain pulley block with 12 -15 meter lift with trolley (for monorail).

1 No.

7

Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of fire extinguisher.

2 No.

8

Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of First Aid Kit with additional steel cupboard.

1 No.

9


2 Sets.


3 Sets.

4

5

10 Sr. No. 1

2

3

4 5

Particulars PART - B Design, Procurement, supplying, erection and commissioning of 415V motor control center including required AMP capacity M.C.C.B./ACB with fuse unites fully automatic start delta starters, protection relays and all delta starters, protection relays and all measuring instrument bus bars and bus coupler. Capacitor bank etc. complete one unit for 6 sets. Design, Procurement, supply, Erection, Testing and Commissioning of 415 KV, 1500 RPM Syn, Speed, Squirrel Cage induction motors of Kirloskar, Jayoti ,Crompton, Siemens, NGEF make suitahble for pumping duty. Design procurement, Supply, Erection, Testing and Commissioning of 1.1 KV grade PVC Insulated power and control cable of Unistar / CCI / INCAB / FORT Gloster make with accessories. Design procurement, Supply, Erection, Testing and Commissioning of earthing system for complete pumping station installation. Design, procurement, Supply, Erection, Testing and Commissioning of lighting, system (Indoor and Outdoor both) for complete pumping station installation fixtures shall be of Philips / Crompton / Bajaj.


2 No.

1 No.

Qty. 1 Lot.

6 Nos.

1 Lot.

1 Lot. 1 Lot.

164


Cost Estimate

DESIGN, PROCUREMENT, MANUFACTURE, SUPPLY, STORAGE AT SITE, ERECTION, TESTING & COMMISSIONING OF PUMPS, MOTORS, ELECTRIC EQUIPMENTS, INSTRUMENTATION & PUMPS HOUSE PIPING COMPLETE FOR

MAIN PUMPING STATION (RAIYA). BOQ / Schedule showing list of material and services to be supplied. Sr. No. 1

Particulars PART - A Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of Horizontal centrifugal non clog solid handling type pumps, each of capacity 331 LPS and head 15 mt. make Kirloskar, Mahter Plat, Jyoti, Becon.

2

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of all suction, delivery an other pipe work C.I. double flanged including specials, specials, spectacle blinds gaskets, nuts bolts etc. and painting as per approved pump house piping drawing, with bypass arrangement of each pump.

1 Lot.

3

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading transportation, storage as site, loading & unloading, erection, testing and commissioning of all sluice valve, reflux valve etc. complete as per valve schedule.

1 Lot.

4

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of pressure gauges with necessary piping, isolation valves & drain valves complete.

2 Nos.

5


1 No.

6

Design, Procurement, manufacture, supply at site including transportation, storage at site loading and unloading, erection, testing and commissioning of 2T capacity Chain pulley block with 12 -15 meter lift with trolley (for monorail).

1 No.

7

Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of fire extinguisher.

2 No.

8

Design, Procurement, manufacture, supply at site including transportation, loading and unloading at site, and mounting of First Aid Kit with additional steel cupboard.

1 No.

9


2 Sets.


3 Sets.

10


Qty. 6 Nos.

165


Sr. No. 1

Cost Estimate

Particulars PART - B Design, Procurement, supplying, erection and commissioning of 415V motor control center including required AMP capacity M.C.C.B./ACB with fuse unites fully automatic start delta starters, protection relays and all delta starters, protection relays and all measuring instrument bus bars and bus coupler. Capacitor bank etc. complete one unit for 6 sets.

Qty. 1 Lot.

2

Design, Procurement, supply, Erection, Testing and Commissioning of 415 KV, 1500 RPM Syn, Speed, Squirrel Cage induction motors of Kirloskar, Jayoti ,Crompton, Siemens, NGEF make suitahble for pumping duty.

6 Nos.

3

Design procurement, Supply, Erection, Testing and Commissioning of 1.1 KV grade PVC Insulated power and control cable of Unistar / CCI / INCAB / FORT Gloster make with accessories.

1 Lot.

4

Design procurement, Supply, Erection, Testing and Commissioning of earthing system for complete pumping station installation.

1 Lot.

5

Design, procurement, Supply, Erection, Testing and Commissioning of lighting, system (Indoor and Outdoor both) for complete pumping station installation fixtures shall be of Philips / Crompton / Bajaj.

1 Lot.



166


Cost Estimate

9.4.6 Estimates of Sewage Treatment Plant & Disposal of Phase-III (Part-1) Drainage Phase-III ( New Area) (PART-II) DESIGN, CONSTRUCTION, PROCUREMENT, MANUFACTURE, SUPPLY, STORAGE AT SITE, ERECTION, TESTING AND COMMISSIONING OF ALL MECHANICAL AND ELECTRIC EQUIPMENTS, INSTRUMENTATION AND ALL PIPINGS ETC COMPLETE FOR SEWAGE TREATMENT PLANT OF 51 MLD CAPACITY TO BE CONSTRUCTED AT RAIYA DHAR RAJKOT Sr Qty Description Rate Unit Amount No Work of design, engineering, 1 51 supply of materials, construction, 2500000/- 1 MLD 12,50,00,000/MLD erection and installation of cap. equipment, machinery, piping, instruments, painting works, including civil and structural work, and testing and commissioning successful 3 months trial runs and training RMC operating personnel. Operating and maintaining the sewage treatment plant proposed near existing sewage treatment plant at Raiya for 12 months including guaranteeing the entire plant and its performance and treated effluent quality, all labour, materials, piping, instruments, etc complete as per scope of work, special conditions of contract, design, drawings and specifications approved by the department and as per directions of Engineer-incharge. 2 8000 Construction of internal road 125/- Sqmt 10,00,000/Sq.mt 3 2500 Construction of Compound wall 15,00,000/Rmts (as per the estimate ) Total Estimated Cost in Rs 12,75,00,000/Say Rs. in Lakhs 1275/Rupees Twelve Crore Seventy Five Lakhs only/-

Detailed break up of cost of Sewage Treatment Plant 1. Civil works Rs. 18.23 Lakh per MLD 2. Mechanical / Electrical/ Automation work Rs. 5.85 Lakh per MLD 3. Piping work Rs. 0.92 Lakh per MLD -----------------------------Total Rs.25.00 Lakh per MLD ___________ City Engineer Rajkot Municipal Corporation


167


Item No. 1

2

3

4

5

Qty.

Cost Estimate

:: A B S T R A C T FOR ESTIMATE :: Phase-III Part-I Short Description of Rate Unit Amount work. In Figure Rs. Ps.

2500.00 Providing and fixing Rmt pre-cast RCC column and slab as per specification complete (including the cost of transportation) 145.00 Excavation in soft and Cu.Mt hard murrum upto 1.50 mt depth complete. 145.00 Cement concrete work Cu.Mt for fixing the columns in 1:2:4 proportion using 1.5 to 2.0 cm size coarse agg., curing etc. complete. 2500.00 Fixing present RCC Rmt column and slab in line and level, jointing the same with cement paste as per specification, curing etc complete. 150.00 Supplying of hard Cu.Mt murrum and spreading the same as per instruction complete.

456.00 Rmt

39.50 Cumt

S.O.R. Number

11,40,000/- MR

5727-50 23+28 2

1450.00 Cumt

2,10,250/- 62

74.00 Rmt

1,85,000/- MR

55.00 Cumt

Total Say

8250/- 702

14,99,227-50 15,00,000-00 (Rupees Fifteen lakhs only)



168


Cost Estimate

9.5 Total Estimates of Drainage Work Phase-II & Phase-III (Part-1) Sr No 1 2 3 4 5

1 2 3 4 5 6



Phase-II (Part-I) Collective system and house connections 600 Installation of additional non-clog C.F. pumping 285 machinery in existing pump house Extension of sewage treatment plant with extended 1120 aeration process with sludge digester 44.5 mld capacity. Additional power connection at Madhapar plant 30 Compound wall at Madhapar plant 15 Total…..A 2050 Phase-III (Part-I) Collective system 1860.76 House connections 1404.59 Pumping Station Civil Works 293.06 Pumping Station Rising Mains Works 139.60 Pumping Station Machinery Works 245.25 Sewage Treatment Plant 1328.81 5272.07 Total…..B 7322.07 Total = Total A + Total B Add 5% contingencies... 366.10 TOTAL Rs. in lakhs 7688.17 Say Rs. in Lakhs 7688 Rupees Seventy Six Crore Eighty Eight Lakhs only/-

******


169


10

Financial Analysis

FFiinnaanncciiaall A Annaallyyssiiss

10.1 General This Detail Project Report on Phase-II & Phase-II (Part-I) envisages to meet requirements of un developed area of the Rajkot city. This would involve substantial capital outlays and operation and maintenance costs. AS part of JnNURM it is assumed that RMC has to make provision of 30% of capital expenditure while, 50% contribution will be shared by Govt of India and remaining 20% by the Govt of Gujarat. The total Operation and maintenance cost will be borne by Rajkot Municipal Corporation. Due to the constraints within the Corporation and heavy demands on the available funds from a variety of development, it is necessary that drainage service becomes self sustainable in its operation. A suitable drainage service tariff structure needs to be designed to meet the operation.

10.2 RMC Finance The Main components of Revenue Incomes of RMC are: •

Octroi (power to collect given by statute)

•

Property Tax (power to collect given by statute)

•

Revenue Grants (assistance from govt., other bodies)

•

Miscellaneous Incomes Rent Received (from lands, property etc., possessions)

•

Public Service Charges (for services provided),

•

Other Incomes

Octroi Collections :Octroi contributes the largest share (over 56% of the total revenue income) to the Revenue basket of RMC. Even a small percentage fall in Octroi Income could cause a bigger loss to RMC and as Octroi being the largest income source, there is a greater sensitivity to fluctuations from this source of income. Property Tax: Property tax (House tax, Conservancy tax, Fire tax and Education cess) is the second largest tax Revenue source and constitutes average 35-37% of the total revenue income and 25 percent of total income. The There are about 2, 08,000nos. Of built up properties are being assessed within Rajkot Municipal Corporation limits. The average growth rate of assess is about 2%. As per BPMC Act, 1949 Corporation can revise the ARV of properties once in four years however; last revision was made during year 1992. The corporation levies a tax on bases of built-up area measurement and thereby finding Annual Ratable Value (ARV) of the collection of tax. The current demand of house tax is Rs58.01 millions where as there are outstanding arrears as on 31-12-2005 is 1702 millions.

Detail Project Report for Drainage Phase-II & Phase-II (Part-I) for Rajkot City

170


Financial Analysis

Theatre Tax: RMC collects theatre tax from theatres as well as professional entertainment shows within RMC limits. It is very nominal tax of Rs.75.00 per cinema show... Average collection of theatre tax is Rs.11.00 Lakhs per annum. Vehicle Tax: From year 2002-03 RMC started to impose lifetime vehicle taxes. The tax structure depends on type of vehicles and age of vehicles. Up to 1/10/2005 RMC have collected Rs.30 Lakhs from about 60000 vehicles.

The mechanism of collecting vehicle tax for new vehicle is

comparatively easier as it is linked vehicle sellers. Water Charges: Another important source of income is Water Charges. RMC collects water charges as part of the property tax. Drainage Tax: From year 2003 RMC levied drainage tax on each property on the bases of 1% of ARV of property. Revenue Grants : (assistance from govt., other bodies)Revenue grants are one of the non-tax revenue sources of RMC. Revenue grants may be for general purpose or for any specific purpose. It constitutes the third largest source of Ram’s revenue income. Miscellaneous Incomes: Rent Received (from lands, property etc., possessions),Under this head rent received, public service charges, interest on funds invested, high school fees etc. are collected. Public Service Charges (for services provided): Another source, public service charges, includes incomes from ambulance rent, garden income, swimming pool fees etc. Share of income from this source is negligible, despite large sum invested by RMC for development and maintenance of public places.

Other Incomes Income from penalty, administrative charges etc. is considered as other Income. It largely depends upon the special charges or drives like administrative collection charges for SWM etc.; it ranges from Rs.150 Lakhs to Rs.300 Lakhs.

Year

2001/02 2002/03 2003/04 2004/05 2005/06

Table: Municipal Revenue Income Revenue Account Receipts ( Rs. Lakhs) Tax Non-Tax Transfers Total including grants 7892.71 921.43 483.25 9297.39 9784.55 1306.55 1222.14 12313.24 9391.98 1147.21 828.51 11367.7 11393.19 969.07 653.27 13013.85 11310.85 954.87 1319.64 13585.36

Revenue Expenditure The Corporation spends the resources for establishment, operation and maintenance and debt servicing of obligatory and discretionary services provided by it. The major heads of revenue expenditure include general administration, water works, drainage , conservancy, roads, streetlights, public health, education, garden , fire brigade etc.,


171


Financial Analysis

From above table, it reveals that every year, there is revenue surplus which is being diverted to development work.

Capital Work : For capital work, RMC used to raise the finance through Bank, debenture, bond etc. up to 60 to 65% of the project cost depending upon the magnitude of the work. The balance amount is being made available from revenue surplus as well as capital income by selling the land of Town Planning and Survey.

Management Process in RMC For economy in the expenditure RMC has taken several steps namely the new recruitment has been freeze since long. The O&M of almost all the services like water supply / drainage / solid waste / street light / parks and gardens / Aviary and Library / Planetarium and Crematorium etc is through privatization which has significant impact on economy. Also in telephone services, C.U.G. with TATA Indicom has been adopted and for vehicles the ceiling limit of monthly expenditure has been fixed for each officer. With this, the establishment expenditure of RMC remains within 28 to 29% of revenue expenditure.

10.3 Present Tariff, Billing and Collection Service Connection Rajkot Municipal Corporation started to levy Drainage Tax from year 2003. Initially, it was charged Rs.100/ connection/annum. As the amount was too low and very difficult to collect, RMC started to charge drainage tax at the rate of 1% of Annul Ratable Value of the property(ARV) or Rs.100 whichever is higher amount from each property, irrespective of the property having drainage connection. Again , RMC revised drainage tax from year 2006. Now it is at the rate of 2% of ARV or Rs.100 whichever is higher amount, from each property of the city. Level of subsidies Year Income from Drainage tax Expenditure Income v/s Exp. Level of subsidy Billing and Collection:

2005-06 (Rs.in lakhs) 228.89 393.04 58% 32%

The billing system is computerized and decentralized. The collection of water charges is at three different places viz., (i ) Main office building (ii) City Civic center, Amin Road (iii) City Civic Center – Krishnagar . Bills to all property holders are sent on yearly basis.


172


Financial Analysis

The responsibility of repair and maintenance lies with the consumers. As per BPMC Act, 1949, if the consumer does not pay the bill within 15 days of the date of issue, 18% interest is to be levied. A notice is to be issued for disconnection of water connection if the consumer does not pay after next 30 days of the date of issue of the bill.

Planning for Tariff Revision: From the year 2005-06, RMC has linked the Drainage charges with the ARV value of property tax which is 1% of ARV (Annual Rental Value) of the property. It is also proposed to increase the same by 100% i.e. 2% of ARV from the year 2006-07 as a part of urban reforms and as agreed in the JnNURM Urban Reforms Agenda which will yield about Rs.300 Lakhs per year . It is also proposed to increase the same by 15 % every year and it is assumed to make the service self sustainable before end of year 2010.

10.4 Drainage Projects & Project Funding The details of the JnNURM Drainage projects and their cost estimated have been presented in the chapter of cost of drainage projects. Year wise distribution of project cost is given in table The project is proposed to be funded through Government of India mega mission Jawaharlal Nehru National Urban Renewal Mission (JnNURM). As per the fund guidelines, Govt. of India will contribute 50% of project costs, while 20% of project cost will be contributed by Government of Gujarat. Thus total funding & yearwise allocation of fund will be as shown in following table : Total

2005-06

JnNURM GOI Fund (50%)

2006-

2007-

2008-

2009-

2010-

2011-

07

08

09

10

11

12

5854

642.5

1395

1269

600

497.5

700

750

2341.6

257

558

507.6

240

199

280

300

3512.4

385.5

837

761.4

360

298.5

420

450

11708

1285

2790

2538

1200

995

1400

1500

GOG contribution (20%) RMC'

Share

(30%) Total…

********


173


11

Summing Up

S Suum mm miinngg uupp....

12.1 Conclusion Safe water supply and hygienic sanitation facilities are the two basic essential amenities the community needs on a top priority for health living. The Sewerage services falls under essential service category and by the BPMC Act. Because of the merging of the new area, coverage of sewerage is about 65% (total of new + old area) too less in Rajkot.

Rajkot underground sewerage project costing Rs.40 crores covering area around 40 sq.km of walled city was implemented by Govt. of Gujarat with loan assistance from World Bank during the period 1984 to 1994 in which, following works were executed with the base year 1980-81. 1.

Collective system and house connections 885 kms

2.

Civil work of pumping station.. 7 nos. in city.

3.

Non-clog C.F.pumping sets .. 22 sets

4.

900 mm dia prestressed concrete rising main 3.5 km long.

5.

44.5 mld capacity sewage treatment plant at Madhapar.

The project was conceived with base year 1980-81 with covering area of old city 69 sq.km. but at that time the city was not fully developed and as such in stage-I the only developed area covering 40 sq.km was considered splitting the work of pumping machinery, sewage treatment plant and collective system.The project was prepared by Consultant M/s.Paramount Pollution Control Pvt.Ltd., Baroda. Subsequently, after implementation of the work of Phase-I, the development of the city was very fast and most of the earlier left out area has been developed fully and Rajkot Municipal Corporation has decided to implement underground sewerage system for all these developed area of walled city covering additional 20 sq.km wherein following works are proposed as a Phase-II (Part-I): o

Collective system and house connection 113 Kms.

o

Providing and fixing additional pumping machinery in the existing pump house total 9 sets.

o

Extension of existing plant by 44.5 mld 1 No.

As per original project report, twin pipeline each of 900 mm dia prestressed is to be laid from Popatpara main pumping station to Madhapar treatment plant as a rising main.

In view of above,

the estimated cost of Phase-II part-I covering about 20 sq.km of walled city has been worked out which is as under:


174


Sr No 1 2

3 4 5

Summing Up



Collective system and house connections 600 Installation of additional non-clog C.F. pumping 285 machinery in existing pump house - total no.of sets 9 a) Popatpara main pumping station 1200 cumt per hour against head of 42 mt 4 sets. b) Bedipara pumping station 480 cumt per hour against head of 23 mt 2 sets c) Bedinaka pumping station 950 cumt per hour 17 mt head 2 sets d) Housing Board pumping station 350 cumt per hour 13.5 mt head 1 set Extension of sewage treatment plant with extended 1120 aeration process with sludge digester 44.5 mld capacity. Additional power connection at Madhapar plant 30 Compound wall at Madhapar plant 15 Total 2050 Rupees Twenty Crore Fifty Lakhs Only/The work of collective system and house connections have already taken up in hand since

2000-01 covering 10 sq.km area. Collective system for remaining 10 sq.km area is yet to be taken up in hand for which the estimated cost would be around Rs.600 lacs. Rajkot is located on besalt. The excavation is the main problem and because of which the progress in the drainage system is not as per the requirement. For work of sewage treatment plant RMC has finalized the process design and tenders are to be invited shortly. On completion of the Phase-II work, the total coverage of walled city under Underground Sewerage System would be around 60 sq.km (40 Phase-I + 20 Phase-II). The remaining 9 sq.km area will be covered as when same gets developed. The works of Phasde-II part-II are proposed to be taken up in the year 2008-09. The detailed project report is yet to be prepared. In view of above, the present situation of walled city covering 69 sq.kms is as under: Sr No 1

2

3

Item World Bank assisted sewerage system commissioned in the year 1994-95 under Phase-I Implementation of underground sewerage system for the developed area under Phase-II part-I

Area in sq.km 40

20

Cost (Rs. in Remarks lakhs) 4000.00 Completed commissioned

and

2050.00 Project is prepared and work of collective system is in progress. ------ Project is yet to be conceived

Implementation of the 9 underground sewerage system for the area to be developed in future. The approval is needed under Jawaharlal Nehru National Urban Renewal Mission is for

Rs.2050 lakhs only for the work of Phase-II part-I.


175


Summing Up

The city limit was extended by the Govt. of Gujarat in June 1998 by adding 35.60 sq.km area in west direction of the walled city by merging outskirt 3 villages namely Mavdi, Nana Mava and Raiya. At the time of merger, the newly merged area was not having any infrastructure facility and thus RMC has taken up the works of implementation of all infrastructure projects viz; water supply, sanitation, roads, underground sewerage system, street light etc. on priority basis. so far, RMC has pumped about Rs.125 crore for development work in newly merged area. For above newly merged area, RMC had engaged consultant who has prepared a detailed project report of underground sewerage system covering 15 sq.km area at the first instant where development has taken place. The work is to be executed as a Phase-III Part-I. The remaining 20.6 km area the project is yet to be conceived as in this region, the development is very slow and likely to be saturated in the year 200809. At that time, the project will be conceived to cover under underground sewerage system. The estimated cost of the project for covering 15 sq.km area of newly merger works out as under: Sr No 1 2 3 4

Item (Stage-III Part-I)

Estimated cost in lacs

Collective system House connections Pumping Station Civil Works Pumping Station Rising Mains Works

1860.76 1404.59 293.06 139.60 5272.07

Total

As stated above the balance 20.6 sq.km (35.6 - 15) area is yet to be developed for which detailed project report will be prepared later on. Thus, the final situation of underground sewerage project for newly merged area is as under: Sr

Item

Area in sq.km

Amount in lacs

No 1

Detailed underground sewer-age system

15

Rs.5272.07 Lakhs

for merged area stage-III part-I with base year 2000-01 suggested under Jawaharlal Nehru National Urban Renewal Mission for the year 2005-06 and 2006-07. 2

Detailed underground drainage system

20.6

for the merged area stage-III part-II suggested

under

Jawaharlal

The DPR is yet to be prepared

Nehru

National Urban Renewal Mission for the year

2008-09. Project is yet to be

conceived.


176


Summing Up

In view of above, following detailed project reports are submitted for consideration under JNNURM for the year 2005-06 to 2007-08. Sr No 1 2 3 4 5

1 2 3 4 5 6



Phase-II (Part-I) Collective system and house connections 600 Installation of additional non-clog C.F. pumping 285 machinery in existing pump house Extension of sewage treatment plant with extended 1120 aeration process with sludge digester 44.5 mld capacity. Additional power connection at Madhapar plant 30 Compound wall at Madhapar plant 15 2050 Total…..A Phase-III (Part-I) Collective system 1860.76 House connections 1404.59 Pumping Station Civil Works 293.06 Pumping Station Rising Mains Works 139.60 Pumping Station Machinery Works 245.25 Sewage Treatment Plant 1328.81 Total…..B 5272.07 7322.07 Total = Total A + Total B Add 5% contingencies.. 366.10 TOTAL Rs. in lakhs 7688.17 Say Rs. in Lakhs 7688 Rupees Seventy Six Crore Eighty Eight Lakhs only/Thus, the submitted DPR for Rajkot Under ground Drainage Phase-II & Phase-III ( Part-I )

amounts Rupees Seventy Six Crore Eighty Eight Lakhs Only.

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177

Drainage_DPR.pdf

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