Improving & Revamping the Existing / Proposed Water Supply Distribution System With

Improving & Revamping the Existing / Proposed Water Supply Distribution System with Continuous Pressurized Supply to Coimbatore Corporation

MMaaiinn RReeppoorrtt && AAnnnneexxuurree Volume – I (a)

JUNE APRIL 2013 201 7 FICHTNER Consulting Engineers India Pvt. Ltd. Menon Eternity, 9th Floor, No, 165, St.Marys Road Alwarpet, Chennai - 600018 Tel : +91 – 044 – 45932600, Fax : + 91 – 044 - 45932809 Email : [email protected] Website : www.fichtner.co.in

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

List of Contents Chapters and Appendices

LIST OF ANNEXURES

LIST OF DRAWINGS v

LIST OF TABLES xv

LIST OF FIGURES xviii

PROJECT SUMMARY 21

1 Sector Background, Context & Broad Project Rationale 25 1.1 Project Site Appreciation 25 1.1.1 Physical & Geographical Characteristics 25 1.1.2 Topography 26 1.1.3 Geology 26 1.1.4 Soil 26 1.1.5 Structure & Tectonics 26 1.1.6 Weathering 26 1.1.7 Alluvium & Kankar 26 1.1.8 Climate and Rainfall 26 1.1.9 Industrial Activities 27 1.1.10 Existing Status of Physical Infrastructure 27 (i) Status of Water Supply Infrastructure 27 (ii) Source - Pillur (Bhavani River) source 28 (iii) Source - Siruvani River Source 30 (iv) Present Water Distribution Zones 30 (v) Master Service Reservoirs 31 (vi) Service Reservoirs 31 (vii) Existing Water Distribution System 34 1.1.11 Seismicity 40 1.1.12 Groundwater Quality and Quantity 41 1.1.13 Financial Status of the Local Body 41 1.1.14 Sewerage Infrastructure 41 1.1.15 Sewage Farms 42 1.1.16 Storm Water Drains 42 1.1.17 Solid Waste Management 43 1.1.18 E-Governance 43 1.1.19 Web site 43 1.2 Existing Tariff and Cost Recovery 44

2 Project Definition, Concept and Scope 45 2.1 Project Area 45

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2.2 Scope of Work 45 2.3 Objectives 45 2.3.1 Objective: A 45 2.3.2 Objective: B 46 2.4 Selection of Design Basis 47 2.4.1 Flow Reliability Analysis on Pillur Source 47 2.5 Deficiencies of the Existing Water Supply System 51 2.6 Project Benchmarks 52 2.7 Need for the Project 52 2.8 Technical Solutions towards Project Benchmarks 55 2.8.1 Methodology for 24 X 7 WSS 55 (i) Back drop drawing 55 (ii) Operational Zones 55 (iii) District Metering Areas 56 (iv) Hydraulic Model 56 (v) Simulation of DMAS 56 (vi) Bulk Water Meters and Consumer Water Meters 57 2.8.2 Instrumentation for 24 X 7 WSS 57 2.8.3 Disinfection Process for 24 X 7 WSS 61 2.8.4 24 X 7 Customer Care Centre 61 2.8.5 Introduction of Volumetric Rational Tariff 61 2.9 Physical Infrastructure Components 61 2.9.1 Formulation of Design Basis 61 (i) Design Parameters 61 (ii) Population Projection 62 (iii) CDP Observations for Demand Projection 63 (iv) Topographical Survey 81 (v) Soil Investigation 81 (vi) Zoning of Distribution System 84 (vii) Distribution System Network 84 (viii) Consumption Peak Factor 84 (ix) Minimum Residual Head 85 (x) Utility of Existing Pipes 85 (xi) Network Analysis for Looped Distribution System 85 (xii) Elimination of Public Fountains 86 (xiii) Pipe Material 86 (xiv) Trench Size for Pipe Laying 87 (xv) Service Reservoirs 87 (xvi) House Service Connections 87 2.9.2 Field Investigations Done 88 2.9.3 Detailed Engineering Design - Feeder Main System 92 (i) Existing Feeder Main System 93 (ii) Existing Problems in Feeder Main Systems 95

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(iii) Proposed Feeder Main System 96 (iv) Proposed Feeder Main Alignment 97 (v) Appurtenances Proposed 113 1. Sluice Valve 113 2. Scour Valve 113 3. Air Valve 113 4. Flow Regulating Valves 114 5. Bulk Water Meters and Data Loggers 114 (vi) Observations on Hydraulic Design of Feeder Mains 115 2.9.4 Interlinking of Pillur MSR and Siruvani MSR 117 (i) Appurtenances Proposed 118 1. Sluice Valve 118 1. Scour Valve 118 2. Air Valve 118 2.9.5 Detailed Engineerign Design – Distribution System 119 (i) Zoning of the Project Area 119 1. North Zone 119 2. West Zone 120 3. South Zone 120 4. East Zone or Demo Zone I & II 120 (ii) Rezoned Boundaries 121 (iii) Propsoed Pipe Materials & Sizes 121 (iv) Service Reservoirs 140 (v) Abandoned Sumps & SRs 157 (vi) Appurtenances Proposed 157 1. Sluice Valve 157 2. Scour Valve 158 3. Air Valve 158 4. Pressure Control Valves and Bulk Water Meter 158 2.9.6 Automation of Distribution System – SCADA 159 (i) Introduction 159 (ii) Scope of work 159 (iii) System Design 160 (iv) Proposed System 160 1. SRs / GLSRs in Distribution Network 160 2. Central SCADA Station at MSRs 161 2.9.7 Clearances Required From Other Agencies 162 2.10 Environmental Impact Assessment 162 2.10.1 Objective of EIA 162 2.10.2 Legal and Policy Framework 163 2.10.3 Environmental Assessment and Review Process 163 2.10.4 National Regulations 163 2.10.5 Necessity for this EIA Study 166 2.10.6 Broad Paradigms for Mitigation Plan 167 2.10.7 Resettlement and Rehabilitation Issues 168

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2.10.8 Management of Noise Impacts 168 2.10.9 Managing Impacts due to Construction Machinery 168 2.10.10 Managing Impact of Air Pollution 169 2.10.11 Environmental Monitoring 176 2.10.12 Impact during Design Phase 178 2.10.13 Impact during Construction Phase 179 2.10.14 Impact during Operation Phase 181 2.10.15 Impact Identification Matrix 181 2.10.16 Environmental and Social Classification 183 2.10.17 Specialized Services for PMC and Quality Assurance 183

3 Project Cost 184 3.1 Basis of Costing 184 3.2 Land acquisition / Site Development 184 3.3 Physical Infrastructure Component Cost 184 3.4 Rehabilitation & Resettlement Cost 187 3.5 Project Costing 187 3.6 Annual Operation and Maintenance Costs 187 3.7 Institutional Strengthening 189 3.7.1 Training to be imparted 189

4 Project Institution Framework 191 4.1 Roles of Different Institutions 191 4.2 Roles and Responsibility Matrix 192 4.2.1 Role of the Government of Tamilnadu (GoTN) 192 4.2.2 Role of the Coimbatore Water Supply Sector 192 4.2.3 Role of the Coimbatore City Corporation (CCC) 193 4.3 Overall Financial Structuring of the Project 193

5 Project O&M Planning 195 5.1 Institution Framework (Organization & Operations) Strategy 195 5.2 Selection of O&M Operator 195 5.2.1 Preventive Maintenance 195 5.2.2 Quality of Materials 197 5.2.3 Maintenance of Service Reservoirs 197 5.2.4 Maintenance of Water Distribution System 197 5.2.5 Duration and quantity of supply 198 5.2.6 Quality of water received by household 198

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

LIST OF DRAWINGS

S.NO DESCRIPTION DWG NO

1 Index & Key Plan 10/1811150/WSS/WIN/001 2 Contour Plan 10/1811150/WSS/WIN/002 3 Ward Plan 10/1811150/WSS/WIN/003 4 Existing water supply system 10/1811150/WSS/WIN/004 5 Existing Feeder Main System 10/1811150/WSS/WIN/005 6 Existing Distribution System 10/1811150/WSS/WIN/006 Feeder Main Drawings Proposed Feeder Main System - Pillur, Siruvani & 7 10/1811150/WSS/WIN/007 MSR Interlinking Plan showing Pillur MSR Outlet Interconnections 8 & MSR SR interconnections at Bharathi Park & 10/1811150/WSS/WIN/008 Ramakrishnapuram Plan Showing the Alignment of Pillur Feeder Main 9 - I (From Proposed MSR at Ramakrishnapuram to 10/1811150/WSS/WIN/009 Proposed SR at Bharathi Nagar - By Gravity) 10/1811150/WSS/WIN/010 10 Flow Diagram for Pillur Feeder Main - I (sheet 1 to 2) Longitudinal Section for Pillur Feeder Main - I & 10/1811150/WSS/WIN/011 11 Branches (sheet 1 to 8) Plan Showing the Alignment of Pillur Feeder Main - II (From Existing MSR at Ramakrishnapuram to 12 10/1811150/WSS/WIN/012 Proposed SR at Lakshmi Nagar Mill Colony - By Gravity) 10/1811150/WSS/WIN/013 13 Flow Diagram for Pillur Feeder Main - II (sheet 1 to 2) Longitudinal Section for Pillur Feeder Main - II & 10/1811150/WSS/WIN/014 14 Branches (sheet 1 to 6) Plan Showing the Alignment of Pillur Feeder Main 15 - III (From Existing MSR at Ramakrishnapuram to 10/1811150/WSS/WIN/015 Proposed Sump at Rakatchi Garden - By Gravity) 16 Flow Diagram for Pillur Feeder Main - III 10/1811150/WSS/WIN/016 Longitudinal Section for Pillur Feeder Main - III & 17 10/1811150/WSS/WIN/017 Branches Plan Showing the Alignment of Pillur Feeder Main 18 - IV (From Proposed Sump at Rakatchi Garden to 10/1811150/WSS/WIN/018 Proposed SR at Jai Nagar - By Pumping ) 19 Flow Diagram for Pillur Feeder Main - IV 10/1811150/WSS/WIN/019

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

Longitudinal Section for Pillur Feeder Main - IV & 10/1811150/WSS/WIN/020 20 Branches (sheet 1 to 4) Plan Showing the Alignment of Siruvani Feeder 21 Main - I (From Existing MSR at Bharathi Park to 10/1811150/WSS/WIN/021 Proposed SR at Housing Unit - By Gravity) 10/1811150/WSS/WIN/022 22 Flow Diagram for Siruvani Feeder Main - I (sheet 1 to 2) Longitudinal Section for Siruvani Feeder Main - I 10/1811150/WSS/WIN/023 23 & Branches (sheet 1 to 4) Plan Showing the Alignment of Siruvani Feeder Main - II (From Existing MSR at Bharathi Park to 24 10/1811150/WSS/WIN/024 Proposed Sump at Sanganur Chinthamani - By Gravity) 25 Flow Diagram for Siruvani Feeder Main - II 10/1811150/WSS/WIN/025 Longitudinal Section for Siruvani Feeder Main - II 26 10/1811150/WSS/WIN/026 & Branches Plan Showing the Alignment of Siruvani Feeder Main - III (From Proposed Sump at Sanganur 27 10/1811150/WSS/WIN/027 Chinthamani to Revathy Layout SR & Direct Feeding SR's - By Pumping) 28 Flow Diagram for Siruvani Feeder Main - III 10/1811150/WSS/WIN/028 Longitudinal Section for Siruvani Feeder Main - III 10/1811150/WSS/WIN/029 29 & Branches (sheet 1 to 2) Plan Showing the Alignment of Pillur Siruvani MSR Interlinking Main (From Existing MSR at 30 10/1811150/WSS/WIN/030 Ramakrishnapuram to Proposed GLSR at Bharathi Park - By Gravity) 31 Flow Diagram for MSR Interlinking Feeder Main 10/1811150/WSS/WIN/031 10/1811150/WSS/WIN/032 32 Longitudinal Section for MSR Interlinking Main (sheet 1 to 2) Distribution System Drawings Proposed Zonal Boundaries for Distribution 33 10/1811150/WSS/WIN/033 System Plan Showing the Boundary of North Zone - 34 10/1811150/WSS/WIN/034 Distribution System WS Distribution System Layout Plan - North Zone 35 10/1811150/WSS/WIN/035 - Avarampalayam SR (Existing) WS Distribution System Layout Plan - North Zone 36 10/1811150/WSS/WIN/036 - PRP Garden SR (Proposed) WS Distribution System Layout Plan - North Zone 37 10/1811150/WSS/WIN/037 - Jai Nagar SR - Zone A (Proposed)

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

WS Distribution System Layout Plan - North Zone 38 10/1811150/WSS/WIN/038 - Jai Nagar SR - Zone B (Proposed) WS Distribution System Layout Plan - North Zone 39 10/1811150/WSS/WIN/039 - Kamadhenu Nagar SR (Existing) WS Distribution System Layout Plan - North Zone 40 10/1811150/WSS/WIN/040 - Kamarajapuram SR (Existing) WS Distribution System Layout Plan - North Zone 41 10/1811150/WSS/WIN/041 - Karupayya Gounder SR - Zone A (Proposed) WS Distribution System Layout Plan - North Zone 42 10/1811150/WSS/WIN/042 - Karupayya Gounder SR - Zone B (Proposed) WS Distribution System Layout Plan - North Zone 43 10/1811150/WSS/WIN/043 - Nehru Street SR - Zone A (Proposed) WS Distribution System Layout Plan - North Zone 44 10/1811150/WSS/WIN/044 - Nehru Street SR - Zone B (Proposed) WS Distribution System Layout Plan - North Zone 45 10/1811150/WSS/WIN/045 - Peelamedu SR - Zone A (Existing) WS Distribution System Layout Plan - North Zone 46 10/1811150/WSS/WIN/046 - Peelamedu SR - Zone B (Existing) WS Distribution System Layout Plan - North Zone 47 10/1811150/WSS/WIN/047 - Ponni Nagar SR - Zone A (Proposed) WS Distribution System Layout Plan - North Zone 48 10/1811150/WSS/WIN/048 - Ponni Nagar SR - Zone B (Proposed) WS Distribution System Layout Plan - North Zone 49 10/1811150/WSS/WIN/049 - Gandhi Ma Nagar SR (Existing) WS Distribution System Layout Plan - North Zone 50 10/1811150/WSS/WIN/050 - Rakatchi Garden SR - Zone A (Proposed) WS Distribution System Layout Plan - North Zone 51 10/1811150/WSS/WIN/051 - Rakatchi Garden SR - Zone B (Proposed) WS Distribution System Layout Plan - North Zone 10/1811150/WSS/WIN/052 52 - Ramakrishnapuram SR - Zone A (Proposed) (sheet 1 to 2) WS Distribution System Layout Plan - North Zone 53 10/1811150/WSS/WIN/053 - Ramakrishnapuram SR - Zone B (Proposed) WS Distribution System Layout Plan - North Zone 54 10/1811150/WSS/WIN/054 - Rathinapuri SR (Existing) WS Distribution System Layout Plan - North Zone 55 10/1811150/WSS/WIN/055 - Rayyapa Nagar SR - Zone A (Existing) WS Distribution System Layout Plan - North Zone 56 10/1811150/WSS/WIN/056 - Rayyapa Nagar SR - Zone B (Existing) WS Distribution System Layout Plan - North Zone 57 10/1811150/WSS/WIN/057 - RG Nagar SR (Existing)

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

WS Distribution System Layout Plan - North Zone 58 10/1811150/WSS/WIN/058 - Sanganur Road SR - Zone A (Proposed) WS Distribution System Layout Plan - North Zone 59 10/1811150/WSS/WIN/059 - Sanganur Road SR - Zone B (Proposed) WS Distribution System Layout Plan - North Zone 10/1811150/WSS/WIN/060 60 - VKR Nagar SR - Zone A (Proposed) (sheet 1 to 2) WS Distribution System Layout Plan - North Zone 61 10/1811150/WSS/WIN/061 - VKR Nagar SR - Zone B (Proposed) Plan Showing the Boundary of South Zone - 62 10/1811150/WSS/WIN/062 Distribution System WS Distribution System Layout Plan - South Zone 63 10/1811150/WSS/WIN/063 - BSUP Layout SR (Proposed) WS Distribution System Layout Plan - South Zone 64 10/1811150/WSS/WIN/064 - Clock Tower SR (Existing) WS Distribution System Layout Plan - South Zone 65 10/1811150/WSS/WIN/065 - JK Garden SR (Proposed) WS Distribution System Layout Plan - South Zone 66 - Lakshmi Nagar Mill Colony SR - Zone A 10/1811150/WSS/WIN/066 (Proposed) WS Distribution System Layout Plan - South Zone 67 - Lakshmi Nagar Mill Colony SR - Zone B 10/1811150/WSS/WIN/067 (Proposed) WS Distribution System Layout Plan - South Zone 68 10/1811150/WSS/WIN/068 - Puliyakulam SR - Zone A (Existing) WS Distribution System Layout Plan - South Zone 69 10/1811150/WSS/WIN/069 - Puliyakulam SR - Zone B (Existing) WS Distribution System Layout Plan - South Zone 10/1811150/WSS/WIN/070 70 - Singanallur SR (Existing) (sheet 1 to 2) WS Distribution System Layout Plan - South Zone 10/1811150/WSS/WIN/071 71 - Sivaram Nagar SR (Proposed) (sheet 1 to 2) WS Distribution System Layout Plan - South Zone 72 10/1811150/WSS/WIN/072 - Thiru Nagar SR - Zone A (Proposed) WS Distribution System Layout Plan - South Zone 73 10/1811150/WSS/WIN/073 - Thiru Nagar SR - Zone B (Proposed) WS Distribution System Layout Plan - South Zone 74 10/1811150/WSS/WIN/074 - Town Hall SR - Zone A (Existing) WS Distribution System Layout Plan - South Zone 75 10/1811150/WSS/WIN/075 - Town Hall SR - Zone B (Existing) WS Distribution System Layout Plan - South Zone 10/1811150/WSS/WIN/076 76 - Valliammal Street SR (Proposed) (sheet 1 to 2)

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

WS Distribution System Layout Plan - South Zone 77 10/1811150/WSS/WIN/077 - Vysial Street SR (Proposed) Plan Showing the Boundary of East / Demo 78 10/1811150/WSS/WIN/078 Zone - I - Distribution System WS Distribution System Layout Plan - East / Demo 79 10/1811150/WSS/WIN/079 Zone I - Siddhaphudhur SR - Zone A (Existing) WS Distribution System Layout Plan - East / Demo 80 10/1811150/WSS/WIN/080 Zone I - Siddhaphudhur SR - Zone B (Existing) WS Distribution System Layout Plan - East / Demo 81 10/1811150/WSS/WIN/081 Zone I - Tatabad SR - Zone A (Existing) WS Distribution System Layout Plan - East / Demo 82 10/1811150/WSS/WIN/082 Zone I - Tatabad SR - Zone B (Existing) WS Distribution System Layout Plan - East / Demo 83 10/1811150/WSS/WIN/083 Zone I - VOC Park SR - Zone A (Existing) WS Distribution System Layout Plan - East / Demo 10/1811150/WSS/WIN/084 84 Zone I - VOC Park SR - Zone B (Existing) (sheet 1 to 2) WS Distribution System Layout Plan - East / Demo 85 10/1811150/WSS/WIN/085 Zone I - VOC Park SR - Zone A (Proposed) WS Distribution System Layout Plan - East / Demo 86 10/1811150/WSS/WIN/086 Zone I - VOC Park SR - Zone B (Proposed) Plan Showing the Boundary of East / Demo 87 10/1811150/WSS/WIN/087 Zone - II - Distribution System WS Distribution System Layout Plan - East / Demo 88 10/1811150/WSS/WIN/088 Zone II - Anna Nagar SR - Zone A (Existing) WS Distribution System Layout Plan - East / Demo 89 10/1811150/WSS/WIN/089 Zone II - Anna Nagar SR - Zone B (Existing) WS Distribution System Layout Plan - East / Demo 90 Zone II - Annai Velankanni Nagar SR - Zone A 10/1811150/WSS/WIN/090 (Proposed) WS Distribution System Layout Plan - East / Demo 91 Zone II - Annai Velankanni Nagar SR - Zone B 10/1811150/WSS/WIN/091 (Proposed) WS Distribution System Layout Plan - East / Demo 10/1811150/WSS/WIN/092 92 Zone II - Bharathi Nagar SR - Zone A (Proposed) Sheet 1 to 2 WS Distribution System Layout Plan - East / Demo 93 10/1811150/WSS/WIN/093 Zone II - Bharathi Nagar SR - Zone B (Proposed) WS Distribution System Layout Plan - East / Demo 94 10/1811150/WSS/WIN/094 Zone II - DJ Nagar SR - Zone A (Existing) WS Distribution System Layout Plan - East / Demo 95 10/1811150/WSS/WIN/095 Zone II - DJ Nagar SR - Zone B (Existing)

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

WS Distribution System Layout Plan - East / Demo 96 10/1811150/WSS/WIN/096 Zone II - GV Residency SR (Existing) WS Distribution System Layout Plan - East / Demo 97 10/1811150/WSS/WIN/097 Zone II - Hudco Colony SR (Proposed) WS Distribution System Layout Plan - East / Demo 98 10/1811150/WSS/WIN/098 Zone II - KK Nagar SR - Zone A (Existing) WS Distribution System Layout Plan - East / Demo 99 10/1811150/WSS/WIN/099 Zone II - KK Nagar SR - Zone B (Existing) WS Distribution System Layout Plan - East / Demo 100 10/1811150/WSS/WIN/100 Zone II - Kothari Nagar SR (Proposed) WS Distribution System Layout Plan - East / Demo 101 10/1811150/WSS/WIN/101 Zone II - Nethajipuram SR - Zone A (Existing) WS Distribution System Layout Plan - East / Demo 102 10/1811150/WSS/WIN/102 Zone II - Nethajipuram SR - Zone B (Existing) WS Distribution System Layout Plan - East / Demo 103 Zone II - Rajalakshmi Nagar SR - Zone A 10/1811150/WSS/WIN/103 (Proposed) WS Distribution System Layout Plan - East / Demo 104 Zone II - Rajalakshmi Nagar SR - Zone B 10/1811150/WSS/WIN/104 (Proposed) WS Distribution System Layout Plan - East / Demo 105 10/1811150/WSS/WIN/105 Zone II - SIHS Colony SR (Existing) WS Distribution System Layout Plan - East / Demo 106 Zone II - Sri Lakshmi Nagar SR - Zone A 10/1811150/WSS/WIN/106 (Proposed) WS Distribution System Layout Plan - East / Demo 107 Zone II - Sri Lakshmi Nagar SR - Zone B 10/1811150/WSS/WIN/107 (Proposed) WS Distribution System Layout Plan - East / Demo 108 10/1811150/WSS/WIN/108 Zone II - Tagore Nagar SR - Zone A (Proposed) WS Distribution System Layout Plan - East / Demo 109 10/1811150/WSS/WIN/109 Zone II - Tagore Nagar SR - Zone B (Proposed) WS Distribution System Layout Plan - East / Demo 110 10/1811150/WSS/WIN/110 Zone II - Uppilipalayam SR (Proposed) Plan Showing the Boundary of West Zone - 111 10/1811150/WSS/WIN/111 Distribution System WS Distribution System Layout Plan - West Zone - 112 10/1811150/WSS/WIN/112 AKS Nagar SR - Zone A (Proposed) WS Distribution System Layout Plan - West Zone - 113 10/1811150/WSS/WIN/113 AKS Nagar SR - Zone B (Proposed)

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

WS Distribution System Layout Plan - West Zone - 114 10/1811150/WSS/WIN/114 AKS Nagar SR - Zone C (Proposed) WS Distribution System Layout Plan - West Zone - 115 10/1811150/WSS/WIN/115 Bharathi Park SR - Zone A (Proposed) WS Distribution System Layout Plan - West Zone - 116 10/1811150/WSS/WIN/116 Bharathi Park SR - Zone B (Proposed) WS Distribution System Layout Plan - West Zone - 117 10/1811150/WSS/WIN/117 Boopathy Layout SR - Zone A (Existing) WS Distribution System Layout Plan - West Zone - 118 10/1811150/WSS/WIN/118 Boopathy Layout SR - Zone B (Existing) WS Distribution System Layout Plan - West Zone - 119 10/1811150/WSS/WIN/119 Cheran Nagar SR (Existing) WS Distribution System Layout Plan - West Zone - 120 10/1811150/WSS/WIN/120 Chinthamani Nagar SR - Zone A (Proposed) WS Distribution System Layout Plan - West Zone - 121 10/1811150/WSS/WIN/121 Chinthamani Nagar SR - Zone B (Proposed) WS Distribution System Layout Plan - West Zone - 122 10/1811150/WSS/WIN/122 DB Road SR - Zone A (Existing) WS Distribution System Layout Plan - West Zone - 123 10/1811150/WSS/WIN/123 DB Road SR - Zone B (Existing) WS Distribution System Layout Plan - West Zone - 124 10/1811150/WSS/WIN/124 Gandhi Park SR (Existing) WS Distribution System Layout Plan - West Zone - 125 10/1811150/WSS/WIN/125 Housing Unit SR - Zone A (Proposed) WS Distribution System Layout Plan - West Zone - 10/1811150/WSS/WIN/126 126 Housing Unit SR - Zone B (Proposed) (sheet 1 to 2) WS Distribution System Layout Plan - West Zone - 127 10/1811150/WSS/WIN/127 Iswarya Nagar SR - Zone A (Existing) WS Distribution System Layout Plan - West Zone - 128 10/1811150/WSS/WIN/128 Iswarya Nagar SR - Zone B (Existing) WS Distribution System Layout Plan - West Zone - 129 10/1811150/WSS/WIN/129 Jayaram Nagar SR - Zone A (Existing) WS Distribution System Layout Plan - West Zone - 130 10/1811150/WSS/WIN/130 Jayaram Nagar SR - Zone B (Existing) WS Distribution System Layout Plan - West Zone - 131 10/1811150/WSS/WIN/131 Koilmedu SR (Existing) WS Distribution System Layout Plan - West Zone - 132 10/1811150/WSS/WIN/132 Kurunji Garden SR - Zone A (Proposed) WS Distribution System Layout Plan - West Zone - 10/1811150/WSS/WIN/133 133 Kurunji Garden SR - Zone B (Proposed) (sheet 1 to 2) 134 WS Distribution System Layout Plan - West Zone - 10/1811150/WSS/WIN/134

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

Madathur SR (Existing) WS Distribution System Layout Plan - West Zone - 135 10/1811150/WSS/WIN/135 RS Puram SR - Zone A (Existing) WS Distribution System Layout Plan - West Zone - 10/1811150/WSS/WIN/136 136 RS Puram SR - Zone B (Existing) (sheet 1 to 2) WS Distribution System Layout Plan - West Zone - 137 10/1811150/WSS/WIN/137 Revathy Layout SR (Existing) WS Distribution System Layout Plan - West Zone - 138 10/1811150/WSS/WIN/138 Sanganur Chinthamani SR (Existing) WS Distribution System Layout Plan - West Zone - 139 10/1811150/WSS/WIN/139 Venkatapuram SR (Existing) Standard Drawings 140 Typical Details of Pitless, Glandless Sluice Valves 10/1811150/WSS/WIN/140 141 Typical Details of Pitless, Glandless Scour Valves 10/1811150/WSS/WIN/141 Typical Details of Single Cylindrical Type - 142 10/1811150/WSS/WIN/142 Duojet Air Valves Typical Details of Flow Control Valves with 143 10/1811150/WSS/WIN/143 Strainer Arrangement Typical Details of Pressure Control Valves with 144 Bulk Water Meter and Data Logger for Flow & 10/1811150/WSS/WIN/144 Pressure Measurement Typical Details of House Service Connection with 145 10/1811150/WSS/WIN/145 the Existing System Typical Details of House Service Connection 146 10/1811150/WSS/WIN/146 without the Existing System GA Drawings General Arrangement Drawing of SR - 4 LL - 15m 147 10/1811150/WSS/WIN/147 Staging Height General Arrangement Drawing of SR - 7 LL - 12m 10/1811150/WSS/WIN/148 148 Staging Height (sheet 1 to 2) General Arrangement Drawing of SR - 7 LL - 15m 10/1811150/WSS/WIN/149 149 Staging Height (sheet 1 to 2) General Arrangement Drawing of SR - 9 LL - 12m 10/1811150/WSS/WIN/150 150 Staging Height (sheet 1 to 2) General Arrangement Drawing of SR - 9 LL - 15m 10/1811150/WSS/WIN/151 151 Staging Height (sheet 1 to 2) General Arrangement Drawing of SR - 10 LL - 10/1811150/WSS/WIN/152 152 15m Staging Height (sheet 1 to 2) General Arrangement Drawing of SR - 11 LL - 10/1811150/WSS/WIN/153 153 15m Staging Height (sheet 1 to 2)

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

General Arrangement Drawing of SR - 12 LL - 154 10/1811150/WSS/WIN/154 15m Staging Height General Arrangement Drawing of SR - 13 LL - 155 10/1811150/WSS/WIN/155 15m Staging Height General Arrangement Drawing of SR -16 LL - 15m 156 10/1811150/WSS/WIN/156 Staging Height General Arrangement Drawing of SR -18 LL - 12m 157 10/1811150/WSS/WIN/157 Staging Height General Arrangement Drawing of SR - 18 LL - 158 10/1811150/WSS/WIN/158 15m Staging Height General Arrangement Drawing of SR - 19 LL - 159 10/1811150/WSS/WIN/159 15m Staging Height General Arrangement Drawing of SR - 20 LL - 160 10/1811150/WSS/WIN/160 12m Staging Height General Arrangement Drawing of SR - 20 LL - 161 10/1811150/WSS/WIN/161 15m Staging Height 162 General Arrangement Drawing of Sump - 7 LL 10/1811150/WSS/WIN/162 General Arrangement Drawing of Sump -10 LL 163 10/1811150/WSS/WIN/163 (Type 1 to Type 2)-(2 sheets) General Arrangement Drawing of Pump Room 164 10/1811150/WSS/WIN/164 (8M x 8m x 5M)-(2 sheets) General Arrangement Drawing of Pump Room 165 10/1811150/WSS/WIN/165 (20M x 20M x 6M) RCC Drawings Reinforcement Details of SR - 4 LL - 15m Staging 10/1811150/WSS/WIN/166 166 Height - Type Design (sheet 1 to 5) Reinforcement Details of SR - 7 LL - 12m Staging 10/1811150/WSS/WIN/167 167 Height - Type Design (sheet 1 to 5) Reinforcement Details of SR - 7 LL - 15m Staging 10/1811150/WSS/WIN/168 168 Height - Type Design (sheet 1 to 6) Reinforcement Details of SR - 9 LL - 12m Staging 10/1811150/WSS/WIN/169 169 Height - Type Design (sheet 1 to 6) Reinforcement Details of SR - 9 LL - 15m Staging 10/1811150/WSS/WIN/170 170 Height - Type Design (sheet 1 to 6) Reinforcement Details of SR - 10 LL - 15m 10/1811150/WSS/WIN/171 171 Staging Height - Type Design (sheet 1 to 6) Reinforcement Details of SR - 11 LL - 15m 10/1811150/WSS/WIN/172 172 Staging Height - Type Design (sheet 1 to 8) Reinforcement Details of SR - 12 LL - 15m 10/1811150/WSS/WIN/173 173 Staging Height - Type Design (sheet 1 to 7)

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.NO DESCRIPTION DWG NO

Reinforcement Details of SR - 13 LL - 15m 10/1811150/WSS/WIN/174 174 Staging Height - Type Design (sheet 1 to 7) Reinforcement Details of SR - 16 LL - 15m 10/1811150/WSS/WIN/175 175 Staging Height - Type Design (sheet 1 to 8) Reinforcement Details of SR - 18 LL - 12m 10/1811150/WSS/WIN/176 176 Staging Height - Type Design (sheet 1 to 8) Reinforcement Details of SR - 18 LL - 15m 10/1811150/WSS/WIN/177 177 Staging Height - Type Design (sheet 1 to 8) Reinforcement Details of SR - 19 LL - 15m 10/1811150/WSS/WIN/178 178 Staging Height - Type Design (sheet 1 to 8) Reinforcement Details of SR - 20 LL - 12m 10/1811150/WSS/WIN/179 179 Staging Height - Type Design (sheet 1 to 8) Reinforcement Details of SR - 20 LL - 15m 10/1811150/WSS/WIN/180 180 Staging Height - Type Design (sheet 1 to 8) Reinforcement Details of Sump - 7 LL - Type 10/1811150/WSS/WIN/181 181 Design (sheet 1 to 2) Reinforcement Details of Sump - 10 LL - Type 182 10/1811150/WSS/WIN/182 Design Reinforcement Details of Pump Room - 8m x 8m x 183 10/1811150/WSS/WIN/183 5m - Type Design Reinforcement Details of Pump Room - 20m x 184 10/1811150/WSS/WIN/184 10m x 6m - Type Design

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

LIST OF TABLES

Table No. 1 – Population Projection (Geometric Incremental Method) 23

Table No. 2 - Details of Water Demand for Intermediate Stage (2029) 24

Table No. 3 - Details of Water Demand for Ultimate Stage (2044) 24

Table No. 1.1 - Details of Water Supply Zones 31

Table No. 1.2 - Details of Service Reservoirs & Sumps 31

Table No. 1.3 – Existing Water Supply Scenario 34

Table No. 1.4 - Length of PVC Pipes in Existing System 37

Table No. 1.5 - Length of CI Pipes in the Existing System 37

Table No. 1.6 - Length of AC Pipes in the Existing System 38

Table No. 1.7 - Length of PSC Pipes in the Existing System 38

Table No. 1.8 - Abstract on Length of Existing Pipes in Distribution System 39

Table No. 1.9 - Quantity of TDS level measured in Ground water 41

Table No. 1.10 - Overall DCB Statement for CCC for the Past 5 years 41

Table No. 1.11 - Details of Existing Sewerage Service & Connection Charges 42

Table No. 1.12 - Existing water tariff 44

Table No. 2.1 - Inflow into Pillur Dam Reservoir (1966 – 2008) 48

Table No. 2.2 - Pillur Dam Source Realiability Analysis 49

Table No. 2.3 - Project Benchmarks 52

Table No. 2.4 – Hydraulic Design Parameters 62

Table No. 2.5 - Projected Population under Geometric Incremental Method 63

Table No. 2.6 – Ward Wise Population Density 64

Table No. 2.7 - Summary of Density Pattern 66

Table No. 2.8 – Population Projection Factor 66

Table No. 2.9 - Ward Wise Population Projection 68

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.10 - Ward Wise Demand Calculation 77

Table No. 2.11 – SBC Test on Proposed SR Site (One SR / Zone) 81

Table No. 2.12 – Soil Trial Pit at Thanner Pandal Road 82

Table No. 2.13 – Soil Trial Pit at Nava India Road 82

Table No. 2.14 – Soil Trial Pit at Avarampalayam 83

Table No. 2.15 – Number of House Service Connections (Base Year 2014) 88

Table No. 2.16 - Additional Data Collection Made 88

Table No. 2.17 - Water Sampling and Testing 89

Table No. 2.18 - Water Sampling and Testing 90

Table No. 2.19 - “C” Value used for Hydraulic Design 92

Table No. 2.20 - Pipe Sizes Proposed in Feeder Mains 92

Table No. 2.21 – Existing Feeder Mains under Pillur System 93

Table No. 2.22 – Existing Feeder Mains under Siruvani System 94

Table No. 2.23 - Pillur Feeder Main I 98

Table No. 2.24 - Pillur Feeder Main II 102

Table No. 2.25 - Pillur Feeder Main III 105

Table No. 2.26 - Pillur Feeder Main IV 106

Table No. 2.27 Siruvani Feeder Main I 107

Table No. 2.28 -Siruvani Feeder Main II 108

Table No. 2.29 - Siruvani Feeder Main - III 109

Table No. 2.30 - SRs by Direct Feeding before Siruvani MSR 111

Table No. 2.31 - Summary of flow in Feeder Mains 112

Table No. 2.32 - Sluice Valves in Feeder Main 113

Table No. 2.33 - Scour Valves in Feeder Mains 113

Table No. 2.34 - Air Valves in Feeder Mains 113

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.35 – Flow Regulating Valves for Pillur System 114

Table No. 2.36 - Pumpset Duty (of Each Pumps) for Pillur and Siruvani System 116

Table No. 2.37 - Gravity Interlinking between Pillur MSR & Bharathi Park GLSR 118

Table No. 2.38 - Pumping from Bharathi Park GLSR to Bharathi Park MSR 118

Table No. 2.39 - Sluice Valves in Feeder Main 118

Table No. 2.40 - Scour Valves in Feeder Main 118

Table No. 2.41 - Air Valves in Feeder Main 119

Table No. 2.42 - Pipe Sizes Proposed in Distribution System 121

Table No. 2.43 – Proposed HDPE Pipe Sizes in Distribution System 122

Table No. 2.44 – Proposed DI K7 Pipe Sizes in Distribution System 127

Table No. 2.45 – Retained CI Pipes suitable for Hydraulic Design in Distribution System 132

Table No. 2.46 – Total Pipe Length in Distribution System (Including retained pipe) 135

Table No. 2.47 – Details of Service Reservoirs 140

Table No. 2.48 – Details of SR & Distribution System Demand 144

Table No. 2.49 – Proposed Distribution System Demand or Rezoned Demand 148

Table No. 2.50 – Details of SR with Ward Numbers Covered 149

Table No. 2.51 – Proposed Service Reservoir Capacity 152

Table No. 2.52 – Details of SR with Reserved Site 152

Table No. 2.53 - Details of the Old and Abandoned SRs 157

Table No. 2.54 - Sluice Valves in Distribution System 157

Table No. 2.55 - Scour Valves in Distribution System 158

Table No. 2.56 - AirValves in Distribution System 158

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

LIST OF FIGURES

Fig. No. 1 - Siruvani Dam – Downstream View 27

Fig. No. 2 - Pillur Dam – Downstream View 28

Fig. No. 3 - Pillur Dam 28

Fig. No. 4 - Raw Water Intake Well at Pillur Reservoir 29

Fig. No. 5 - Gandhi Park SR 30

Fig. No. 6 - Ramakrishnapuram MSR 31

Fig. No. 7 - Siruvani Dam 47

Fig. No. 8 - Pillur Dam 47

Fig. No. 10 - Walk by Meter Reading 61

Fig. No. 9 - Mobile Meter Reader 60

Fig. No. 11 - Density Pattern of Wards in Coimbatore 67

Fig. No. 12 - Ward Wise Population Projection (From 1 to 20 - Old Ward Numbers) 73

Fig. No. 13 - Ward Wise Population Projection (From 21 to 40 – Old Ward Numbers) 74

Fig. No. 14- Ward Wise Population Projection (From 41 to 60 – Old Ward Numbers) 75

Fig. No. 15 - Ward Wise Population Projection (From 61 to 72 – Old Ward Numbers) 76

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

List of Abbreviation and Acronyms

BIS Bureau of Indian Standards

BLT Build Lease and Transfer

BOLT Build Operate Lease and Transfer

BOO Build Own and Operate

CCC Coimbatote City Corporation

CDP Comprehensive Development Plan

CI Cast Iron

CPHEEO Central Public Health & Environmental Engineering Organisation

CSMC Central Sanctioning and Monitoring Committee

Cu m Cubic Metre

DBFO Design Build Finance and Operate

DI Ductile Iron

DPR Detailed Project Report

EIRR Economic Internal Rate of Return

SR Service Reservoir

EOI Expression of Interest

EPC Engineering Procurement and Construction

GIS Geographical Information System

GLSR Ground Level Service Reservoir

GO Government Order

GPS Geographical Positioning System

GTS Great Trigonometric Survey

HDPE High Density Poly Ethylene

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

List of Abbreviation and Acronyms

HSC House Service Connection

HT High Tension

IRR Internal Rate of Return

JNNURM Jawarharlal Nehru National Urban Renewal Mission

KL Kilo litre (1000 litre)

lpcd Litres Per Capita Per Day

LT Low Tension

M&E Monitoring and Evaluation

ML Million Litre

MLD Million Litre per Day

MSL Mean Sea Level

O&M Operation and Maintenance

PF Public Fountain

PPP Public Private Partnership

PVC Poly Vinyl Chloride

RFP Request For Proposal

RFQ Request for Qualification

SOR Schedule of Rates

TOR Terms Of Reference

UFW Unaccounted for Water

ULB Urban Local Body

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

PROJECT SUMMARY

Preamble As a part of the Jawaharlal Nehru National Urban Renewal Mission (JNNURM) initiated by Government of India, Ministry of Urban Development and Ministry of Housing and Urban Poverty Alleviation, 63 cities have been selected all over India. The aim of the mission is to encourage various cities to initiate steps to bring about improvement in the existing service levels in an efficient, equitable and financially sustainable manner. Water Supply has been identified as one of the major sector eligible for assistance under the submission directorate for Basic Services to the Urban Poor. Coimbatore is one of the selected cities under this mission.

Background

Coimbatore City Corporation is located in the western part of Tamilnadu and is the third largest city in Tamilnadu after Chennai and Madurai and one of the fastest growing cities in India. This city serves as the District Headquarters for Coimbatore District and is situated at 495 kms South West of Chennai City in Tamilnadu. It is well connected with major cities and towns of India by Highways, Railways and Airways and also abroad. Coimbatore City is a major industrial and textile centre and is now emerging as a major hub for Information Technology in Tamilnadu. Many National and Multinational companies are planning to start their software parks in Coimbatore. Thereby, job opportunities and population are expected to increase in multifold. There are more than one lakh small, medium and large scale industries of Textile, Automobile spares, Foundry, Pumps, Motors, Electronics, Steel and Aluminium are existing. Coimbatore City is popularly known as the Textile Capital or Manchester of South India.

The Commissioner of City Corporation, Coimbatore had invited proposal for the preparation of Detailed Project Report for Improving and revamping the Existing/Proposed Water Supply Scheme with 24x7 in Coimbatore Municipal Corporation. The LOI was issued to M/s Fichtner India vide ROC No. 29760/2006/WSI dated 8.09.2008 by the Commissioner of Municipal Corporation, Coimbatore. The first stage of this assignment, the Inception Report was submitted to the Coimbatore Corporation during November 2008 followed by Interim report during March 2009, Draft Final Report during July 2009 and

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

the final DPR was submitted during March 2010 in accordance with the suggestions of the State Level Technical Standing Committee constituted by Directorate of Municipal Adminsitration, Government of Tamilnadu, Chennai, City Technical Advisory Group (CTAG) / City Voluntary Technical Committee (CVTV), Elected Representatives of Coimbatore Corporation. Further to the submission of the DPR, M/s Fichtner India has revised the DPR as per Minutes of Principal Secretary, MA&WS as requested by Coimbatore corporation vide corporation letter Roc.No.2896/08/JN-5 dated 16.12.2011.In addition to the above, the Technical suggestions received from TNUIFSL, Chennai has been incorporated and submitted as requested by the Coimbatore corporation vide corporation letter Roc.No.2896/08/JN-5 dated 15.02.2012. Subsequently, M/s Fichtner India has made a power point presentation to Commissioner, Coimbatore Corporation and further to Commissionarate of Municipal Adminsitration, Chennai, Government of Tamilnadu along with special invitee of Water Supply and Sanitation Specialist of World Bank for onward forwarding of the DPR to the State Level Nodal Agency as requested by the Coimbatore Corporation vide corporation letter Roc.No.2896/08/JN-5 dated 07.02.2013. The Technical suggestions received from CMA, Chennai has also been incorporated and submitted as Revision Number I of the DPR. The same DPR has been appraised to SLTSC (State Level Technical Steering Committee of Tamil Nadu). The appraised DPR has been forwarded to Ministry of Urban Development, Government of India through Tamil Nadu Nodal agency, TUFIDCO for funding under JNNURM – II Section via official letter no.TUFIDCO/JnNURM/GoTN/M(Mu)/501/2013 dated 23.08.2013. The same DPR has been technically appraised by CPHEEO, MoUD, GOI and their suggestions and commnets has been incorporated and submitted herewith as final DPR.

Project Site Appreciation & Rationale for Water Supply Improvements

The population has grown from 0.47 lakhs in 1911 to 9.30 lakhs in the year 2001 with an average annual growth rate of 2.7 % and an average decadal growth rate of 27.34%. The population of the Local Planning Authority is 16.40 lakhs covering an area of 105.60 Sq.km. The availability of power, clubbed with raw material availability for textile processing, from 1935, has led to the establishment of many industries resulted in a nearly 52% increase in population during 1941-1951. The city has registered the decadal growth rate of 49.20 % during the period 1971- 1981. This is attributed to the up gradation of Municipality to the status of Corporation, whereby additional areas were included in its jurisdiction.The geographical location details of Coimbatore Corporation as per Survey of India topographical map are Latitude: 10o 58’00” N & Longitude: 76o 58’ 00”E. The present water supply to Coimbatore Corporation is 137 mld for a population of 1.10 million at the pro rata supply of 125 lpcd, from two water supply schemes, namely,

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Siruvani & Pillur. a) Siruvani Water Supply System: At present, 75 Mld of treated drinking water from the existing Siruvani Water Supply Scheme is being supplied to the Coimbatore Corporation with head works (Siruvani Reservoir) at Attapady Valley in Palakkad District of Kerala State, at a distance of 40 km from Coimbatore. The raw water is conveyed through a tunnel to the treatment plant at Siruvani Adivaram. After full scale treatment, clear water is conveyed by gravity through 1000 mm PSC pipes to the Master Service Reservoir at Bharathi Park from where it is fed to the Service Reservoirs in Western Zone of the town and distributed through the network of distribution system. The scheme is in operation since 1982. b) Pillur Water Supply System: Another scheme with the Pillur Reservoir situated at the foothills of Nilgiris in Western Ghats as source was implemented in the year 1995 for Coimbatore Corporation, 22 Towns and 523 Rural Habitations. The total installed capacity is 125 Mld and Coimbatore corporation gets 62 Mld from this scheme. Raw water is drawn through intake well cum pump house located in Pillur Reservoir and conveyed through 1500 mm dia. MS pipes and tunnel of length 3.850 km at Periakombai hills to the treatment plant at Velliangadu. The treated water is pumped from WTP through the clear water tunnel of 0.9 Km long at Kattan hills. The water is gravitated from the tunnel to the Master Service Reservoir at Ramakrishnapuram from where it is fed to the Service Reservoirs in Eastern Zone of the town and distributed through the network of distribution system. The requirements of other beneficiaries are tapped at suitable locations.

Population and Demand Forecast Population projection is done as per Geometric Incremental Method as this method is mostly applicable for growing towns and cities having vast scope of expansion as described in CPHEEO, under Clause 2.2.7 on Population Projection. The same method has also been approved or followed under JNNURM Project for Pillur II Scheme, which is the Terms of Reference for this project. Table No. 1 – Population Projection (Geometric Incremental Method) Sl No Year Project Stage Population (Nos) 1 2011 Census Population 10,61,447 2 2014 Base Year 11,10,933 3 2029 Intermediate Stage 13,95,199 4 2044 Ultimate Stage 17,52,203

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

The base year for the proposed scheme is taken as 2014 (as requested by the Corporation vide corporation letter Roc.No.2896/08/JN-5 dated 15.02.2012) with the 2011 Census population as basis for population projection. The details of water demand for the intermediate and ultimate stage are given in Table No.2 and Table No.3 below, Table No. 2 - Details of Water Demand for Intermediate Stage (2029) Sl.No. Description Requirement 1 Intermediate population in the year 2029 (Nos) 13,95,199 2 Demand at 135 lpcd (Mld) 188.352 3 Demand including losses @ 15% (Mld) 216.605 4 Industrial and Commercial demand (Mld) 9.978 Sub Total (Mld) 226.583 5 Deduct supply from existing Siruvani scheme (Mld) 75.000 Balance Requirement (Mld) 151.583, Say 152

Table No. 3 - Details of Water Demand for Ultimate Stage (2044) Sl.No. Description Requirement 1 Ultimate population in the year 2044 (Nos) 17,52,203 2 Demand at 135 lpcd (Mld) 236.547 3 Demand including losses @ 15% (Mld) 272.030 4 Industrial and Commercial demand (Mld) 17.250 Sub Total (Mld) 289.280 5 Deduct supply from existing Siruvani scheme (Mld) 75.000 Balance Requirement (Mld) 214.28, Say 215

Strategy for Water Supply Improvements

In order to meet the requisite water demand in the intermediate stage in 2029 and in the ultimate stage in 2044, improvements to water supply in Coimbatore is classified as follows:

(a) Restructuring of existing water supply system comprising of replacement of all existing and old distribution PVC pipelines with solution joints not suitable for both the hydraulic design and pressure requirements, in both Pillur & Siruvani distribution systems.

(b) Restructuring of Siruvani water supply system to 75 Mld for both Intermediate and Ultimate requirement, since it is an interstate source and possibility of tapping additional quantity is remote.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(c) Augmentation of water supply from Pillur reservoir to meet the balance ultimate demand of 214.280 Mld for the entire corporation.

(d) Augmentation of additional Storate tanks for the intermediate demand.

(e) Provision of special components / control and instrumentaions for a pressured continous water supply system from the present intermittent supply.

Cost of the Project The total cost of the project is estimated as Rs556.57 Crores (As per Schedule of Rates 2016–2017)

1 Sector Background, Context & Broad Project Rationale

1.1 Project Site Appreciation

Coimbatore is the district head - quarters of Coimbatore district located at 495 Km south west of Chennai. This is the third largest city in Tamilnadu and has numerous textile mills and small scale engineering units. Historical reference of Coimbatore city dates back to 1200 AD. Ruled by Cheran rulers, the city was developed as strategic town during the Nayakas rule of Madurai. Tippu Sultan conceded the town to British colonialists in 1799, who subsequently promoted Coimbatore as the military transit town between Palghat in the west and Gazal Hatty in the north. Beginning 1879, the city has started to emerge as an administrative and industrial town in its own merit. In the year 1866, Coimbatore was constituted as a Coimbatore Municipal Town with an area of 10.88 sq. km. The Madras- Podanur rail link passing through Erode was opened in the same year and thus its connectivity to the other region was improved. The Coimbatore Municipality was upgraded to Municipal Corporation during May 1981 and spreads over an area of 105.60 sq. km.

1.1.1 Physical & Geographical Characteristics

The city is traversed, in the middle, by the river Noyyal rising from the Vellingiri hills on the West. It is surrounded by the Nilgiris, a rich tea producing hinterland in the North, Pollachi, the receiving center for forest production in the South and the Cochin Harbor in the South West. The towns of Mettupalayam, Pollachi and Tirupur are within a radius of 40 Km. from Coimbatore. The Regional setting of Coimbatore is explicated in Dwg No: 10/1811150/WSS/WIN/001, Volume VI part of this DPR.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

1.1.2 Topography Coimbatore Corporation is having a gradual slope from the West to East and north to south except some pockets like Race Course and Ram Nagar. The ground level varies generally from + 440.00 to + 390.00 mm from MSL.

1.1.3 Geology The area is underlined by high grade of metamorphic rock of peninsular gneissic complex. These rocks are moderately weathered. The major rock types occurring in the area are Biotitic gneiss and Charnockite. The permeability rate varies from medium to poor, depending upon the soil texture. It was reported that the over-exploitation of ground water has caused heavy decline in ground water level in the Corporation area.

1.1.4 Soil The soil in most of the areas is black cotton soil.

1.1.5 Structure & Tectonics The crystalline rocks of Achaean Age are the primary rocks which have undergone varied degree of metamorphism, exhibit secondary structural features like joints and fractures or lineaments.

1.1.6 Weathering The crystalline rocks of the Coimbatore area are highly variable depending upon the structure, mineral and chemical composition of the rocks. Gneiss in general is less resistant to weathering than charnockite and granite due to highly foliated and fissile nature. The average depth of weathering in this block is 15 m and the maximum is about 30 m from G.L.

1.1.7 Alluvium & Kankar Occurrences of alluvium are seen whereas extensive surface cover of Kankar is noticed. Kankar, which is a product of chemical weathering of the country rocks, is a hard, indurated, white to buff coloured material composed of calcium carbonate. Precipitation is the main source of recharge. There are no perennial rivers or noticeable canal command system to promote recharging.

1.1.8 Climate and Rainfall

The mean daily temperature during summer varies from 36° C to 41° C and during winter varies from 14° C

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

to 31°C. The influence of the western ghat is predominant in this region. The area receives rainfall mainly from North East monsoon and the contribution from South west is marginal. The average annual rainfall of Coimbatore city is 623 mm where as it is 714.00 mm for Coimbatore district.

1.1.9 Industrial Activities

There are a number of textile mills in and around the city run by Government and by private companies. Well established handloom textile manufacturing units, big and small foundries engaged in the manufacturing of deep well motors and pump sets for agricultural and domestic purposes, a famous cement manufacturing unit in Madukkarai at 10 kms from the city and 3 big textile machinery manufacturing units, etc provide employment to thousands of people and contribute to the industrial growth of the region and the state. Coimbatore has also attracted investment in hi-tech industries in the recent years, especially in the field of solar energy and computer software.

1.1.10 Existing Status of Physical Infrastructure

(i) Status of Water Supply Infrastructure

The City Engineer and his team of Engineers and Staff are responsible for ensuring protected drinking water supply in the city. The city requires 165 Million litres of water daily at present. On an average, the per capita supply is maintained at about 125 lpcd (litres per capita per day) by supplying 137 Mld.

Protected water supply for Coimbatore town is provided through two major water supply schemes. Fig. No. 1 - Siruvani Dam – Downstream View

1. Siruvani Water Supply Scheme - 75 Mld

2. Pillur Water Supply Scheme I - 62 Mld

Total present supply - 137 Mld

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

The head works of both water supply schemes are operated and maintained by Tamil Nadu Water Supply and Drainage Board and they supply bulk water to two different Master Service Reservoirs maintained by Coimbatore Corporation. From these two separate Master Service Reservoirs, water supply is being distributed through 49 elevated service reservoirs and sumps about 640 km of existing distribution network.

Fig. No. 2 - Pillur Dam – Downstream View The water level of Siruvani dam touched the dead storage level during 2004 due to monsoon failure and the supply level was reduced to 25 Mld against normal supply of 75 Mld. As a temporary solution the needs of the Siruvani fed area is met with by interconnecting Pillur water supply and Siruvani water supply networks wherever possible. Services / Functions

 Operation and Maintenance of headworks for water supply and distribution of drinking water to house holds and public fountains.  Sanctioning new house service connections  Conveyance and distribution of water for private and public uses  Billing and collection of water charges  Creating awareness among people to conserve water and construct Rain Water Harvesting structures

(ii) Source - Pillur (Bhavani River) source Pillur Dam was constructed in Bhavani River, a tributary of Cauvery. The Dam is located in the downstream of the confluence point of its main tributary Kundha River which originates in the Nilgiris hills of Western Ghats. The average rainfall of the basin is ranging from 1000 mm to 4000 mm. The catchment of the river lies in both

28 Fig. No. 3 - Pillur Dam

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Tamil Nadu and Kerala states and forms part of the Western Ghats.

There are three hydel power projects in the upstream of Pillur Dam. The major tributaries are Siruvani, Kodingiyar & Varahapallam Rivers. Kunda River is confluencing in river Bhavani in the upstream of Pillur Dam. The total storage capacity of Pillur Dam is 1566 Mcft and FRL is 426.72 m and Dead Storage level is 356.60 m. The minimum inflow into the Dam is 600 cusecs. About 53.65 cusecs (131.25 Mld) is already tapped for Pillur Scheme I. Hence another 53.65 cusecs (131.25 Mld) of water may be Fig. No. 4 - Raw Water Intake Well at safely tapped from the Dam for Pillur Scheme II. Pillur Reservoir

Existing Pillur Scheme I - Salient details

Source : Pillur Reservoir across River Bhavani. Head works : Collection well - 21 m dia Raw water pumpsets : 6 x 442 HP (2 Nos. standbye) Vertical Turbine pumpsets of duty 91200 lpm x 61.99 m Raw water pumping main : 1500 mm dia MS pipe - 482 m Raw water Tunnel at Periyakombai Hill : 3850 m long, 2.20 m size D’ shaped tunnel Raw water Gravity main : 1500 mm dia PSC pipe 1050 m Water Treatment Plant at Velliyankadu: 131.25 mld consists of pre-sedimentation Tank, Aerator, Clariflocculator, Filter house, Clear water reservoir and Sump-cum-pump house etc.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Clear water pumping main : 1500 mm dia PSC / MS pipe - 10870 m Clear water tunnel at Katten Hill : 800 m long, 2.20 m size D’ shaped tunnel Clear water Gravity main upto MSR : 1500 & 1000 mm dia PSC pipe - 23700 m Master Service Reservoir (MSR) at Ramakrishnapuram : 30 Lakh litres Feeder mains : 43 km Service Reservoirs & Sumps : 23 Nos.

(iii) Source - Siruvani River Source Source : Siruvani Dam Head works at Attapady valley in Palghat district,Kerala : Intake tower 6 m dia Raw water Tunnel : 1550 m length, 1.80 x 2.10 m Pick up weir & Raw water Gravity main : The water from the dam let out in the Anayar stream at tunnel exit is picked up at Adivaram by a pick up weir, after its travel through a length of 1.6 km in the Anayar stream. The water heading up at the pick up weir is let into a Collection well and conveyed to the Treatment works through 1000 mm dia PSC pipes. Treatment Plant at Siruvani Dam Adivaram : 106.50 mld consists of Aerator, Clariflocculator, Filter house and Clear water reservoir Clear water Gravity main upto MSR : 1000 mm dia PSC pipe 31330 m Master Service Reservoir at Bharathi Park : 38.00 Lakh litres Service Reservoirs & Sumps : 26 Nos.

(iv) Present Water Distribution Zones

Initially there were 25 service reservoirs (226.39 LL) in the city.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

After commissioning of Pillur Scheme-I, the city is served by 46 service reservoirs. Further 3 SRs located at Vysial Street under Siruvani Scheme & Rathinapuri and Maniakarampalayam under Pillur Scheme-I are not in use. The balance service reservoirs of 236.50 LL capacities get water from Pillur Source. The total area has been divided into 5 water supply zones and 43 sub-zones for effective operation and maintenance. Details of existing five water distribution zones are given in Table No. 1.1

Table No. 1.1 - Details of Water Supply Zones No. of Population Base Zone No. Zone SRs & No. of HSC Source year (2006) Sump I HLR-Bharathi Park 11 164064 18429 Siruvani II LLR-Gandhi Park 10 254706 21387 Siruvani MSR- 13 III 169592 22467 Pillur & Siruvani Ramakrishnapuram IV Singanallur 10 226756 26456 Pillur V Sungam 5 210157 17382 Pillur & Siruvani Total 49 1025275 106121

(v) Master Service Reservoirs Water is supplied to the city through the Master Service Reservoirs at Barathi Park & Ramakrishnapuram. These two master service reservoirs are supplying water to other service reservoirs. These two MSRs also supply water to their command area. The MSR at Ramakrishnapuram is fed by the gravity main from clear water tunnel at Katten hill under Pillur Scheme I. The MSR at Bharathi Park is fed by the gravity main of Siruvani Scheme.

(vi) Service Reservoirs Fig. No. 6 - Ramakrishnapuram MSR

Table No. 1.2 - Details of Service Reservoirs & Sumps

Capacity LWL MWL Sl. No. Zone Location of SR No. GL (m) Source (LL) (m) (m)

I I

S 1 I Dewan Baghadur Road 1 28.00 426.80 440.80 445.00 R U V A N

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Capacity LWL MWL Sl. No. Zone Location of SR No. GL (m) Source (LL) (m) (m) 2 Koilmedu 1 2.00 440.00 453.00 456.00 Nataraj layout (Boopathy 3 1 20.00 439.00 452.10 456.70 layout) 4 Venkatapuram 1 2.00 440.00 453.00 456.00

5 Bharathi Park MSR 5 38.87 432.00 443.00 447.00 Chinthamani Nagar 6 1 5.00 439.00 450.00 453.00 (Sanganur Part A) 7 Tatabad 1 11.00 426.00 434.80 438.00

8 Gandhi Park OHT 2 19.80 427.75 424.30 421.25

9 Gandhi Park 2 22.72 427.75 434.95 431.30

10 D.B.Road Near 3 Post 1 20.00 427.75 434.95 431.30

11 Jeyaram Nagar 1 10.00 414.00 431.44 428.44 II 12 Madathur (P.N.Pudur) 1 5.00 439.00 446.00 443.00

Iswarya Nagar SIRUVANI 13 1 10.00 424.00 434.43 440.43 (Seeranaicken Palayam) 14 Revathi Nagar (Linamar) 1 3.00 422.70 434.00 431.00

15 Vysial Street 1 9.00 409.00 422.60 426.80

Jai Nagar, 16 1 10.00 427.43 451.14 455.14 Goundampalayam R.G.Nagar (Kannappa 17 1 6.00 438.29 432.14 465.14 Nagar)

18 Kamarajapuram 1 6.00 426.74 429.50 432.50 SIRUVANI

19 Rathinapuri (Not in use) 1 6.00 426.00 432.00 435.00 Ramakrishnapuram 20 1 30.00 428.86 443.86 447.86 III (Ganapathy MSR)

Ganapathy Ma Nagar 21 1 3.00 428.86 443.86 446.50 (7.00-Sump) TNUDP Colony Gandhi 22 1 6.00 428.86 443.86 446.50

Ma Nagar (11.00-Sump) PILLUR Krishnarayapuram Zone I 23 1 2.50 409.22 424.63 427.63 Avarampalayam Krishnarayapuram Zone II 24 1 3.00 409.49 422.44 425.44 Kamadenu Nagar

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Capacity LWL MWL Sl. No. Zone Location of SR No. GL (m) Source (LL) (m) (m) 25 Rayappa Nagar 1 15.00 423.63 434.07 437.07 Maniakarampalayam Zone- 26 1 1.00 410.00 416.00 419.00 I (Not in use) 27 V V Nagar 1 0.50 429.00 435.00 439.00

28 Police Quarters 1 0.50 429.00 435.00 439.00

29 Peelamedu Zone I 1 15.00 414.50 425.50 429.00

Peelamedu Zone II 30 Uppilipalayam Zone III 1 10.00 406.29 420.29 423.79 Part D.J.Nagar

Karunanidhi Nagar 4.00 397.66 410.66 412.66 31 1 (2 tier) 6.00 397.66 417.66 420.66 Sowripalayam Zone I 32 Udayampalayam (Meena 1 5.00 401.00 409.00 412.58 Estate) IV Sowripalayam Zone II G.V 33 1 6.00 394.65 409.65 412.65 Residency

PILLUR

Uppilipalayam Zone I 34 1 10.00 403.00 411.00 414.11 VRP

Anna Nagar 35 1 16.00 389.11 404.11 407.61 Neelikonampalayam

36 Singanallur 1 7.00 396.00 398.00 401.00

37 Nethaji puram 1 12.00 387.491 399.491 403.141

38 SIHS Colony (7.00-Sump) 1 3.00 400.00 412.00 415.65

District IV -B 39 1 20.00 423.50 429.10 433.30 Sidhapudur

District IX -B 40 1 24.00 405.00 415.80 420.00 Puliakulam

V PILLUR District IX -A 41 1 16.00 409.00 422.60 426.80 Townhall

42 V.O.C Park 1 27.00 423.00 435.80 440.00

SIRU

VANI

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Capacity LWL MWL Sl. No. Zone Location of SR No. GL (m) Source (LL) (m) (m)

43 Nanjundapuram 1 2.00 390.80 403.80 407.00

Grand Total 49 478.89

(vii) Existing Water Distribution System

Table No. 1.3 – Existing Water Supply Scenario

S.No Description Details 1 City Coimbatore 2 Status Corporation 3 Area 105.6 Sq.Km 4 Topography Elevation varies from 390m to 440 m 5 Wards 72 (New) 60 (Old) 6 Water Supply Zones 5 7 SRs & Sumps 49 Nos (41 SR’s & 8 Sumps) 8 Distribution Pipes 1122 Km 9 HSCs 106121 Intermittent Supply - 125 Lpcd (As per ToR) 10 Present Service Level (Once in 2/3 days for 2 to 3 Hours) 11 Proposed Service Level 135 Lpcd 12 Population 11,10,933 (As per 2011 Census Population)

The total length of the existing distribution network in Coimbatore Corporation is around 1122 km. Size of pipes in the distribution system ranges from 45 mm dia to 237.8mm dia PVC, 80 mm to 600 mm dia CI, 80 to 450 dia AC and 300 and 1000 mm dia PSC pipes. The length of PVC, CI, AC and PSC pipes in the existing system is given in Table No. 1.4, Table No. 1.5, Table No. 1.6, Table No. 1.7 and Table No. 1.8 respectively.

Pipe networks are not laid for some stretches of roads within Corporation boundary. So, there are many uncovered areas in the town and these areas are dependent on water supply through tankers. The total length of roads not covered by existing water distribution system is about 253 km. The new distribution network

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

provided is 1377 km and along with rider mains (a secondary line of 100 mm Diameter proposed parallel to primary mains on the same road to avoid direct tapping from primary mains for House Service Connections).

In each zone, it is noticed that the allotted quantity for that specific zone is distributed to a significantly higher number of water supply service connections than originally stipulated without requisite technical assessment, resulting in low pressure conditions in most of the areas. This results in residents not receiving sufficient quantity of water at minimum residual pressure even during normal season, when adequate supply is distributed to the town. This is primarily due to the indiscriminate extension of pipelines that have been originally designed to serve only a specified number of service connections and distribution zone. In order to eliminate this problem, the entire system has been redesigned with new distribution network covering the entire Corporation area.

The prevailing problems in the distribution network, ward wise was listed down by the Councillors and the remedial nmeasures for the same was listed down and enclosed in Volume I (b), Annexure Number – A2, part of this DPR.

Table No. 1.4 - Length of PVC Pipes in Existing System PVC ID Size in mm S.NO ZONE 45 59.60 71 85.3 118.7 152 170.9 190.1 213.8 237.8 Total 1 North Zone 0 865 105685 0 114516 1912 0 0 0 0 2 South Zone 0 865 14949 18489 32065 0 4378 2040 558 0 3 West Zone 0 1556 43880 0 90557 802 594 1202 0 257 Total Length of Pipes 4 Demo Zone-1 0 0 4792 5183 6422 751 542 0 0 0 5 Demo Zone-2 0 0 21135 183423 77016 4121 0 0 0 TOTAL 0 3286 190440 207095 320575 7586 5513 3242 558 257 739 Km

NOTE : The PVC pipes are jointed using solvent cement. Table No. 1.5 - Length of CI Pipes in the Existing System

CI Pipe Size in mm S.NO ZONE 80 100 125 150 200 250 300 350 400 450 500 600 700 Total 1 North Zone 0 0 0 156 0 0 0 0 0 0 0 0 0 2 South Zone 4946 11143 7905 3223 1932 746 1788 0 158 0 0 0 0 3 West Zone 3688 14968 5023 2529 1017 1112 1982 315 0 2531 533 0 0 Total Length of Pipes 4 Demo Zone – I 16384 54060 2438 8638 4581 1501 3457 0 0 850 0 0 0 5 Demo Zone - II 21615 1129 0 1237 6298 857 3232 739 0 1179 29 0 100 TOTAL 46633 81300 15367 15783 13828 4216 10459 1054 158 4560 561 0 100 194 Km

NOTE : The CI pipes laid in 1976 under Siruvani project for 34 km and the balance 160 km CI pipes laid under Pillur project in 1998.

Table No. 1.6 - Length of AC Pipes in the Existing System AC Pipe Size in mm S.NO ZONE 80 100 125 150 200 250 300 350 400 450 Total 1 North Zone - 3317 3660 1534 6059 1970 1348 1643 - - 2 South Zone 9059 10127 2408 2764 2212 2386 - - - 3 West Zone 1759 7719 2571 5445 4429 1466 1221 - - - Total Length of Pipes 4 Demo Zone – I ------5 Demo Zone - II ------TOTAL 15808 21163 8639 9743 12700 5822 2569 1643 - - 78 Km

NOTE : The AC pipes joints are observed to be with frequent leaks and burst in the system.

Table No. 1.7 - Length of PSC Pipes in the Existing System PSC Pipe Size in mm S. NO ZONE Total 1000 1100 1200 1 North Zone - - - 2 South Zone - - - 3 West Zone 62 - - Total Length of Pipes 4 Demo Zone – I - - - 5 Demo Zone - II - 1374 3166 TOTAL 62 1374 3166 5 Km

Table No. 1.8 - Abstract on Length of Existing Pipes in Distribution System S.No. Material Abstract Length (Km) 1 PVC 785 2 AC 166 3 CI 169 4 PSC 2 TOTAL 1122 Km

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

1.1.11 Seismicity

Coimbatore region is susceptible to earthquake among the various other natural hazards like cyclone, drought, heat, epidemics, underground fire, fire accidents and floods. The entire area of Coimbatore is reported to be prone to earthquake any time. The potential impact of such a hazard would be loss of life, livestock and infrastructure. As per IS 1893 (Part 1): 2002, Criteria for Earthquake Resistant Design of Structures, Coimbatore city lies in Zone-III. According to the Seismic Hazard Map of 2000 of BIS shown as below, Coimbatore lies in the moderate damage risk zone and in the earthquake hazard area.

Thus, in view of the factors mentioned above and the possibility of damage, due for construction of buildings, guidelines as per IS 1893 (Revised 2002) have to be adhered to. Further, hazard reduction measures need to be adopted including creating awareness in the people regarding the hazard and developing preparedness is of utmost importance.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

1.1.12 Groundwater Quality and Quantity The chemical quality of ground water in the district is generally influenced by recharge, draft and nature of soils, irrigation practices etc.In order to study the chemical quality of ground water and evaluate the suitability for drinking purposes, the water quality monitoring is being done in the bore well at Coimbatore Corporation (Selvapuram and Ondipudur observation wells of TWAD Board).High values of TDS are noticed which are more than permissible limit. The chemical parameters observed at Coimbatore Corporation are given in Table No.1.9. Table No. 1.9 - Quantity of TDS level measured in Ground water

2004 2005 2006 Total Dissolved Solids Jan May Jan May Jan May 3990 4375 3640 4368 3934 3433 i Quality of water is generally not potable due to excess TDS recorded. ii Tapping additional quantity of about 125 Mld in the crystalline metamorphic terrain like Coimbatore area is not at all feasible as it will affect the entire aquifer system of the area. iii Formulation of Water Supply Improvement Scheme for Coimbatore Corporation based on the local ground water or surface water is not dependable both qualitatively and quantitatively because of the over extraction of groundwater for Domestic, Agricultural and Industrial purposes as well as deterioration of water quality in the years of summer period. iv Hence a sustainable and assured source of water from Pillur Dam is being implemented to satisfy the increasing demand of drinking water, particularly in this area, where scarcity of water is being experienced during the years of scanty and erratic rainfall.

1.1.13 Financial Status of the Local Body Table No. 1.10 - Overall DCB Statement for CCC for the Past 5 years

DCB Statement 2004-2005 2005-2006 2006-2007 2007-2008 2008-2009

Demand 16,51,43,798 18,83,89,745 21,06,73,277 20,83,14,830 22,22,60,059

Collection 10,45,83,539 11,49,08,127 14,56,79,240 14,05,11,964 15,29,73,742

Balance 6,05,60,259 7,34,81,618 6,49,94,037 6,78,02,866 6,92,86,317

1.1.14 Sewerage Infrastructure

The City Engineer and his team of Engineers and staff are entrusted with the responsibility of maintaining this service. The Coimbatore City Sewerage system has been divided into 6 zones. The

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

UGD system has been functioning in old developed areas from 1983 in zone 1 and 2 and from 1994 in zone 3 to a total length of 52.30 km. Nearly 19000 Residential and Non residential buildings have been provided with service connections. There are two pumping stations at Ukkadam and at Nanjundapuram to pump sewage to the STP at Vellalore. Treated effluent is being used for Horticulture and Golf ground maintenance purposes. The estimates for providing UGD in zones 4, 5 and 6 have been prepared. The Government has accorded Administration Sanction for the project and the same is being under implementation.There are 19,897 house sewer connections. It is proposed to extend underground drainage system to the added areas at a cost of Rs.250 Crores by identifying funding agency for the project.

1.1.15 Sewage Farms

The Corporation has two sewage farms covering an extent of 815 acres: Ukkadam (115 acres) and Vellalore (700 acres). The Corporation has undertaken an ambitious programme of tree plantation in an area of about 150 acres in the Vellalore sewage farm with the help of the state forest department. Around 55,000 saplings have already been planted. The details of the existing sewerage service and connection charges are given in Table No. 1.11.

Table No. 1.11 - Details of Existing Sewerage Service & Connection Charges

Avg. annual sewerage service One time sewerage connection charges for new & existing charges at the time of new Based on connections connections Property tax Domestic (Rs) Commercial (Rs) Domestic (Rs) Commercial (Rs)

Upto Rs.300 200 500 1250 2400

Rs.300 - 1000 1450 3200 4500 10000

Rs.1000-5000 4700 8500 9000 17500

Above Rs.5000 7750 16500 14500 24000

Source: UGSS Report for Coimbatore City

1.1.16 Storm Water Drains

The Corporation maintains 603.50 kms of storm water drains. About 40 kms of new storm water drains are being constructed and added every year. At present, there is a full fledged storm water drainage facility in most part of the Corporation. The storm water finds its way towards the nearby Sanganur Pallam Odai and ultimately joins with the Noyyal River at Singanallur area. Besides, during the heavy rainfall time and frequent flash flood situations in the corporation area, the storm water

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM system should be capable of quick disposal of the rain water and also it should prevent any damage to life, properties, business and transportation etc. The sullage and part of sewage are collected through the storm water drains and finally finds its way towards the nearby Noyyal River through its canal system.

1.1.17 Solid Waste Management

Solid waste management in the city is entrusted with the Health Department and Engineering Department. The aim of the City Municipal Corporation is 100% collection of garbage generated in the city daily. The area of the city is 105.60 Sq.km. This is divided in to 72 wards (Old) and 60 wards (New). The entire streets in the above 72 wards (Old) are put into blocks for the purpose of sweeping. Waste generated in the city is about 500 tonnes per day.

The waste generated is swept and collected in 700 dustbins and 201 containers which are distributed in various street corners and dumper boxes. 2457 Sanitary Workers are employed by this Corporation. The collected garbage is transported to dust bins by hand-drawn push carts.All the streets in 72 wards (Old) are divided in day blocks and there are 2457 scavengers in this Corporation. All the garbage collected is removed through tractors engaged on hire by the Corporation to the compost yard at Vellalore.

1.1.18 E-Governance In this Corporation, data relating to property tax, water charges and non-tax items have been computerized and are collected through computerised service centres / selected banks. Computerised Service Centres are functioning on all working days from 10.00 A.M. to 5.P.M. so as to enable the public to remit the tax directly. Public can ascertain the details of property tax dues etc., from the Computerised service centres during the working hours. Birth and death certificates are issued through computer service centres and there is also facility to register the complaints of the public through phone.

1.1.19 Web site Public can get general information of the Corporation.

Public can have the details of all activities of Corporation through the WEBSITE. WEBSITE: www.coimbatore-corporation.com E-Mail ID : [email protected]

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

1.2 Existing Tariff and Cost Recovery

The levy of water charges is under stepped tariff system from 01.04.2003. The corporation is collecting the following service connection charges. The existing water tariff is detailed in Table No.1.12. New Water Supply connection charge is Rs.2000.

Table No. 1.12 - Existing water tariff Rs. per 1000 litres/month Domestic (Rs.) Non-domestic (Rs.) Upto 50,000 3.50 7.00 50,001 to 100,000 4.00 9.00 100,001 to 150,000 5.00 12.00 Above 150,000 6.50 15.00

METERED CONNECTIONS S.No Consumption (m3) Domestic Non Domestic Bulk Domestic Bulk Non domestic 1 1 - 50 m3 3.50 7.00 3.50 7.00 2 50 - 100 4.00 9.00 4.00 9.00 3 100 - 150 5.00 12.00 5.00 12.00 4 Above 150 6.50 15.00 6.50 15.00 Bi-Monthly 5 80.00 600.00 350.00 900.00 Minimum Domestic users are allowed a free allowance of 100 litres per day Supply on a per tap basis is allowed at Rs. 50.00 per tap connection per month Note :

1. All connections are metered and consumers are billed every 2 months

2. Water bills are paid at the water utility office at banks, through bill collectors and at CCMC

3. There were 3240 new connections in 2005-06. The price of a new domestic connection is Rs.3000 payable prior to connection

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2 Project Definition, Concept and Scope

2.1 Project Area

The project area is the Coimbatore City Corporation area, having 72 wards (Old) , covering 105.6 sq km area.

2.2 Scope of Work

Preparation of DPR Part I (i) For improving and revamping the existing water supply distribution net work with assured storage facilities for uninterrupted 24 X 7 water supply facility to the entire Corporation area Part II (ii) For design, operation, maintenance of uninterrupted 24 X 7 water supply facility to demo zones I & II in Coimbatore Corporation

Part III

(i) Design of TwoTunnels having capacity of 265 Mld for Raw Water and 250 Mld for Clear Water

(Aready submitted separately to Coimbatore Corporation vide FI/letter no 3350810001/018 dated 25/01/10)

2.3 Objectives

2.3.1 Objective: A Objectives of implementation of un-interrupted Water Supply to the entire city: 1. Implementing good engineering practices to upgrade existing network including replacement of old worn out pipes. 2. Studying in detail the existing distribution network, zones, sub zones and revamping the existing water supply network and providing the additional storage reservoirs wherever necessary for 24 X 7 un-interrupted water supply including disinfection methods. 3. Increasing the zones and sub zones with assured storage facilities for entire city. 4. Providing consumers with an 24 X 7 un-interrupted water supply at desired pressure 5. Reduction of Un-account for Water (UFW) to within 15% by reducing leakages and unmeasured

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

supply. 6. 100% metering with good quality meters having long life spans. 7. Improving billing mechanism (Reading, bills generation & distribution) to reduce time & cost per bill including spot billing system etc. 8. Better services to urban poor by implementation of slum policy of Government of Tamilnadu. 9. Attending consumer complaints within short time. 10. Improving the satisfaction of stake holders. 11. Accountability on design, implementation, and O&M with single agency through performance based contract and bench marking of services. 12. Implementing the lessons learnt from pilot zones to other parts of city. 13. Digital map of each rezoning distribution network to the entire city. 14. Preparation of detailed project report and Bid Document including the plan polio.

2.3.2 Objective: B 1. To introduce continuous, pressurized and improved water supply services in the Demonstration Zones for a period of 5 years. 2. To undertake a structured prudent rehabilitation program of optimizing the performance of existing infrastructure assets to improve the efficiency of the water supply service in the Demonstration Zones. 3. To establish, within the chosen Demonstration Zone, an efficient and effective customer contact centre offering billing, collection and complaint redressal support services. 4. To operate, maintain and manage the water supply services at the specified performance levels or higher in the Demonstration Zone. 5. To provide efficient and effective metered, measured and monitored water services ensuring equity and cost recovery at the tariff levels fixed by Coimbatore City Municipal Corporation from time to time. 6. Preparation of DPR as per TOR including bid documents.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2.4 Selection of Design Basis

Feasibility analysis of the existing water supply system is done to enhance the service level for Continous pressured Water Supply facility for the intermediate & ultimate demand for the city.

The study of the two water supply systems was made on bulk water source sustainability and the following are the observations,

Sources

 The Water that could be drawn from Pillur reservoir for the scheme is 125 Mld, due to the carrying capacity of raw water and clear water tunnels. The supply from the Siruvani System is only 75 Mld. So the total expected supply is 200 Mld. However the Intermediate requirement is 227 mld. So there is a short fall of 27 Mld Fig. No. 7 - Siruvani Dam  In Siruvani source, there is reduction in drawl of water to 50 Mld during poor monsoon periods and the worst reduction experienced is 25 Mld  The Siruvani and Pillur WSSs are interconnected at possible locations to manage the problems on temporary measure

Fig. No. 8 - Pillur Dam As the quantum of supply from Siruvani Water Supply System depends on Kerala state, the original allocation of 75 Mld only could be adopted. The balance 152 Mld could be met from Pillur source which is within Tamil Nadu, to meet the Intermediate Demand of 227 mld, as this is a dedicated scheme for coimbatore corporation and the required decisions to draw additional quantity could be taken by the Corporation themselves at any point of time.

2.4.1 Flow Reliability Analysis on Pillur Source

For augmentation of water supply from any source, it is necessary to establish 95% reliability of flow occurrence at source. Entire water collected at various reservoirs at the upper reaches of river Bhavani are the sources for Pillur. There are about 12 reservoirs at the upper reaches other than Pillur Dam. The entire water comes to Pillur Dam after power generation at various power houses. The immediate

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM power station above Pillur Dam is Kundah Power House III which has an installed capacity of 3 x 60 MW = 180 MW with a maximum discharge of 1800 cusecs. So, there is enough water available after power generation to meet the Intermediate & Ultimate requirement.

A Statement showing the year wise inflow into Pillur Dam Reservoir from 1966 to October 2008, collected from TNEB is furnished below in Table No. 2.1

Table No. 2.1 - Inflow into Pillur Dam Reservoir (1966 – 2008)

Inflow in Inflow in Inflow in Inflow in Year Year Year Year mcft mcft mcft mcft 1966 24112 1976 19378 1986 22072 1997 30806 1967 27459 1977 32105 1987 11943 1998 32951 1968 26153 1978 30545 1988 21900 1999 28009 1969 22489 1979 50467 1989 21694 2000 22918 1970 24665 1980 40546 1990 16995 2001 21277 1971 28356 1981 38400 1991 27913 2002 13075 1972 25523 1982 21268 1992 49432 2003 6897 1973 33062 1983 22256 1993 22524 2004 30001 1974 28655 1984 27459 1994 34148 2005 36992 1975 30952 1985 18595 1995 21820 2006 34497 1996 28470 2007 42358 Upto 18892 10/2008

A flow duration analysis is arrived in order to establish the 95% reliability of flow in the river. It was found that the source reliability for Pillur reservoir is more than 100 %.The details of the calculation was listed in Table No. 2.2.

Table No. 2.2 - Pillur Dam Source Realiability Analysis

Yearly Inflow to Pillur Year Yearly Inflow (Mm3) Inflow (Mld) Requirement (Mld) Excess (Mld) % Excess Reservoir (mcft) 1966 24112 682775887 1870618868 215 1870618653 > 100 % 1967 27459 777552384 2130280504 215 2130280289 > 100 % 1968 26153 740570578 2028960488 215 2028960273 > 100 % 1969 22489 636817640 1744705863 215 1744705648 > 100 % 1970 24665 698435105 1913520836 215 1913520621 > 100 % 1971 28356 802952599 2199870134 215 2199869919 > 100 % 1972 25523 722730963 1980084830 215 1980084615 > 100 % 1973 33062 936211695 2564963548 215 2564963333 > 100 % 1974 28655 811419337 2223066677 215 2223066462 > 100 % 1975 30952 876463141 2401268879 215 2401268664 > 100 % 1976 19378 548723919 1503353203 215 1503352988 > 100 % 1977 32105 909112469 2490719093 215 2490718878 > 100 % 1978 30545 864938183 2369693652 215 2369693437 > 100 % 1979 50467 1429066469 3915250600 215 3915250385 > 100 % 1980 40546 1148135000 3145575342 215 3145575127 > 100 % 1981 38400 1087367040 2979087781 215 2979087566 > 100 % 1982 21268 602242766 1649980181 215 1649979966 > 100 % 1983 22256 630219814 1726629627 215 1726629412 > 100 % 1984 27459 777552384 2130280504 215 2130280289 > 100 % 1985 18595 526551826 1442607742 215 1442607527 > 100 % 1986 22072 625009513 1712354830 215 1712354615 > 100 % 1987 11943 338188140 926542849 215 926542634 > 100 % 1988 21900 620139015 1699011000 215 1699010785 > 100 %

Yearly Inflow to Pillur Year Yearly Inflow (Mm3) Inflow (Mld) Requirement (Mld) Excess (Mld) % Excess Reservoir (mcft) 1989 21694 614305744 1683029436 215 1683029221 > 100 % 1990 16995 481244866 1318479085 215 1318478870 > 100 % 1991 27913 790408234 2165502011 215 2165501796 > 100 % 1992 49432 1399758529 3834954874 215 3834954659 > 100 % 1993 22524 637808729 1747421175 215 1747420960 > 100 % 1994 34148 966963794 2649215874 215 2649215659 > 100 % 1995 21820 617873667 1692804567 215 1692804352 > 100 % 1996 28470 806180720 2208714301 215 2208714086 > 100 % 1997 30806 872328881 2389942140 215 2389941925 > 100 % 1998 32951 933068524 2556352121 215 2556351906 > 100 % 1999 28009 793126652 2172949732 215 2172949517 > 100 % 2000 22918 648965568 1777987858 215 1777987643 > 100 % 2001 21277 602497617 1650678403 215 1650678188 > 100 % 2002 13075 370242814 1014363874 215 1014363659 > 100 % 2003 6897 195301314 535072093 215 535071878 > 100 % 2004 30001 849533817 2327489910 215 2327489695 > 100 % 2005 36992 1047496915 2869854562 215 2869854347 > 100 % 2006 34497 976846374 2676291436 215 2676291221 > 100 % 2007 42358 1199445132 3286151047 215 3286150832 > 100 % 2008 18892 534961930 1465649123 215 1465648908 > 100 % The table above presents the comparative calculation between inflow into the Pillur reservoir and the water requirements of the corporation. The available inflow is well above the quantity of flow to be augmented which is 152 Mld in the intermediate year of 2029 and 215 Mld in the ultimate design year of 2044. Thus, the quantity of water intended for water supply augmentation to Coimbatore Corporation by utilizing the Pillur reservoir as a dependable source has a probability of flow occurrence well higher than the intended 95% dependable flow and can therefore be used to cater to the intended water supply.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2.5 Deficiencies of the Existing Water Supply System

It is evidenced from the above Source Reliability Analysis, that the Pillur source is more than adequate to meet the project requirement. The water quantity is much excess that it can cater to more than multiple times the requirement of the Coimbatore corporation. It is also evidenced that the prevailing Tunnels can carry more water as compared to the intermediate and ultimate requirement of the corporation, if the depth of water flow in the tunnel is increased. So as far as the Bulk water / source of water, Coimbatore corporation possess excess quantity of water and also adequate infrastructure to bring until the Master Service Reservoirs at Ramakrishnapuram. Since Siruvanui being the interstate source, source augmentation / source improvement shall not be possible. Subsequently Pillur being allocated as reliable / perennial source for the corporation, restricting Siruvani to 75 Mld until the ultimate stage of the project.

Under the present scenario, the water supply infrastructure from Master Service Reservoirs to End Consumers namely prevailing service reservoirs, feeder mains, pumpsets, sumps, distribution system pipelines, water meters has been analysed in detail with data collected through field visits, data available from the corporation, etc., After detailed investigation, it is understood that the present service level of the Coimbatore Corporation ranges from 75 lpcd to 125 lpcd (Based on sample studies made) that too with the intermittent supply of 3 to 4 hours a day, once in a 3 to 4 days a week (Under worst case scenario) with residual pressure ranging from 0.1 m to 2 m (Based on sample studies made) at the house service connections.

There was also list of frequent compliant on the present water supply system, exspecially the Distribution System by various Councillors / elected representatives in Councillors Grievances in Zonal meeting. The salient complaint list were as follows,

1. Inadequate Water Supply & inadequate pressure

2. Frequent burst & breakdowns in pipes

3. Contamination due to mixing of sewage

4. Blockage of pipes

5. Water received only when pumped by hand pumps from the HSC

6. Presence of Old pipes with frequent leaks

7. Limited hours of supply The above such complaints were collected by the consultant from the ward wise councillors in the Grievance meeting and the cause for such defeciences, remedial measures was elaobarated to all the councillors attended the meeting. The details of the same was enclosed Volume I (b) Annexure Number – A2 part of this DPR.

51 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2.6 Project Benchmarks

As Coimbatore, one of the major and fast growing industrial hub of Tamil Nadu next to Chennai, the infrastructure should meet the requirements of the growing population. As water supply is one of the basic essential amenities, coimbatore corporation planned to revamp the present intermittent water supply to a 24x7 type of water supply with the salient bench marks envisaged as per the CPHEEO norms. The following Table No. 2.3 illustrates the project bench mark after the implementation of the project.

Table No. 2.3 - Project Benchmarks

S.No Propsoed Indicator After Implementation

1 Coverage of Water Supply Connection 100 % 2 Per capita availability of Water at consumer end 135 lpcd 3 Extent of metering of water connections 100 % 4 Extent of Non – revenue water 15 % 5 Continuity of water supply 24 X 7 6 Efficiency in redressal of customer complaints 80 % Adequacy of treatment & disinfection and quality of 7 100 % water supplied 8 Cost recovery in water supply services 100 % 9 Efficiency in collection of water supply related charges 90 % 10 Number of persons receiving less than 70 lpcd 0 %

2.7 Need for the Project

In order for the corporation to meet the project benchmarks, the prevailing system components were analysed with respect to the objective and are presented in synopsis as below. The detailed calculations, analysis made were presented in Annexure part of this DPR and the proposed system were elaborated in respective portion of the DPR.

1. Existing Feeder Mains

 Mainly of AC, PSC & CI Pipes with frequent Leaks with 78 Kms pipe length

 No Bulk water meters to quantum of water / Inflow or Outflow in the feeder mains

 UFW in Pillur Feeder Main is 23.55 % and in Siruvani Feeder Main is 22.37 % as compared to permissible limit of 5 %. The details of the same are enclosed in Volume I (b) Annexure Number – A4 part of this DPR.

 Direct tapping to Distribution System before Service Reservoirs

 Separate bulk water supply line is observed to Jail area, Railways, etc.,

52 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2. Existing Service Reservoirs & Storage Sumps

 The following gives the list of Service Reservoirs in Dilapted condition and also with less staghing height not suitable for a 24x7 type of water supply system

Ward Number Sl.No. SR Location Capacity (LL) (Old) 1 Maniyakaram Palayam SR 72 1.00 2 Police Quarters SR 72 0.50 3 V.V.Nagar SR 72 0.50 4 V.O.C Nagar Sump 72 0.50 5 Ganapathy Ma Nagar Sump 72 3.00 6 Gandhi Ma Nagar Sump 72 6.00 7 Housing Unit Sump 3 0.50 8 Nanjundapuram SR 12 2.00 9 Sowripalayam SR 14 5.00 (Staghing Height – 8m) 10 Varadharajapuram SR 11 10.00 (Staghing Height – 8m) 11 Uppilipalayam SR 11 10.00 (Dilapted Condition) 12 Bharathi Park GLSR 34 10.00 13 Bharathi Park GLSR 34 10.00 (Dilapted Condition) 14 Gandhi Park GLSR 51 10.00 15 SIHS Colony Sump 4 3.00

3. Distribution System

 Mainly of PVC, PSC & CI pipes with 1122 Kms pipe length

 Many new layouts and uncovered areas without water supply is about 253 Kms

 Major portion of corporation (namely North, East, South & Central) are Panchayats earlier except that of the West Zones served by Siruvani which was the old town. The water supplied at the rate of 70 lpcd earlier as per the norms of Town Panchayats. So, the pipe sizes are capable of supplying 70 lpcd only as compared to the required rate of 135 lpcd

 Many D’System are supplied by more than one or two service reservoirs simulatneosuly due to inadequate pressure, if supplied via single service reservoir

 Almost all the wards faces Inadequate Water Supply & inadequate pressure, Frequent burst & breakdowns in pipes, Contamination due to mixing of sewage, Blockage of

53 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

pipes, Water received only when pumped by hand pumps from the HSC, Presence of Old pipes with frequent leaks, Limited hours of supply, etc.,

 Sample leak register in ward 71 (one of the biggest ward served by Ramakrsihnapuram MSR) shows a reported leaks of 140 numbers within a short period of 3 months. With such leaking condition, that too with the intermittent type of supply, there was objection by the general public to ascertain UFW in D’System. Hence, sample studies were made to ascertain UFW, Pressure in the D’System. The details of the same are enclosed in Volume I (b) Annexure Number – A4 part of this DPR

 Piece meal extension of pipelines then and there to meet immediate requirement without meeting the hydraulic requirement of the D’System.

4. House Service Connections

 Mainly of regular water meters for individual houses and public stands for slums and other public areas.

 Meter readings are taken manually with the help of meter readers. There are nearly 20 number of meter readers for the North Zone alone captured meter readings in more than 25 meter reading register

 Meter readings are not taken in a uniform manner i.e., not taken every month / bimonthly basis, rather 3 or 4 readings were taken every year.

 Only Single water meter connection is given for Apartments / residential complex or buildings with more tenants, inspite of many occupants.

 1,31,239 Meters are in working condition and 11,812 Meters are not functioning.

As mentioned above, the water supply components starting from Master Service Reservoirs namely feeder mains, service reservoirs, D’system, House Service Connections are much in dilapted condition (as compared to bulk water) to fulfill the water supply requirement as per the project benchmarks. Hence a detailed analysis and revamping of the above said components is required and hence form the need of the assignment.

54 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Before After S.No Propsoed Indicator Implementation Implementation 1 Coverage of Water Supply Connection 95.37 % 100 % Per capita availability of Water at 70 – 125 lpcd 135 lpcd 2 consumer end (Once in 4 to 5 Days) (Daily) 3 Extent of metering of water connections 87.49 % 100 % 4 Extent of Non – revenue water 23 % 15 % Intermittent (Once in 2 to 5 Continuity of water supply 3 Days a week , 2 to 3 24 X 7 Hours a Day) Efficiency in redressal of customer 6 80 % 80 % complaints Adequacy of treatment & disinfection 7 Nil 100 % and quality of water supplied 8 Cost recovery in water supply services 89 % 100 % Efficiency in collection of water supply 9 70 – 80 % 90 % related charges Number of persons receiving less than 70 10 Nil 0 % lpcd

2.8 Technical Solutions towards Project Benchmarks

2.8.1 Methodology for 24 X 7 WSS

The prerequisites for the design and monitoring of 24 X 7 system are discussed below

(i) Back drop drawing

The satellite pan sharpened digitized image of 0.6 resolutions for the city can be digitized to a vector image in a DXF format and this image could be used as a backdrop drawing for hydraulic model, but the same is not available with the Coimbatore Corporation. Hence the survey drawing obtained from Corporation dually vetted is used as the base drawing for the preparation of existing network.

(ii) Operational Zones

The town has to be rezoned into various operational zones for designing of 24 X 7 WSS. The existing storage and the additional storage systems for the design demand are worked out and rezoning was done, identifying new reservoirs required in additional to the existing reservoirs. Each SR with its serving area will form an operational zone and the water from the MSR is gravitated to each SR. The

55 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM operational zones are demarcated for the consideration of the critical study of storage of SR and consumer withdrawal pattern. The operational zones are the strategic blocs for transformation into 24 X 7 system. Accordingly 63 operational zones are now proposed.

(iii) District Metering Areas

Each operational zone is divided into smaller sub zones called District Metering Area (DMA) for efficient monitoring of water supply service. Every DMA will be hydraulically discrete (isolated) from adjoining areas. The water will be supplied to each DMA through single inlet with meters. All the house service connections within the sub zones will be metered. The flow and pressure at critical locations will be continuously measured and logged which will give indication of extent of leakages as well as flow rates. The leakages identified are to be rectified and located irreparable pipes, valves etc. are to be replaced. Control measures will be adopted to ensure equitable flow irrespective of ground flow variation. In the present context, 101 DMAs are proposed for the 63 operational zones.

(iv) Hydraulic Model

Hydraulic modelling of the existing water distribution network is a critical part of designing 24 X 7 system. It gives commanding knowledge of the water infrastructure and helps to take informal decisions. Modelling is defined as a mathematical description of a real world system, infrastructure of entire city water supply including those of all pipe lines and the valves plotted on the backdrop drawing based on topo survey. The process is called active topology. Hydraulic modeeling of all the 100 DMAs are prepared and analysed.

(v) Simulation of DMAS

Vast data sheets are needed to be created and handled. Large numbers of model runs are required and also recording of their results. It may not be possible to create various data files to edit input data in each data file. Working with many data files or editing frequently with single data file will be confusing, inefficient and susceptible for human errors. Hence three alternate data sets are to be kept with single model data file. a. Action topology – Physical representation of the system and its properties b. Demand – Various types of demands of network c. Operation – Valves, their settings and operations.

The hydraulic network of scenario of each DMA is then solved and the results checked. Study is focused on the leakage rates by comparing model results with actual results in the field. According to model design operational zones and DMAs are made hydraulically discrete at site of work. As per

56 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM hydraulic analysis carried out by the hydraulic model, new pipe lines will be laid replacing inadequate size or defective old pipes will be replaced. Using DMA, NRW for each DMA will be worked out and could be tackled, one by one based on priority.

(vi) Bulk Water Meters and Consumer Water Meters

Bulk water meters will be installed to measure the quantum of water that is entered into a DMA and 100 % HSCs are proposed to be installed with consumer water meters to measure the quantity of water consumed as aforesaid.

2.8.2 Instrumentation for 24 X 7 WSS

 Sluice / Scour Valves

Sluice valve is used for flow control, isolation of sub zones and for carrying out O & M works. There are DI sluice valves of class PN- 10 which are available in market with resilient seated, without valve pits, buried underground with telescopic extension rod with soft sealing without gland, flat gate bottom with lining conformed to IS 14846/BS 5163/DIN 3202. These hi-tech valves are more suitable to places where very high traffic load is experienced and carrying out O & M practise will be cause for disturbance to the traffic, these buried type application are suitable. These type of valves are proposed for the entire Coimbatore corporation.

Importance of Air Management in 24/7 Water Supply Distribution Systems

The first step towards 24 X 7 water supply is strengthening of existing distribution system both in terms of flow capacity as well as minimizing the leakage potential. One of the main reasons for excessive leakage in 24 X 7 water supply system is the uncontrolled entry and exit of air into the distribution system that damages the pipe joints.

Most water distribution systems in the country are old and are in bad shape in terms of leak prevention. A major portion of the leakage in distribution systems occurs at pipe joints when the pipe systems are prone to excessive leakage. Therefore understanding the air-water interaction and proper management of air in distribution systems is at most important for minimizing the leakage in water

57 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM supply systems.

Air may enter the pipe distribution network from supply source even in continuous water supply systems. If the treated water enters the clear water tank in the form of a plunging jet the resulting turbulence can entrain air that gets transported into the distribution system. Dissolved air present in high pressure water may be released when the water passes through low pressure regions. Air enters the distribution network from the delivery points (typically connections to underground sumps or elevated household storage tanks) if the pipelines gets drained partially or completely. Air may also enter through the leaky joints at high elevation points along the pipelines.

Air that has entered the distribution system gets vented out during the subsequent filling cycle of supply of water to consumers. If the flow velocity is not sufficient, air bubbles get accumulated at the pipe crown, horizontal bends, and/or high elevation points. This may get compressed when the water pressure reaches those locations. Pockets of compressed air may choke the flow reducing the delivery efficiency of pipelines. Sudden movement of choked air may generate undue stresses on pipe joints which in turn may create or exacerbate the existing leaks.

Proper venting of entrained air is very important for efficient operation and longer life of water supply systems. Appropriately sized and judicially placed good quality air valves will vent the air out of the system without creating choking conditions and the associated pipe joint problems. Air may continue to create choking conditions while larger orifice sizes than the desired values may lead to air valve slam and associated surge pressure which may damage the pipe joints eventually leading to leaky joints. Inefficient air valves may lead to more problems than not having them. For example improper float design may lead to premature closure of the air valve resulting in small but potentially dangerous (elsewhere in the distribution system) pressure surges. The use of larger air valve may lead to frequent pipe breaks from the location of the improperly sized air valve. Premature closure also results in trapping of compressed air which leads to choking of water flow. Proper venting of air from the distribution system especially near the consumer meter is essential to avoid over charging the consumer. Compressed air pocket passing through a water meter makes the meter record much higher flow quantities than water. Such overcharging may eventually lead to mistrust and eventual misuse of water meters. While proper venting of air is important during the filling and delivery cycle of water to the consumers, letting air into the system during the draining cycle (after the flow has ceased entering the distribution system) is also very important to prevent low pressures in the system which can potentially be more detrimental on the pipe joints. Most pipe joints can withstand fairly positive pressures but may not be able to withstand negative pressures. Such joints are highly susceptible for leakage when they are subject to high negative pressures. In continuous water supply systems, low pressures in the distribution system occur only during abnormal operation such as power failure

58 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM conditions resulting in simultaneous tripping of all operating pumps. The high elevation points, if not ventilated properly will also develop cracks at the joints and eventually contribute to excessive leakage.

Proper ventilation of the distribution system by way of appropriately sized air release can prevent unwanted leaks at pipe joints. The importance of good quality air valves are contributing in preventing premature closure and the associated secondary surge pressures which may eventually damage the pipe points thereby increasing the leakage potential. Improper sizing and placement of air valves may cause more damages to the system than not having them.

Suitable types of air valves at appropriate locations are suggested for effective Air management in the distribution system. Duojet airvalves proposed in the estimate is highlighted below.

 Kinetic / Duojet Air Valves (Single Cylinder Type)

The Kinetic or Duojet type single chamber DI air valve with SS internal parts are used for effective release of air from the pipe line system. These are improved models of automatic air valves available in the market compared to the conventional air valves. These are proposed for improved performance to monitor the air management in water supply distribution system. As these Air Venting Valve valves have single cylinder operation they are resistant to tamper proof.

2. Introduction of Technically Upgraded AMR Water Meters

 Bulk Water Meter conformed to ISO 4064

The high accuracy, low loss of head, SS/glass encapsulated and guaranteed against fogging registers, adoptable to 2G/3G technologies, bulk water meter PN 1.6 class of size 50 mm to 300 mm with tungsten carbide impeller shaft tips & bearings, polyester coated CI/Bronze body bulk water meter with +/- 2 to 5% accuracy conformed to ISO 4064/AWWA/EEC. These meters are proposed at the start of every Distribution System to measure the quantum of water that is being fed into the D’system.

 Consumer Water Meters ISO 4064 instead of IS 779

59 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

The multijet magnetic consumer water meter of size 15 mm to 50 mm PN 1.0 with corrosion proof copper alloy body, SS / encapsulated magnetically driven sealed registers guaranteed against fogging with +/- 2 to 5% accuracy etc conformed to ISO4064/AWWA/C708/SI63 are proposed at Consumer end for Domestic & Commercial tapping of water in the Distribution System. They are capable of operating with Automatic Meter Reading System (which will be dealt in the coming session), tamper proof, etc.,

 Data Logger for Flow & Pressure Measurement

A battery operated data logger for pressure and flow recording for every 10 minutes or at any desired time interval is proposed to have a real data base of the hydraulics in the Distribution System.

Handset for Mobile Meter Reading

The hand held solution for mobile meter reading is an option to have the Hand Set rated at IP 65 for dust and water proof, using Easyroute, Mobileroute software to optimise radio reading, uploading and downloading routes from/to the host computer programming of radiometer modules, graphical display of data facility etc to improve the efficiency of the meter reading system.

Fig. No. 9 - Mobile Meter Reader  Walk by Meter Reading

The walk by meter reading is a data collection system with automatic reception of metering data directly to hand held computers (palm pilot). This proposed option is for meter reading with all recognized mini terminals, transmission of commands directly to the meter, remote meter on/off etc to simplify the meter reading process.

60 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Fig. No. 10 - Walk by Meter Reading

 Radio Module for Remote Water Reader

The proposed Radio Module for Remote Water Reader is another technology option available in the market compatible with water meters from DN 15 to 500 mm to store records spanning 13 months, even work in congested areas.

2.8.3 Disinfection Process for 24 X 7 WSS The disinfection proposed is Gas Chlorination system at MSR.

2.8.4 24 X 7 Customer Care Centre

The 24 X 7 customer care centre with billing and collection software including complaints redressal module and monitoring is proposed.

2.8.5 Introduction of Volumetric Rational Tariff

The tariff plays a vital role in revenue generation of any water supply system to make it self sustainable. A suitable methodology for designing volumetric tariff will be proposed after approval of the final cost estimate considering subsidiary for poor category.

2.9 Physical Infrastructure Components

2.9.1 Formulation of Design Basis

(i) Design Parameters

The design parameters for designing water supply systems was adopted as per CPHEEO manual on Water Supply and also considering TWAD (Tamil Nadu Water Supply & Drainage Board) norms as mentioned in the given Table No. 2.4

61 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.4 – Hydraulic Design Parameters Sl.No Parameters Data 1 Ultimate Design period (Approved) 30 yrs (2014 to 2044) 2 Intermediate period (Approved) 15 yrs (2014 to 2029) Pumping hours for intermediate and 3 22 hours ultimate demand 4 Per capita supply 135 lpcd Intermediate Commercial & Industrial 5 9.98 mld demand Ultimate Industrial and Commercial 6 17.25 mld demand UFW in the system (Maximum) 15% 7 a) Feeder or Conveying Mains 5 % b) Distribution System 10 % Materials for pipes for Distribution 90 to 315mm – HDPE PN6 PE100 8 System > 350 mm – DI S/S K7 pipes < 200 mm – HDPE Materials for pipes for Feeder Mains 200 – 600 mm – DI S/S K7 Pipes (As per TWAD Norms) > 600 mm – MS Pipes 9 HDPE –PN 6-PE 100 for Gravity Mains HDPE – PN 8- PE 100 for Pumping Mains a) Class of Pipes DI K7 S/S for Gravity & Pumping Mains MS (With minimum of 8mm thickness for Gravity Mains) Proposed Pipes  140 for DI & MS Pipes and 10 Hazer William’s factor “C” for pipes 145 for HDPE Pipes Existing Pipes  100 for CI Pipes Service Reservoirs a) Storage Capacity 1/3 rd of Intermediate Demand Rounded Off to nearest One Lakh Litres as per b) Capacities 11 TWAD Norms for Urban water supply schemes c) No. of Compartments Generally 2 for more than 10 LL d) Staghing Height 12 to 15 m e) Shape Circular Distribution System 12 m for Proposed SR’s (and also for existing a) Minimum Residual Head at Ferrule SR’s wherever possible) and Point 7 m for Existing SR’s 12 b) Pressure Variation within the Zones Within 5 m 3.00 for Population < 50,000 c) Peak Factor 2.5 for Population from 50,000 – 2,00,000 2 for Population > 2,00,000 Detention Time of 30 & 60 minutes as per 13 Underground Sumps TWAD Norms

(ii) Population Projection

The population projection was done by the following methods namely, 1. Arithmetical Increase Method

62 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2. Incremental Increase Method 3. Geometric Increase Method 4. Line of Best Fit Method 5. Graphical Method

The calculations are enclosed in Volume I (b), Annexure Number – A1 part of this DPR. The population projected by Geometric Incremental Method gives much higher value and also much suitable for growing towns and cities having vast scope of expansion like Coimbatore as recommended by CPHEEO under Clause 2.2.7 on Population Forecast. The same projection method is also approved under JNNURM Pillur Scheme – II for Coimbatore Corporation in the Terms of Reference and also in City Development Plan of Coimbatore Corporation. So, the Graphical Incremental Method for population projection is adopted unanimously for this project. The projected population is also listed below in Table No. 2.5. Table No. 2.5 - Projected Population under Geometric Incremental Method Sl No Year Project Stage Population (Nos) 1 2011 Census Population 10,61,447 2 2014 Base Year 11,10,933 3 2029 Intermediate Stage 13,95,199 4 2044 Ultimate Stage 17,52,203

(iii) CDP Observations for Demand Projection

CDP recommends ward density pattern, which is the ratio of ward spread area and the ward population. Accordingly the wards are categorized as low dense, medium dense, high dense, very high dense and saturated wards. Population projection factor was considered primarily based on the CDP (City Development Plan) recommendations and also as per the growth rate of the city, expected new layouts, vertical growth, urban poor, slums, land use pattern, residential and commercial properties and industries, etc against each individual 72 wards (old) during the site visit made. The low dense wards are given a maximum growth factor of 2.00 followed by medium dense wards of 1.70, high dense wards of 1.50, very high dense wards of 1.30 and saturated wards of 1.20.

The ward wise population density with the summary of density pattern, population projection factor and the ward wise population projection are listed in Table No. 2.6, 2.7, 2.8 & 2.9 respectively. The ward boundary of the entire city was explicated in Dwg No – 10/1811150/WSS/WIN/003, Volume VI part of this DPR.

63 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.6 – Ward Wise Population Density 2011 Density 2001 Ward Density Pattern as Population Type (As Ward Population Road Area per 2011 Projected (Projected from per 2011 No. (Census Length (Sq.Km) Population 2001 Projected Population) (m) (Persons / Sqkm) Population) Population) (1) (2) (3) (4) (5) (6) = (3) / (5) (7) 1 13218 15116 31071 2.05 7378 Low 2 13663 15624 25160 1.67 9345 Low 3 13534 15477 47192 4.69 3300 Low 4 18398 21023 63728 4.95 4249 Low 5 14201 16237 19144 1.23 13157 Medium 6 14632 16729 36797 4.57 3663 Low 7 14663 16764 26203 4.72 3552 Low 8 11037 12629 14746 0.80 15775 High 9 17753 20287 27333 1.73 11707 Medium 10 16768 19164 37960 1.86 10307 Medium 11 14889 17022 21187 1.32 12865 Medium 12 12326 14099 26181 4.81 2930 Low 13 15097 17259 24871 4.65 3715 Low 14 11935 13653 28506 2.98 4582 Low 15 13505 15444 19397 1.15 13409 Medium 16 21525 24589 28913 2.06 11948 Medium 17 18294 20904 42378 2.86 7305 Low 18 13126 15011 12262 0.67 22270 High 19 15451 17663 12878 0.85 20901 High 20 8602 9853 9960 0.53 18618 High 21 12746 14578 12120 0.64 22908 High 22 14213 16251 10274 0.51 31714 Very High 23 15320 17513 15093 0.72 24367 High 24 11542 13205 11286 0.47 27981 Very High 25 9532 10913 22333 2.01 5437 Low 26 14810 16932 16537 2.07 8179 Low 27 11495 13152 12751 1.02 12850 Medium 28 10035 11487 12386 1.30 8866 Low 29 9997 11444 9042 0.40 28784 Very High 30 9243 10584 6363 0.29 36343 Very High 31 8886 10177 11274 0.68 15033 High

64 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2011 Density 2001 Ward Density Pattern as Population Type (As Ward Population Road Area per 2011 Projected (Projected from per 2011 No. (Census Length (Sq.Km) Population 2001 Projected Population) (m) (Persons / Sqkm) Population) Population) 32 9290 10637 6246 0.36 29452 Very High 33 11825 13528 8056 0.77 17525 High 34 15954 18236 21154 1.49 12206 Medium 35 6155 7063 4229 0.36 19634 High 36 11022 12612 5178 0.51 24830 High 37 7081 8119 5526 0.24 34304 Very High 38 6781 7777 5922 0.34 22591 High 39 6349 7284 3258 0.34 21297 High 40 10911 12486 2205 0.14 88072 Saturated 41 8072 9249 4214 0.16 57452 Saturated 42 12336 14111 13185 1.28 11066 Medium 43 12086 13826 5375 0.22 61669 Saturated 44 14057 16073 6212 0.34 47303 Saturated 45 8724 9992 6199 0.27 36860 Very High 46 10019 11469 2096 0.10 118448 Saturated 47 10042 11495 5038 0.17 66171 Saturated 48 9771 11186 2817 0.12 90986 Saturated 49 10613 12146 14821 1.01 12079 Medium 50 5677 6518 8452 0.47 13824 Medium 51 9156 10485 8069 0.60 17363 High 52 12451 14242 11055 0.63 22614 High 53 13461 15393 7262 0.33 47041 Saturated 54 26056 29755 28722 4.09 7270 Low 55 12901 14755 31946 4.42 3338 Low 56 15425 17633 19776 1.02 17221 High 57 14466 16539 17709 4.38 3778 Low 58 11146 12754 17025 2.22 5740 Low 59 13868 15858 22564 1.71 9295 Low 60 13282 15189 11891 1.25 12132 Medium 61 15085 17245 16473 1.01 17127 High 62 10821 12383 18470 0.78 15910 High 63 10490 12006 8185 0.41 28983 Very High 64 9810 11230 9158 0.53 20991 High 65 11640 13317 39126 2.57 5185 Low 66 21799 24901 26543 1.47 16914 High 67 12863 14712 8370 0.31 48134 Saturated

65 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.7 - Summary of Density Pattern S.No Density Pattern Range (Persons / Sq.km) No. of wards 1 Low Dense Wards 0 - 10000 20 2 Medium Dense Wards 10000 - 15000 13 3 High Dense Wards 15000 - 25000 20 4 Very High Dense Wards 25000 - 45000 10 5 Saturated Wards > 45000 9 Total 72

Table No. 2.8 – Population Projection Factor

No of Wards Density Type Projection Factor 23 Low Dense Wards 2.00 15 Medium Dense Wards 1.70 16 High Dense Wards 1.50 12 Very High Dense Wards 1.30 6 Saturated Wards 1.20

66 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Density Pattern in Coimbatore

Very High Dense Saturated Wards Wards 9 Nos 10 Nos

Low Dense Wards 20 Nos

High Dense Wards 20 Nos Medium Dense Wards 13 Nos

Fig. No. 11 - Density Pattern of Wards in Coimbatore

Table No. 2.9 - Ward Wise Population Projection

Density Additional Settlements Projected Ward Spread Area Pattern as Density (As per Site Visit) Population per 2011 Type Population Ward CDP for the S.No Projected (As per 2011 Projection No Observations Year 2044 Population Projected Factor (Ultimate (Persons / Population) Vrtl Slum Sqm Sqkm New Layouts Stage) Sqkm) Exp Population

Future High 1 1 2048784 2.05 7378 Low 338 Sites - 1005 2.00 30292 Growth Future High 2 2 1671939 1.67 9345 Low 177 Sites - 2128 2.00 31307 Growth 349 Sites (High Future High 3 3 4690145 4.69 3300 Low - 761 2.00 31013 as per CDP) Growth 715 Sites (High Future High 4 4 4947559 4.95 4249 Low - 1409 2.00 42105 as per CDP) Growth 202 Sites (High Normal 5 5 1234088 1.23 13157 Medium - 1458 1.70 27663 as per CDP) Growth 638 Sites (High Future High 6 6 4566838 4.57 3663 Low - 1135 2.00 33517 as per CDP) Growth 139 Sites (High Future High 7 7 4719701 4.72 3552 Low - 535 2.00 33587 as per CDP) Growth 8 8 800585 0.80 15775 High 156 Sites - - 1.50 19003 Normal 9 9 1732966 1.73 11707 Medium 636 Sites - 1475 1.70 34548 Growth Normal 10 10 1859421 1.86 10307 Medium 497 Sites - 1740 1.70 32639 Growth Normal 11 11 1323093 1.32 12865 Medium 163 Sites - 1920 1.70 28996 Growth

Future High 12 12 4811424 4.81 2930 Low 667 Sites - 3335 2.00 28258 Growth Future High 13 13 4646179 4.65 3715 Low 804 Sites - 19810 2.00 34577 Growth Future High 14 14 2979776 2.98 4582 Low - 675 2.00 27366 Growth Normal 15 15 1151701 1.15 13409 Medium 124 Sites - 800 1.70 26313 Growth Normal 16 16 2057897 2.06 11948 Medium 198 Sites - 630 1.70 41860 Growth Future High 17 17 2861657 2.86 7305 Low 774 Sites - 650 2.00 41868 Growth 18 18 674072 0.67 22270 High 94 Sites - 1465 - 1.50 22576 19 19 845048 0.85 20901 High 90 Sites - 1844 - 1.50 26553 20 20 529214 0.53 18618 High 22 Sites - 885 - 1.50 14839 21 21 636378 0.64 22908 High 25 Sites - 1865 - 1.50 21926 22 22 512417 0.51 31714 Very High 57 Sites - 560 - 1.30 21185 23 23 718724 0.72 24367 High 55 Sites - 580 - 1.50 26329 24 24 471930 0.47 27981 Very High 64 Sites - - - 1.30 17226 Future High 25 25 2007309 2.01 5437 Low 26 Sites - 5830 2.00 21886 Growth 26 26 2070181 2.07 8179 Low 36 Sites - 1525 Future High 2.00 33923

Growth Normal 27 27 1023494 1.02 12850 Medium 53 Sites - 160 1.70 22417 Growth Future High - 28 28 1295593 1.30 8866 Low 16 Sites High - 2.00 23033 Growth 29 29 397572 0.40 28784 Very High 8 Sites - 1000 - 1.30 14936 30 30 291218 0.29 36343 Very High 6 Sites High 1850 - 1.30 13818 31 31 676948 0.68 15033 High 12 Sites High - - 1.50 15324 32 32 361180 0.36 29452 Very High 21 Sites High 600 - 1.30 13888 33 33 771938 0.77 17525 High 33 Sites High 2142 - 1.50 20351 Normal 34 34 1494050 1.49 12206 Medium 38 Sites - 575 1.70 31061 Growth 35 35 359715 0.36 19634 High 11 Sites - 3693 - 1.50 10653 36 36 507942 0.51 24830 High 7 Sites - - - 1.50 18978 37 37 236663 0.24 34304 Very High 11 Sites - 2000 - 1.30 10613 38 38 344228 0.34 22591 High 4 Sites - 75 - 1.50 11724 39 39 342012 0.34 21297 High - - - 1.50 10985 40 40 141768 0.14 88072 Saturated 3 Sites - - - 1.20 15042 41 41 160978 0.16 57452 Saturated 4 Sites - - - 1.20 11158 Normal 42 42 1275092 1.28 11066 Medium 380 Sites - 400 1.70 24047 Growth

43 43 224191 0.22 61669 Saturated 26 Sites - 4505 - 1.20 16650 44 44 339790 0.34 47303 Saturated 4 Sites - - - 1.20 19347 45 45 271080 0.27 36860 Very High 8 Sites - - - 1.30 13049 46 46 96825 0.10 118448 Saturated 3 Sites - - - 1.20 13822 47 47 173715 0.17 66171 Saturated 5 Sites - - - 1.20 13853 48 48 122941 0.12 90986 Saturated 2 Sites - - - 1.20 13482 Normal 49 49 1005588 1.01 12079 Medium 39 Sites - - 1.70 20707 Growth Normal 50 50 471471 0.47 13824 Medium 26 Sites - - 1.70 11139 Growth 51 51 603842 0.60 17363 High 24 Sites - 315 - 1.50 15786 52 52 629791 0.63 22614 High 82 Sites - 885 - 1.50 21422 53 53 327236 0.33 47041 Saturated 16 Sites - - - 1.20 18531 Future High 54 54 4093116 4.09 7270 Low 696 Sites High 14160 2.00 59569 Growth 658 Sites (High Future High 55 55 4420063 4.42 3338 Low - 3775 2.00 29569 as per CDP) Growth 56 56 1023920 1.02 17221 High 354 Sites - 795 1.50 26509 Future High 57 57 4378226 4.38 3778 Low 40 Sites - 2675 2.00 33138 Growth 58 58 2222099 2.22 5740 Low 184 Sites (High - 1285 Future High 2.00 25567

as per CDP) Growth 566 Sites (High Future High 59 59 1706017 1.71 9295 Low - 605 2.00 31774 as per CDP) Growth Normal 60 60 1251960 1.25 12132 Medium 87 Sites High 1000 1.70 25881 Growth 61 61 1006906 1.01 17127 High 118 Sites High 1250 - 1.50 25927 62 62 778318 0.78 15910 High 221 Sites High 1750 - 1.50 18634 63 63 414240 0.41 28983 Very High 110 Sites High 1000 - 1.30 15667 64 64 534997 0.53 20991 High 14 Sites High 7100 - 1.50 16905 Future High 65 65 2568525 2.57 5185 Low 522 Sites High 710 2.00 26693 Growth 66 66 1472190 1.47 16914 High 750 Sites - 4225 - 1.50 37411 67 67 305637 0.31 48134 Saturated 99 Sites - - - 1.20 17713 68 68 173771 0.17 37448 Very High 26 Sites - - - 1.30 8519 69 69 832388 0.83 28707 Very High 159 Sites - - - 1.30 31123 Normal 70 70 1698114 1.70 10873 Medium 249 Sites - - 1.70 31446 Growth 71 71 573249 0.57 22073 High 87 Sites - 440 1.50 19039 Future High 72 72 5646754 5.65 6542 Low 2454 Sites High 1510 2.00 73946 Growth

CBE 24 X 7 - Wardwsie Population Projection (Ward - 1 to 20)

45000

40000

35000 2044 Population

30000 2029 Population

25000 2014 Population

20000

Population (Nos) Population 15000

10000

5000

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Ward Number

Fig. No. 12 - Ward Wise Population Projection (From 1 to 20 - Old Ward Numbers)

CBE 24 X 7 - Wardwsie Population Projection (Ward - 21 to 40)

35000

30000

25000 2044 Population

20000 2029 Population

15000 2014 Population

(Nos) Population 10000

5000

0 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Ward Number

Fig. No. 13 - Ward Wise Population Projection (From 21 to 40 – Old Ward Numbers)

CBE 24 X 7 - Wardwsie Population Projection (Ward - 41 to 60)

60000

50000 2044 Population

2029 Population 40000 2014 Population

30000

Population (Nos) Population 20000

10000

0 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Ward Number

Fig. No. 14- Ward Wise Population Projection (From 41 to 60 – Old Ward Numbers)

CBE 24 X 7 - Wardwsie Population Projection (Ward - 61 to 72)

80000

70000

60000

50000 2044 Population

2029 Population 40000 2014 Population 30000

(Nos) Population 20000

10000

0 61 62 63 64 65 66 67 68 69 70 71 72

Ward Number

Fig. No. 15 - Ward Wise Population Projection (From 61 to 72 – Old Ward Numbers)

Table No. 2.10 shows the Ward wise ultimate projected population and their water demand. Table No. 2.10 - Ward Wise Demand Calculation

(1) (2) (3) (4) (5) = (4) X (3) (6) = (5) X 135 1 1 15116 2.00 30292 4089417 2 2 15624 2.00 31307 4226419 3 3 15477 2.00 31013 4186704 4 4 21023 2.00 42105 5684184 5 5 16237 1.70 27663 3734444 6 6 16729 2.00 33517 4524745 7 7 16764 2.00 33587 4534289 8 8 12629 1.50 19003 2565463 9 9 20287 1.70 34548 4663966 10 10 19164 1.70 32639 4406201 11 11 17022 1.70 28996 3914487 12 12 14099 2.00 28258 3814797 13 13 17259 2.00 34577 4667905 14 14 13653 2.00 27366 3694419 15 15 15444 1.70 26313 3552309 16 16 24589 1.70 41860 5651059 17 17 20904 2.00 41868 5652165 18 18 15011 1.50 22576 3047819 19 19 17663 1.50 26553 3584667 20 20 9853 1.50 14839 2003215

Projected Ward wise Population for 2011 Population Projected Population for the 2044 Population Demand S.No Ward Number (With 2001 Ward Wise Projection Factor Year 2044 (Ultimate Stage) (lpcd) Approved Population) 21 21 14578 1.50 21926 2960076 22 22 16251 1.30 21185 2860034 23 23 17513 1.50 26329 3554419 24 24 13205 1.30 17226 2325526 25 25 10913 2.00 21886 2954608 26 26 16932 2.00 33923 4579546 27 27 13152 1.70 22417 3026313 28 28 11487 2.00 23033 3109466 29 29 11444 1.30 14936 2016347 30 30 10584 1.30 13818 1865460 31 31 10177 1.50 15324 2068792 32 32 10637 1.30 13888 1874866 33 33 13528 1.50 20351 2747414 34 34 18236 1.70 31061 4193186 35 35 7063 1.50 10653 1438197 36 36 12612 1.50 18978 2562000 37 37 8119 1.30 10613 1432810 38 38 7777 1.50 11724 1582742 39 39 7284 1.50 10985 1482992 40 40 12486 1.20 15042 2030695 41 41 9249 1.20 11158 1506269 42 42 14111 1.70 24047 3246393 43 43 13826 1.20 16650 2247743 44 44 16073 1.20 19347 2611830

Projected Ward wise Population for 2011 Population Projected Population for the 2044 Population Demand S.No Ward Number (With 2001 Ward Wise Projection Factor Year 2044 (Ultimate Stage) (lpcd) Approved Population) 45 45 9992 1.30 13049 1761600 46 46 11469 1.20 13822 1865923 47 47 11495 1.20 13853 1870171 48 48 11186 1.20 13482 1820112 49 49 12146 1.70 20707 2795502 50 50 6518 1.70 11139 1503803 51 51 10485 1.50 15786 2131135 52 52 14242 1.50 21422 2891959 53 53 15393 1.20 18531 2501736 54 54 29755 2.00 59569 8041852 55 55 14755 2.00 29569 3991822 56 56 17633 1.50 26509 3578663 57 57 16539 2.00 33138 4473639 58 58 12754 2.00 25567 3451510 59 59 15858 2.00 31774 4289532 60 60 15189 1.70 25881 3493952 61 61 17245 1.50 25927 3500157 62 62 12383 1.50 18634 2515588 63 63 12006 1.30 15667 2115004 64 64 11230 1.50 16905 2282146 65 65 13317 2.00 26693 3603598 66 66 24901 1.50 37411 5050436 67 67 14712 1.20 17713 2391272 68 68 6507 1.30 8519 1150047

Projected Ward wise Population for 2011 Population Projected Population for the 2044 Population Demand S.No Ward Number (With 2001 Ward Wise Projection Factor Year 2044 (Ultimate Stage) (lpcd) Approved Population) 69 69 23895 1.30 31123 4201609 70 70 18463 1.70 31446 4245262 71 71 12653 1.50 19039 2570312 72 72 36943 2.00 73946 9982665 TOTAL 1061447 Nos 1752203 Nos 172472348 lpcd

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(iv) Topographical Survey

The topographic levels along the roads furnished by the Corporation is verified and adopted for the design.

(v) Soil Investigation

The soil analysis database made under the proposed Under Ground Sewerage Scheme, received from Corporation is validated and used for water supply project for estimation and as well as to suggest bedding for pipe line to suit soil condition if required. The soil tests to arrive at SBC as per relevant BIS for proposed new service reservoir sites have also been done. Under the scope of the DPR, Safe Bearing Capacity was ascertained from the corporation and random sampling of SBC tests were carried out on the following Proposed Service reservoirs at the rate of one SR for each Zone which is listed in Table No. 2.11 for the construction of 29 SRs in Coimbatore.

Table No. 2.11 – SBC Test on Proposed SR Site (One SR / Zone)

S.No Service Reservoir Location Zone Capacity (LL)

1 Nehru Street North 18.00

2 Housing Unit West 18.00

3 Sivaram Nagar South 19.00

4 Kothari Nagar East / Demo Zone II 4.00

5 VOC Park East / Demo Zone I 18.00

There are a few incidents come to light where soil settlement phenomenon happened within the Corporation area itself resulting in the failure of civil structures, settlement of houses, loss of materials, etc. Keeping in consideration of the above real time factors, necessary safety measures are adopted in structural design of all the Water Retaining Structures in this proposal. Accordingly, suitable provisions are also in built in Cost Estimate for all the Water Retaining Structures under this project in order to conduct and confirm the actual SBC Values, etc at the Proposed construction sites and also to adopt the right foundation design based on suitable SBC values before taking up the work for execution so as to serve its full design life time fruitfully.

The Corporation has to take necessary measures to ensure that all required site tests are conducted, test results are analyzed and confirmed as per Technical Specification provided confirmed to IS Standards for all the Water Retaining Structures, including the SBC Tests already conducted for the

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM above said Service Reservoirs before execution of the project. However, for the ease implementation of the project, foundation is designed for the above said Service Reservoirs with the ascertained SBC value from the field tests conducted which is annexed in Volume I (b), Annexure Number – A9 part of this DPR.

The details of site selected for validation are listed in Table No. 2.12, 2.13 & 2.14 repectively.

Location : Trial pit at Thanner pandal road Ward No : 3 Date : 24.02.09

Table No. 2.12 – Soil Trial Pit at Thanner Pandal Road Details received from Corporation Validation by Fichtner Sl.No. Depth Soil Specimen Nature 1 0 to 1.00 mtr Clay soil Verified 2 1.00 to 2.00 mtr Loose Clay soil Verified

Location : Trial pit at Nava India Road (Avinasi road junction) Ward No : 14 Date : 25.02.09

Table No. 2.13 – Soil Trial Pit at Nava India Road Details received from Corporation Validation by Fichtner Sl.No. Depth Soil Specimen Nature 1 0 to 1.00 mtr Red soil Hard soil 2 1.00 to 2.00 mtr Red soil Verified 3 2.00 to 3.00 mtr Red soil Verified

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Location : Trial pit at South Street, Avarampalayam

Ward No : 17

Date : 25.02.09

Table No. 2.14 – Soil Trial Pit at Avarampalayam Details received from Corporation Validation by Fichtner Sl.No. Depth Soil Specimen Nature 1 0 to 1.00 mtr Clay soil Verified 2 1.00 to 2.00 mtr Clay soil Verified

Additionally the SBC value of the soil was determined by drilling 100mm diameter bore hole using Rotary Calyx Mechanically Operated Drilling Equipment, to a depth of 10m below the local ground level or upto the hard stratum with the “N” value over 100 or 34 blows for 10 cm penetration

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM whichever is encountered earlier. Additionally SPT test, laboratory test on soil samples collected classification of soil, type and depth of foundation, etc., was deteremined.

(vi) Zoning of Distribution System

The capacity and serving area of a reservoir is primarily based on the population and its demand. The contour of the area to be served is one of the prime considerations for demarcation of SR zones in the project area. The contour plan prepared is considered for rezoning, which depends on the capacity of the existing & proposed service reservoirs, terrain of the area, distance, location, vertical expansion, new layouts, cluster to be served, etc. and the most economical design is arrived at. While rezoning, necessity for providing additional service reservoir to meet additional requirement is analyzed and provided. Zoning of the area in the proposed project area under jurisdiction of CCC, is carried out. This has been performed based on the ultimate stage (year 2044) population. Each zone is provided with an SR and further divided into multiple District Metering Areas (DMAs) for SRs of capacity more than 10 LL. Following are the important criteria adopted in zoning of the project area for the design of the distribution system.

(a) In any classified zone, the difference in the maximum and minimum elevations shall not be more than 10m.

(b) The minimum residual head available shall be atleast 12 m (as specified in the Manual on Water Supply of CPHEEO) for all proposed service reservoirs and a minimum of 7 m based on the constraints imposed by the staging height of existing SRs.

(vii) Distribution System Network

Distribution System Network for each service reservoir is prepared taking into account of the factors like length of distribution system, maximum serving area and physical constraints. Further, suitable coverage of Slum settlements, spatial distribution of the settlements, type of service, etc., are also considered for suitable rezoning.

(viii) Consumption Peak Factor

There is variation in water consumption during the day and the night and also varies with seasons. There is no clearly defined relationship between average and peak flow currently applied to all towns.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

The CPHEEO Manual on Water Supply and Treatment recommends the following peak factors for various design population.

Population less than 50000 : 3.0 Population range of 50000 to 200,000 : 2.5 Population above 200,000 : 2.0 Hence, the relevant peak factor is adopted accordingly for each zone.

(ix) Minimum Residual Head

The CPHEEO Manual prescribes a minimum residual head of 12 m at ferrule points for two storey building and the same is adopted for this project. However, as most of the existing SRs are old, based on the existing staging height, a minimum residual head of 7 m is maintained for such zones

(x) Utility of Existing Pipes

The pressure distribution system with minimum 12 m pressure is proposed. The existing PVC Pipes may not be suitable due to the factors of susceptibility to impact loading, vulnerable for damages by other service agencies, temperature & non resistivity. The use of AC Pipes is also not in practice due to heavy weight and hence the existing AC pipes also require replacement. The CI pipe laid long ago served out their life and requires replacement. The piece meal extensions made using pipes less than 100 mm dia to meet immediate requirement temporarily also requires replacement.

(xi) Network Analysis for Looped Distribution System

Network mapping and modelling for detailed engineering design is the core activity that determines the realisation of desired objectives under this assignment. A basic hydraulic model of the network comprising of primary, secondary and tertiary mains is analysed, using an internationally recognized network modelling software package, namely WATERGEMS & LOOP. Based on the model simulations, the capacity of the network, identified engineering requirements for hydraulic zoning, district metering, improving the flow characteristics, rehabilitation, replacement and expansion to meet the demand projections so as to ensure a continuous pressurized water supply service is carried out. Network drawings analysis results will be given to Coimbatore Corporation for its usage and validation in future.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(xii) Elimination of Public Fountains

There is a percentage share of distribution of water through public fountains to serve the consumers who are not having House Service Connections in their property. As 24 X 7 continuous water supply system is proposed, the possibility of meeting each and every household property owner to avail HSC will be emphasised by convincing the consumers with rational tariff structure and implementing slum policy of government for urban poor. At present, there are 3412 nos of public fountains in the Coimbatore Corporation area and suggestions will be made to reduce / eliminate the public fountains to the extent possible through suitable IEC activities by the Corporation

(xiii) Pipe Material

Selection of Pipe Material

CPHEEO has laid down guidelines on the techno-economic comparison and selection the pipeline material. The present selection is made based on these guidelines. Hazen William’s C value of 100 for Existing CI pipes, 140 for DI and MS Pipes considered for design. DI pipes have an inherent high tensile strength. Thus, high factor of safety to the pipeline against accidental waterhammer/ impact / traffic loading on pipeline, accidental drop at site during laying / loading / unloading, etc. DI pipes have a distinct advantage, namely, they come with internal cement mortar lining that is done at factory, along with the external bitumen painting over a zinc coat. In an area like Coimbatore, which is in the vicinity for high traffic, congestion, high rainfall, high temperature, etc it is better to provide a pipeline which has inherent corrosion resistant and other featured properties. DI pipes protected internally with centrifugally applied cement mortar lining are best suited to resist against corrosion. Considering these factors, spigot and socket spun DI pipes lined internally with cement mortar and externally with bitumen painting over zinc coat of Class K7 is selected as the pipe material for feeder mains. The pipes shall be HDPE PN6-PE100 for size less than 200 mm for Gravity mains and HDPEPN8-PE100 for pumping mains, DI K7 for pipes ranging from 200 – 600 mm and MS (Minimum of 8 mm thickness) for pipes greater than 600 mm are considered.

Hazen William’s Roughness Coefficient Hazen William’s Roughness Coefficient ‘C’ for transmission / feeder mains in the system is adopted as per CPHEEO norms. Adequacy of the existing mains was verified by proper selection of C value based on the pipe material and age as specified in the CPHEEO manual.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(xiv) Trench Size for Pipe Laying

Trenches for laying feeder mains and distribution mains in the system have been estimated based on the standard guidelines specified in the CPHEEO Manual. A minimum pipe cover of 1.0 m from the ground to the pipe crown shall be maintained for proper load distribution and pipeline safety considerations. A minimum working space of 300 mm on either side of the pipe is considered as working space for proper excavation.

(xv) Service Reservoirs

Based on the zoning of the distribution system, CCC is divided into four parts namely East, West, North and South with a total number of 63 service reservoirs having 101 Sub Zones. The storage capacity of each SR has been worked out for the intermediate stage based on 24 hours pumping and 24 hours supply, as per the CPHEEO guidelines. The capacities of SRs proposed are as follows:

 4 Lakh Litres with 15 metres of Staging Height

 7 Lakh Litres with 12 & 15 metres of Staging Height

 9 Lakh Litres with 12 & 15 metres of Staging Height

 10 Lakh Litres with 15 metres of Staging Height

 11 Lakh Litres with 15 metres of Staging Height

 12 Lakh Litres with 15 metres of Staging Height

 13 Lakh Litres with 12 metres of Staging Height

 16 Lakh Litres with 15 metres of Staging Height

 18 Lakh Litres with 12 & 15 metres of Staging Height

 19 Lakh Litres with 15 metres of Staging Height

 20 Lakh Litres with 12 & 15 metres of Staging Height

The details of the proposed SRs – 29 Nos in the 101 Sub Zones with improratnt land marks covered under each SR are presented in Volume – I (b), Annexure Number – A11 part of this DPR.

(xvi) House Service Connections

In order to cater to the population in the intermediate stage viz., for the project area where augmentation proposals are made, the total number of HSCs are worked out for the Base year 2014 population and comes around 2.00 Lakhs Connections (Approximately). The present (2010) House Service Connections are procured from the corporation and found to be 1,43,051 Nos. The same has

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM been adopted as base for the calculation and envisaged that additional 50,000 new connections would be encountered, hence accordingly 1.5 Lkhs Connections has been taken in the DPR. Provision for fixing new water meters are also made in the estimates.

As recommended by CPHEEO, New Delhi, 75,000 Nos of Water meters are provided with AMR and the remaining meters shall be retained as they are in working condition. Provision was also made that 90% of total meters shall be for 15 mm Domestic Connection and 10% of total meters shall be for 25 mm Non-domestic Connection.

The details on HSC provided is listed below in Table No. 2.15 and the details of connection with the Existing or New Connection was shown in Dwg No.10/1811150/WSS/WI/145 & 146, Volume VI part of this DPR.

Table No. 2.15 – Number of House Service Connections (Base Year 2014)

Service Connections Sl 2014 Pop No of HSC Zone No (Nos) (Nos) Domestic - Non Domestic 90% & PF - 10% 1 North Zone 2,66,732 36,015 32,414 3,602 2 South Zone 1,99,736 26,969 24,272 2,697 3 West Zone 3,19,611 43,154 38,839 4,315 4 East / Demo Zone - I 1,22,988 16,606 14,945 1,661 5 East / Demo Zone – II 2,01,866 27,256 24,530 2,726 Total 11,10,933 1,50,000 1,35,000 15,000

The cost for House Service Connections is worked out in Volume III – Distribution System & Special Component part of this report and comes around Rs 324.50 Crores (As per Schedule of Rates 2016 – 2017)

2.9.2 Field Investigations Done The field studies were made for collection of additional data, measurement of flow, pressure measurement and water sampling and testing etc., for design considerations. The details of the particulars collected Zone wise are listed in Table No. 2.16.

Table No. 2.16 - Additional Data Collection Made Zone Numbers S.No Description East West North South Data Collection Made Ward Numbers

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

1 Street Name Updation 2 SR Serving Area 3 Salient Features of Wards 4 Ward Boundary 5 Valve Details 4,5,6,7 48,49,50 1,2,3, 36,37,38 6 Low Pressure Area 7 Leaks & Blocks 8,9,10 51 52,53 17,65 66 41 42,43 8 Existing WS Details 9 Unmarked Pipelines & New Roads 11,14,15, 55,56,57 67,68,69 44,45,46 10 Potential SRs Site Particulars 16,19,20 58,59,34 70 ,71,72 47 54,12 11 Slum Details 12 Special Buildings 21,22, 23, 35,60,61 18,29,30 13,25,27 13 Bulk Water Supply Data 14 New Layouts / Vertical Expansions 24,26 62,63,64 31, 32, 33 39,40,28 Field Investigation Done 1 Flow Measurement 2 Pressure Measurement 3 Soil Investigation 4 Water Sampling and Testing The bulk water requirement collected from various institutions, schools, commercial centers, hotels, etc., are listed in Volume I (b), Annexure Number – A3 part of this DPR.

1. Flow Measurement

The flow measurements were made on both Siruvani and Pillur Water supply feeder mains using portable ULTRASONIC FLOWMETERS – “FLEXIM” of German make for measuring the flow and velocity in the piping system. The values are measured and stored for every minute in the Instrument and these values are furnished separately in Voulme I (b), Annexure Number – A4 part of this DPR and the flow measurement photographs taken at site were also annexed as photo gallery in Annexure Number – A7, Volume I (b) part of this DPR.

2. Water Sampling and Testing

The water samples were collected randomly from Public Fountains in both Pillur and Siurvani water supply system. The samples were tested in the Public Health Department lab, Coimbatore for ascertaining the water quality on the Physical, Chemical and Bacteriological parameters. The copies of the test reports are given in Table No. 2.17 & 2.18 and the photographs are enclosed in Volume I (b), Annexure Number – A7, part of this DPR.

Table No. 2.17 - Water Sampling and Testing Sample Number M291 M292 M293

Source Location PF at Nalamaraj Lane PF at RG Street PF at Rayappa

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Sample Number M291 M292 M293

Nagar Ward Number 38 41 18 Source Siruvani Supply Siruvani Supply Pillur Supply Date of sampling 24.02.2009 24.02.2009 24.02.2009 PARAMETERS PHYSICAL EXAMINATION Appearance Slight Yellow (SP) Slight Yellow (SP) Colourless (SP) Odour None None None Turbidity NTU 3 2 2 CHEMICAL EXAMINATION Total Dissolved Solids 40 85 120 Carbonate Hardness (As Caco3) 16 17 50 Non Carbonate Hardness (As 4 2 0 Caco3) Total Hardness (Caco3) 20 19 50 Calcium Hardness (As Caco3) 11 7 32 Magnesium Hardness (As Caco3) 9 12 18 Chloride (As Cl) 7 7 28 Ammonium Nitrogen (as N) 0.01 0.02 0 Albuminoid Nitrogen (As N) - - - Oxygen absorbed (Tidys test in 4 0.12 0.16 0.08 hrs) Nitrate Nitrogen (As No2 mg/l) 0.2 0.2 0.2 Phenolpthalin Alkalinity (As 0 0 0 Caco3) Methly Orange Alkalinity (As 16 17 50 Caco3) Fluoride (as F) 0.1 0.1 0.1 pH value 7.1 6.8 7.2 Total Iron (As Fe) 0.5 0.4 0.1 Manganese (As Mn) 0 0 0 QUALITATIVE TESTS Nitrite Nitrogen NIL NIL NIL Sulphate Trace Trace Trace Phosphate Trace Trace Trace Toxic Substance - - - Electrical Conductivity (Reciprocal megohms per Cm at 53 46 215 20 C) Amorphous Microscopical Examination Amorphous Matter Amorphous Matter Matter

Table No. 2.18 - Water Sampling and Testing

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Sample Number M294 M295 Source Location PF at Jothi Nagar PF at Rajiv Nagar Ward Number 19 21 Source Pillur Pillur Date of sampling 25.02.2009 25.02.2009 PARAMETERS PHYSICAL EXAMINATION Appearance Colourless (SP) Slight Yellow Odour None None Turbidity NTU 1 2 CHEMICAL EXAMINATION Total Dissolved solids 65 30 Carbonate Hardness (As Caco3) 33 14 Non Carbonate Hardness (As Caco3) 1 5 Total Hardness (As Caco3) 34 19 Calcium Hardness (As Caco3) 20 7 Magnesium Hardness (As Caco3) 14 12 Chloride (As Cl) 6 6 Ammonium Nitrogen (as N) 0 0.01 Albuminoid Nitrogen (As N) - - Oxygen absorbed (Tidys test in 4 hrs) 0.04 0.12 Nitrate Nitrogen (As No2 mg/l) 0.2 0.2 Phenolpthalin Alkalinity (As Caco3) 0 0 Methly Orange Alkalinity (As Caco3) 33 14 Fluoride (as F) 0.1 0.1 pH value 6.9 6.9 Total Iron (As Fe) 0.05 0.2 Manganese (As Mn) 0 0 QUALITATIVE TESTS Nitrite Nitrogen NIL NIL Sulphate Trace Trace Phosphate Trace Trace Toxic Substance - - Electrical Conductivity (Reciprocal megohms per Cm 93 50 at 20 C) Microscopical Examination Amorphous Matter Amorphous Matter BACTERIOLOGICAL EXAMINATION Plate Count per ml on agar at 37 deg C – 24 Hrs 70 0 MPN of Coliform bacteria / 100 ml 240 0 Nature of Coliform bacteria isolated Irregular VI - The result of the sample collected from the Pit Tap at Jothi Nagar (Sample Number - M294), Jayasimmapuram of Ward No 19 is not satisfactory for bacteriological quality. The pit taps will be eliminated on providing continuous pressured system with a minimum residual head of 12m / 7m in respective zones.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

2.9.3 Detailed Engineering Design - Feeder Main System As the entire distribution system and corresponding SRs are designed to meet the ultimate demand in the year 2044, it is imperative that the feeder main system connecting all the SRs with the master service reservoir (MSR) is also designed to cater to the ultimate demand. Design parameters considered in the design of feeder mains is narrated below:

Design Parameters: The coefficient of roughness ‘C’ adopted in the design of feeder mains for the existing pipes and proposed new pipes are listed in Table No. 2.19.

Table No. 2.19 - “C” Value used for Hydraulic Design

"C" Value for Pipes in Feeder Mains S.No Pipe Type System Existing System Proposed System 1 PVC Siruvani - - 2 HDPE Siruvani - 145 3 DI & MS Siruvani - 140 4 CI Siruvani 100 - 5 AC Siruvani - - 6 PSC Siruvani - - 7 PVC Pillur - - 8 HDPE Pillur - 145 9 DI & MS Pillur - 140 10 CI Pillur 100 - 11 AC Pillur - - 12 PSC Pillur - -

 The feeder / gravity mains are designed with 22 hours of flow.  With a view to minimize the cost for pipe material, old CI pipes satisfying the hydraulic criteria are proposed for retention, removing all AC,PSC and PVC pipes. The details of pipe sizes adopted are listed below in Table No. 2.20

Table No. 2.20 - Pipe Sizes Proposed in Feeder Mains Diameter in mm Pipe material & S.No. (ID – for DI & MS Type Pressure Rating and OD for HDPE) 1 HDPE – PE 100 PN 6 < 200 Gravity System 2 HDPE – PE 100 PN 8 < 200 Pumping System 3 DI-K7 S/S 200 - 600 Gravity / Pumping System 4 MS PIPES > 600 Gravity / Pumping System .

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

 In order to ensure designed flow to all SRs simultaneously, flow control valves are proposed at the inlet of some SRs where the residual head available is extremely high (Say > 7m pressure) and to stablize a uniform flow within the feeder mains.  As some SRs cannot be fed under gravity from MSR due to prevailing higher elevations, ground level sumps are proposed nearby with required pumpsets, for feeding them.  Ground level sumps proposed are designed for a retention time of 30 minutes (of the intermediate stage requirement) for system which operates only during emergency contingencies and for a retention time of 60 minutes (of the intermediate stage requirement) for system which operates under routine / normal operation.

(i) Existing Feeder Main System Details of existing feeder main arrangement and the Service reservoirs being fed under both Pillur and Siruvani schemes are given below in Table No. 2.21 & Table No.2.22 Table No. 2.21 – Existing Feeder Mains under Pillur System

S.No From To Diameter Material Length Feeding Reservoir 1 NP-1 NP-2 1000 PSC 835 - 2 NP-2 NP-3 1000 PSC 1753 - 3 NP-3 NP-4 1000 PSC 178 - 4 NP-4 NP-5 1000 PSC 638 - 5 NP-5 NP-6 800 PSC 1543 - 6 NP-6 NP-7 800 PSC 932 - 7 NP-7 NP-8 750 AC 689 - 8 NP-8 NP-9 500 AC 296 - 9 NP-9 NP-10 450 AC 954 - 10 NP-10 NP-11 450 CI 1545 - 11 NP-11 NP-12 400 CI 1063 Puliyakulam 12 NP-12 NP-13 900 PVC 459 - 13 NP-10 NP-14 450 CI 1145 Town Hall 14 NP-2 NP-15 350 CI 1462 VV Nagar 15 NP-15 NP-16 450 CI 1581 Police Quarters 16 NP-16 NP-17 450 CI 921 Gandhi Ma Nagar 17 NP-2 NP-17 200 AC 5671 - 18 NP-17 NP-18 450 CI 5096 - 19 NP-18 NP-19 350 CI 948 - 20 NP-19 NP-20 350 CI 1240 - 21 NP-20 NP-21 350 CI 326 Singanallur 22 NP-21 - 200 AC - - 23 NP-22 NP-23 350 CI 1404 Anna Nagar

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.No From To Diameter Material Length Feeding Reservoir 24 NP-23 NP-24 300 CI 1509 - 25 NP-24 NP-25 150 AC 771 SIHS Colony 26 NP-24 NP-26 300 CI 366 Nethajipuram 27 NP-18 NP-27 300 CI 2146 KK Nagar 28 NP-4 NP-28 500 CI 1507 Avarampalayam 29 NP-28 NP-29 500 CI 320 - 30 NP-28 NP-30 500 CI 144 - 31 NP-30 NP-31 500 CI 101 Kamadehnu Nagar 32 NP-31 NP-32 500 CI 512 - 33 NP-32 NP-33 250 AC 1655 Peelamedu 34 NP-33 NP-34 450 AC 1185 - 35 NP-34 NP-35 450 PSC 1356 Sowripalayam 36 NP-35 NP-36 350 PSC 2251 - 37 NP-36 NP-37 350 PSC 419 GV Residency 38 NP-36 NP-19 250 CI 1298 Varadarajapuram 39 NP-6 NP-38 750 CI 666 Siddhapudur 40 NP-39 NP-40 200 AC 2829 Maniyakarampalayam 41 NP-40 NP-41 450 CI 1620 - 42 NP-41 NP-42 450 CI 220 Kamarajapuram 43 NP-41 NP-43 450 CI 60 - 44 NP-43 NP-44 450 CI 209 - 45 NP-44 NP-3 450 CI 530 -

Table No. 2.22 – Existing Feeder Mains under Siruvani System

S.No From To Diameter Material Length Feeding Reservoir 1 NS-1 NS-2 500 CI 1119 2 NS-2 NS-3 450 CI 1668 3 NS-3 NS-4 600 CI 1210 4 NS-4 NS-5 250 CI 1083 Cheran Nagar 5 NS-4 NS-6 600 CI 2233 Jayaram Nagar 6 NS-3 NS-7 450 CI 1216 Gandhi Park, DB Road 7 NS-7 NS-8 600 CI 1432 Vysia Street 8 NS-1 NS-9 450 CI 1548 RS Puram, 9 NS-1 NS-10 600 CI 1366 Sanganur Chinthamani 10 NS-1 NS-11 600 CI 1183 11 NS-11 NS-12 500 CI 1426 12 NS-12 NS-13 500 CI 234 13 NS-13 NS-14 500 CI 290 RG Nagar 14 NS-13 NS-15 500 CI 1966 Rayappa Nagar 15 NS-12 NS-16 250 AC 1554 Jai Nagar 16 NS-1 NS-17 250 CI 554

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

S.No From To Diameter Material Length Feeding Reservoir 17 NS-1 NS-18 500 CI 1651 18 NS-18 NS-19 250 CI 522 Tatabad 19 NS-18 NS-20 500 CI 1998 VOC Park 20 NS-20 NS-21 150 CI 2560

The details of the existing feeder main system are presented in Dwg No. 10/1811150/WSS/WIN/005, Volume VI part of this DPR.

(ii) Existing Problems in Feeder Main Systems 1. No Bulk water meter is installed either in MSRs or in SRs. This resulted in ineffective monitoring of flow among MSRs to SRs and designed quantity is not received at various SRs.

2. Direct tapping in Feeder Mains between MSR to SRs was observed. This resulted in reduction of residual pressure available at the feeder mains to feed the SR’s due to which SRs are not receiving designed flow. Many SRs like Jai Nagar SR, Sanganur Chintamani SR, etc., are not used due to insufficient flow in the reservoir.

3. Interlinking of Distribution System under both schemes like Pillur and Siruvani was observed near the Sungam areas, to overcome the shortage problem occurring during the Siruvani schemes.

4. Also distribution network were linked with two SRs at a time to feed remote areas, the area of higher elevation as observed in the Southern Part of Coimbatore in Ward 54, which is supplied by both Gandhi Park SR and also by Bharathi Park GLSR. This will greatly affect the network hydraulics by causing higher flow than the designed quantity into the system and affects the efficiency of the system like the pipe joints getting weaker (cement solvent as in the present case), prone to more leakage, etc.,

5. Direct Feeding arrangement to SRs from rising mains namely in Revathi Layout SR, Venkatapuram SR, Madatur SR, Ishwarya Nagar SR, etc in West Zone was also observed in between Siruvani WTP to Siruvani MSR. These arrangements affect the regular water supply schedule of Siruvani fed areas, especially during the shortage period.

6. There is no proper feeder main arrangement with the dependable source in the existing system to overcome the shortage in Siruvani Supply.

7. Due to insuffiecient pressure in the feeder main to feed the SR’s, many places pumpsets are used to directly pump into the Distribution system. Also due to frequent power failure or power shutdown, pumps are operated using Diesel or in case of non availability of such arrangments, the supply to the zone is affected considerably.

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(iii) Proposed Feeder Main System 1. The existing feeder main alignment was retained as such, so as to avoid any additional / New Railway Crossings, National Highway Crossings, Nallas, Water Streams etc., which may delay the laying of pipes during execution time. The entire alignment was revamped for the ultimate demand in 2044 and the existing CI pipes suitable for hydraulic designs are retained. Additionally new feeder mains are proposed to the newly proposed SRs in both the systems.

2. Isolation of Pillur and Siruvani System are made separately, with Pillur System having it supply from Pillur MSR and Siruvani system from Siruvani MSR respectively. The railway line running parallel to the Mettupalayam Highway starting from ward 64 at Northern end and ending at Ward 13 near Trichy Pallaghat road forms the boundary for Siruvani and Pillur Systems

3. The Pillur feeder main was further sub divided into two primary stretches, linking a group of Service reservoirs from Existing and Proposed MSR at Ramakrishnapuram separately.

4. In the proposed Feeder mains system, both Pillur & Siruvani MSRs are used only as balancing reservoirs and the existing distribution system are delinked from the system.

5. Special apputenences like Sluice Valves with actuators connected to SCADA system are proposed at the Inlet of each SR, Pitless sluice valves along the branch mains for flow regulation and control during O & M. DI Scour Valves are proposed closure to Nallah or water stream along the alignment for scouring. Duojet cylindrical air valves are proposed in the higher / elevated gorund levels in between each stretches. Flow regulating valves are proposed where the residual head at the SR Inlet was very high (> 7 m). Bulk water meters with flow measurement are proposed at the outlet of each SR connecting to each District Metering Area (DMA’s), to quantify the flow to distribution system.

6. In case of Direct Feeding SR’s – As an emergency contingency for the Direct Feeding SRs under Siruvani system during drought periods, a separate pumping arrangement has been made from the proposed sump of 10 LL capacity with the retention time of 60 minutes at the existing Sanganur Chinthamani SR area, extending upto Revathy Layout along the pheriperal boundary of Coimbatore Corporation connecting the other 5 direct feeding SRs. The size of the pumping mains is arrived based on the economical analysis taking in to account the cost of pipes, pumpsets and energy charges.

 Alternate options like  Connecting Six SRs from Siruvani MSR separately by laying a separate line was also considered. But due to high elevation difference

Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(ie) the SRs being located in the higher elevation it cannot be fed by gravity system.  Connecting Six SRs to a proposed single Service Reservoir, acting like a balancing reservoir at higher elevation (Probably in Ward 61) to feed the six reservoirs is also considered. But due to the nonavailability of apt site and also additional cost is incurred for construction of balancing reservoir, so this alternative is also ruled out Details of the propsed feeder main system and their longitudinal section for a chainage of every 30 m is shown in Dwg No. 10/1811150/WSS/WIN/007, Volume VI part of this DPR.

(iv) Proposed Feeder Main Alignment

The total length of feeder mains coming under Pillur, Siruvani & Pillur Siruvani MSR comes around 105 Kms. Pillur comprises of 64 Kms of main under Gravity and 10 Kms of main under Pumping. Siruvani comprises of 15 Kms of main under Gravity and 7.50 Kms of main under Pumping. Pillur Siruvani MSR Interlinking comprises of 8.50 kms of main under gravity.

Details of Service Reservoirs under each system and also the proposed feeder main system being fed under Pillur and Siruvani system are listed in Table No. 2.23 to 2.29 and shown in Dwg No. 10/1811150/WSS/WIN/ 007 to 032, Volume VI part of this DPR.

Table No. 2.23 - Pillur Feeder Main I From Proposed MSR at Ramakrishnapuram to Proposed SR at Bharathi Nagar (By Gravity)

)

(

)

) ) )

m m m

Name

retch

( ( (

(M)

Pipe Pipe

(

LWL

Outlet

Height

Length

Staging

G.L (

ate Flow

Node No

Ultimate Material

Capacity

Flow (

Remarks

Depth Of

Diameter

Level (

Intermedi

MWL

Water

MS 1 - 2 1500 742.91 948.17 1250 - 2 428.13 ------(10mm THK) MS 2 - 3 1000 733.45 936.3 1250 - 3 422.5 ------(10mm THK) MS 3 - 4 700 665.12 850.48 1200 - 4 417.86 ------(10mm THK) MS 4 - 5 2300 632.81 809.9 900 - 5 411.41 ------(8mm THK) Tapping for 5 - IT 1000 34.72 34.72 ------ITPark MS 5 - 6 500 598.09 775.18 700 - 6 410.51 ------(7mm THK) MS 6 - 7 275 560.72 724.55 700 - 7 407.33 ------(7mm THK) MS 7 - 8 123 523.88 678.29 700 - 8 406.47 ------(7mm THK) MS 8 - 9 1423 474.43 616.19 700 - 9 396.07 ------(7mm THK) MS 9 - 10 564 441.52 574.86 700 - 10 393.99 ------(7mm THK) 10 - 11 1377 136.33 177.46 500 DI K7 S/S - 11 388.41 ------11 - 12 1532 85.36 113.45 500 DI K7 S/S - 12 387.38 ------12 - 13 956 47.8 66.28 400 DI K7 S/S - 13 399.33 ------Bharathi 13 - 14 225 39.81 56.26 400 DI K7 S/S - 14 400.61 15.00 415.61 3.50 419.11 421.61 11.00 Nagar SR (Proposed) PILLUR - BRANCHES FOR FEEDER MAIN-I

Table No. 2.23 - Pillur Feeder Main I From Proposed MSR at Ramakrishnapuram to Proposed SR at Bharathi Nagar (By Gravity)

)

(

)

) ) )

m m m

Name

retch

( ( (

(M)

Pipe Pipe

(

LWL

Outlet

Height

Length

Staging

G.L (

ate Flow

Node No

Ultimate Material

Capacity

Flow (

Remarks

Depth Of

Diameter

Level (

Intermedi

MWL

Water Gandhi 2 - 15 100 9.46 11.88 200 DI K7 S/S - 15 428.13 10.60 438.73 3.00 441.73 442.73 3.00 Managar SR (Exting) VKR Nagar 3 - 16 947 68.33 85.82 500 DI K7 S/S - 16 422.50 15.00 437.50 3.70 441.00 442.20 8.00 SR (Proposed) Karuppiya 4 - 17 370 32.31 40.58 350 DI K7 S/S - 17 417.70 15.00 432.70 3.10 435.80 438.30 10.00 Goundar SR (Proposed) EXIST 6 - 18 1116 37.37 50.83 400 CI 18 405.80 ------ING Hudco 18 - 19 853 37.37 50.63 250 DI K7 S/S - 19 401.42 15.00 416.42 3.50 419.92 422.42 10 Colony SR (Proposed) DJ Nagar SR 7 - 20 51 36.84 46.26 200 DI K7 S/S - 20 406.29 14.00 420.29 3.50 423.79 426.29 10.00 (Existing) Rajalakshmi 8 - 21 276 49.45 62.10 250 DI K7 S/S - 21 406.26 12.00 418.26 3.20 421.462 423.962 13.00 Nagar SR (Proposed) 9 - 22 1330 32.91 41.33 300 DI K7 S/S - 22 396.28 ------KK Nagar SR 22 - 23 955 32.91 41.33 300 DI K7 S/S - 23 399.03 13.00 412.03 3.50 415.53 418.03 10.00 (Existing) MS 10 - 24 378 305.19 397.39 700 - 24 390.87 ------(7mm THK) MS 24 - 25 507 173.89 232.5 500 - 25 388.07 ------(7mm THK) MS 25 - 26 236 173.89 232.5 400 - 26 387.32 ------(7mm THK)

Table No. 2.23 - Pillur Feeder Main I From Proposed MSR at Ramakrishnapuram to Proposed SR at Bharathi Nagar (By Gravity)

)

(

)

) ) )

m m m

Name

retch

( ( (

(M)

Pipe Pipe

(

LWL

Outlet

Height

Length

Staging

G.L (

ate Flow

Node No

Ultimate Material

Capacity

Flow (

Remarks

Depth Of

Diameter

Level (

Intermedi

MWL

Water MS 26 - 27 497 80.37 103.86 300 - 27 387.12 ------(7mm THK) MS 27 - 28 981 55.16 72.2 250 - 28 381.77 ------(7mm THK) MS 28 - 29 1334 40.58 53.89 250 - 29 379.29 ------(7mm THK) Tagore Nagar MS 29 - 30 771 40.58 53.89 250 - 30 376.94 15.00 391.94 3.50 395.45 397.946 11.00 SR (7mm THK) (Proposed) MS 24 - 31 1298 131.29 164.9 450 - 31 392.61 ------(7mm THK) MS 31 - 32 777 114.88 144.28 450 - 32 393.37 ------(7mm THK) Sri Lakshmi MS 32 - 33 2231 40.63 51.03 450 - 33 400.69 15.00 415.69 3.50 419.19 421.69 11.00 Nagar SR (7mm THK) (Proposed) GV MS 31 - 34 419 16.42 20.62 200 - 34 395.65 14.00 409.65 3.50 413.15 415.65 6.00 Residency SR (7mm THK) (Existing) Annai MS Velankanni 32 - 35 163 74.25 93.25 250 - 35 394.69 15.00 410.59 4.00 414.59 417.09 20.00 (7mm THK) SR (Proposed) MS 26 - 36 650 93.52 128.64 350 - 36 387.97 ------(7mm THK) Thiru Nagar MS 36 - 37 1996 58.19 79.51 300 - 37 393.00 15.00 408.00 3.10 411.10 413.60 16.00 SR (7mm THK) (Proposed)

100

Table No. 2.23 - Pillur Feeder Main I From Proposed MSR at Ramakrishnapuram to Proposed SR at Bharathi Nagar (By Gravity)

)

(

)

) ) )

m m m

Name

retch

( ( (

(M)

Pipe Pipe

(

LWL

Outlet

Height

Length

Staging

G.L (

ate Flow

Node No

Ultimate Material

Capacity

Flow (

Remarks

Depth Of

Diameter

Level (

Intermedi

MWL

Water Uppilipalaya MS 36 - 38 255 35.33 49.13 200 - 38 388.19 15.00 403.19 3.50 406.69 409.19 10.00 m (7mm THK) SR ( Existing) MS Singanallur 27 - 39 326 25.21 31.66 200 - 39 388.90 8.35 397.25 3.00 400.25 402.75 7.00 (7mm THK) SR (Existing) Kothari Nagar MS 28 - 40 375 14.58 18.31 200 - 40 380.69 15.00 395.69 3.50 399.19 401.69 4.00 SR (7mm THK) (Proposed) EXIST Anna Nagar 11 - 41 35 50.97 64.01 250 CI 41 389.11 15.00 404.11 3.50 407.61 410.11 16.00 ING SR (Existing) Nethajipuram 12 - 42 185 37.56 47.17 200 DI K7 S/S - 42 387.49 12.00 399.491 3.65 403.141 405.641 12.00 SR (Existing) SIHS Colony 13 - 43 313 7.98 10.03 200 DI K7 S/S - 43 399.44 12.00 411.44 4.21 415.65 418.15 3.00 (Existing)

101

Table No. 2.24 - Pillur Feeder Main II (From Existing MSR at Ramakrishnapuram to Proposed SR at Lakshmi Nagar Mill Colony (By Gravity)

)

) )

)

m m

)

(

)

(

Name

marks

Pipe Pipe

(

Node

(Lps)

(

Gl (

Stretch

te Flow

Staging

Number

Ultimate Material

Capacity

Depth Of

Diameter (Ext/Pro)

LWL Level (

MWL

Water

Flow (Lps) Height (

Intermedia

Length (

Pipe Outlet MS 1 - 2 901 922.94 1174.89 1400 - 2 421.05 ------(12 mm THICK) MS 2 - 3 1749 922.94 1174.89 1400 - 3 416.88 ------(12 mm THICK) MS 3 - 4 182 865.88 1098.97 1400 - 4 415.93 ------(12 mm THICK) MS 4 - 5 459 777.82 982.55 1400 - 5 415.18 ------(12 mm THICK) MS 5 - 6 1172 777.82 982.55 1400 - 6 417.52 ------(12 mm THICK) MS 6 - 7 524 705.48 891.7 1400 - 7 424.67 ------(12 mm THICK) MS 7 - 8 22 615.28 778.42 1400 - 8 424.65 ------(12 mm THICK) MS 8 - 9 330 560.07 706.92 1400 - 9 427.53 ------(12 mm THICK) MS 9 - 10 429 560.07 706.92 1400 - 10 423.97 ------(12 mm THICK) MS (7 mm 10 - 11 1383 402.59 505.62 700 - 11 414.33 ------THICKNESS) MS (7 mm 11 - 12 740 402.59 505.62 700 - 12 407.48 ------THICKNESS) 12 - 14 1165 201.87 253.53 500 DI K7 S/S - 14 407.55 ------14 - 15 730 131.8 165.52 500 DI K7 S/S - 15 407.09 ------15 - 16 1005 108.49 136.25 400 DI K7 S/S - 16 405.43 ------16 - 17 897 30.92 38.83 300 DI K7 S/S - 17 405.43 ------

102

Table No. 2.24 - Pillur Feeder Main II (From Existing MSR at Ramakrishnapuram to Proposed SR at Lakshmi Nagar Mill Colony (By Gravity)

)

) )

)

m m

)

(

)

(

Name

marks

Pipe Pipe

(

Node

(Lps)

(

Gl (

Stretch

te Flow

Staging

Number

Ultimate Material

Capacity

Depth Of

Diameter (Ext/Pro)

LWL Level (

MWL

Water

Flow (Lps) Height (

Intermedia

Length (

Pipe Outlet Lakshmi Nagar Mill 17 - 18 304 30.92 38.83 300 DI K7 S/S - 18 408.32 12.00 420.32 3.10 423.42 425.92 9.00 Colony SR (PRO) PILLUR - BRANCHES FOR FEEDER MAIN - II 3 - 19 530 57.06 75.92 400 DI K7 S/S - 19 418.17 ------19 - 20 60 17.37 21.82 350 DI K7 S/S - 20 418.64 ------Kamarajapuram SR 20 - 21 240 17.37 21.82 300 DI K7 S/S - 21 419.90 12.60 432.50 3.00 435.50 437.50 6.00 (EXT) Rayappa Nagar SR 19 - 22 206 39.69 54.1 350 DI K7 S/S - 22 418.50 13.90 432.40 3.50 435.90 438.40 15.00 (EXT) EXIS 4 - 23 1493 88.06 116.42 500 CI 23 409.30 ------TING EXIS 23 - 24 144 80.88 106.69 500 CI 24 409.23 ------TING 24 - 25 1405 72.1 94.82 400 DI K7 S/S - 25 408.28 ------25 - 26 426 46.07 62.13 350 DI K7 S/S - 26 412.92 ------26 - 27 234 46.07 62.13 200 DI K7 S/S - 27 413.99 10.50 424.49 4.01 428.50 431.00 15.00 Peelamedu SR (EXT) Avarampalayam SR 23 - 28 320 7.18 9.73 200 DI K7 S/S - 28 409.30 13.30 422.60 2.50 425.10 427.52 2.50 (EXT) Kamadhenu Nagar SR 24 - 29 101 8.77 11.87 200 DI K7 S/S - 29 409.48 11.40 420.88 3.01 423.89 426.39 3.00 (EXT) 25 - 30 713 26.03 32.69 350 DI K7 S/S - 30 411.82 15.00 426.82 3.50 430.32 432.82 7.00 PRP Garden SR (PRO) 6 - 31 1141 72.34 90.85 350 DI K7 S/S - 31 408.86 ------31 - 32 213 72.34 90.85 350 DI K7 S/S - 32 411.86 15.00 426.86 4.00 430.86 433.36 20.00 Ponni Nagar SR (PRO)

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Table No. 2.24 - Pillur Feeder Main II (From Existing MSR at Ramakrishnapuram to Proposed SR at Lakshmi Nagar Mill Colony (By Gravity)

)

) )

)

m m

)

(

)

(

Name

marks

Pipe Pipe

(

Node

(Lps)

(

Gl (

Stretch

te Flow

Staging

Number

Ultimate Material

Capacity

Depth Of

Diameter (Ext/Pro)

LWL Level (

MWL

Water

Flow (Lps) Height (

Intermedia

Length (

Pipe Outlet

7 - 33 1123 90.21 113.29 600 DI K7 S/S - 33 427.14 ------33 - 34 250 90.21 113.29 600 DI K7 S/S - 34 427.14 ------34 - 35 133 90.21 113.29 600 DI K7 S/S - 35 426.00 8.80 434.80 3.20 438.00 440.50 28.00 Tatabad SR (EXT) EXIS 8 - 36 138 55.21 71.5 750 CI 36 425.45 ------TING EXIS 36 - 37 527 55.21 71.5 750 CI 37 423.50 10.10 433.60 3.00 436.60 439.10 20.00 Siddhapudur SR (EXT) TING 10 - 38 245 157.48 201.3 600 DI K7 S/S - 38 423.98 ------38 - 39 42 91.89 115.4 600 DI K7 S/S - 39 423.98 12.80 436.78 3.00 439.78 440.78 27.00 VOC Park-Existing SR VOC Park-Proposed 38 - 40 172 65.59 85.9 600 DI K7 S/S - 40 423.98 12.00 435.98 3.70 439.68 440.68 18.00 SR 12 - 41 1135 200.72 252.09 450 DI K7 S/S - 41 409.83 ------Clock Tower SR 41 - 42 65 42.15 52.93 450 DI K7 S/S - 42 410.15 15.00 425.15 2.90 428.05 430.55 12.00 (PRO) 13 - 43 100 58.05 72.91 450 DI K7 S/S - 43 409.00 13.60 422.60 4.20 426.80 429.30 16.00 TownHall SR (EXT) 47 - 44 593 14.26 17.91 250 DI K7 S/S - 44 402.09 15.00 417.09 3.50 420.59 423.09 4.00 JK Garden SR (PRO) Sivaram Nagar SR 14 - 45 428 70.07 88.01 250 DI K7 S/S - 45 400.53 15.00 415.53 3.90 419.43 421.93 19.00 (EXT) Puliyakulam SR 16 - 46 55 77.57 97.42 250 DI K7 S/S - 46 405.00 10.80 415.80 4.20 420.00 422.50 24.00 (EXT) 13 - 47 1079 71.84 90.23 350 DI K7 S/S - 47 407.31 ------47 - 48 71 57.58 72.32 300 DI K7 S/S - 48 402.09 15.00 417.09 3.10 420.19 422.69 16.00 BSUP SR (PRO) 15 - 49 1438 23.31 29.27 200 DI K7 S/S - 49 394.51 12.00 406.51 3.50 410.01 412.51 7.00 Valliammai Nagar SR

104

Table No. 2.24 - Pillur Feeder Main II (From Existing MSR at Ramakrishnapuram to Proposed SR at Lakshmi Nagar Mill Colony (By Gravity)

)

) )

)

m m

)

(

)

(

Name

marks

Pipe Pipe

(

Node

(Lps)

(

Gl (

Stretch

te Flow

Staging

Number

Ultimate Material

Capacity

Depth Of

Diameter (Ext/Pro)

LWL Level (

MWL

Water

Flow (Lps) Height (

Intermedia

Length (

Pipe Outlet (PRO) 443.36 Ramakrishnapuram SR 1 - 50 30 72.9 91.56 450 DI K7 S/S - 50 428.86 12.00 440.86 4.00 444.86 20.00 * * (PRO) 13 - 51 1360 28.68 36.02 450 DI K7 S/S - 51 409.45 13.60 423.05 3.75 426.80 429.30 9.00 Vysia Street SR (EXT) EXIS 41 - 13 204 158.58 199.16 450 CI 13 412.30 ------TING

* Pipe Outlet at Proposed SR at Ramakrishnapuram is connected below the MWL to get its supply from Existing MSR at Ramakrishnapuram to suit gravity supply & thereby to avoid Sump cum Pumping arrangements 2.28 - Pillur Feeder Main III istirishnapuram to Proposed Sump at Rakatchi Garden (By Gravity)ble No 2.28 - Pillur Feeder Main III - From Existing MSR at Ramakrishnapuram to Proposed Sump at Rakatchi Garden (By Gravity) Table No. 2.25 - Pillur Feeder Main III From Existing MSR at Ramakrishnapuram to Proposed Sump at Rakatchi Garden (By Gravity) Ultimate Depth of Length Intermediate Diameter Pipe Pipe Node GL LWL MWL Capacity Sr Name Stretch Flow Water (m) Flow (Lps) (mm) Material Remarks Number (m) (m) (m) (LL) (Ext/Pro) (Lps) (m) 1 - 2 1540 255.30 322.34 450 DI K7 - 2 423.00 - - - Prop Sump at 2 - 3 831 255.30 322.34 450 DI K7 - 3 423.65 419.65 423.65 4.00 10.00 Rakatchi Garden

105

Table No. 2.26 - Pillur Feeder Main IV Pumping from Proposed Sump at Rakatchi Garden to Existing SR at Jai Nagar (By Pumping)

(

)

(M)

Name

Pipe Pipe

Node

(Mm)

Stretch

Staging Staging

Number

Ultimate Material

Capacity

Remar

Depth Of

Diameter (Ext/Pro)

Level

Flow (Lps) Flow (Lps)

Height (M) Height (M)

Water

Pipe Outlet

Length (M)

Intermediate

1 - 2 1673 180.56 228.47 500 DI K7 S/S - 2 428.79 ------2 - 3 1083 64.24 80.67 400 DI K7 S/S - 3 435.89 ------3 - 4 143 48.05 60.34 350 DI K7 S/S - 4 434.87 ------Jai Nagar 4 - 5 80 48.05 60.34 350 DI K7 S/S - 5 436.30 19.90 456.20 4.00 460.20 462.70 19.90 10.00 SR (Ext) PILLUR - BRANCHES FOR FEEDERMAIN - IV 2 - 6 610 116.32 147.8 350 DI K7 S/S - 6 427.23 ------6 - 7 1717 83.74 106.88 300 DI K7 S/S - 7 421.39 ------Nehru Street 7 - 8 645 66.96 84.1 250 DI K7 S/S - 8 421.16 15.00 436.16 3.70 439.857 442.36 15.00 20.00 SR (Pro) HDPE PN RG Nagar 3 - 11 1950 16.19 20.33 180 - 11 428.34 15.3 443.64 3.00 446.64 449.14 15.30 6.00 8 SR (Ext) PILLUR - SUB BRANCHES FOR FEEDERMAIN – IV Sanganur 6 - 10 1570 32.58 40.92 200 DI K7 S/S - 10 423.54 15.00 438.54 3.10 441.64 44.14 15.00 9.00 Road SR (Prop) HDPE PN Rathinapuri 7 - 9 480 16.78 22.78 180 - 9 423.52 13.70 437.22 3.00 440.02 445.2 13.70 6.00 8 SR (Ext)

* Pipe Outlet at Proposed SR at Bharathi Park is connected below the MWL to get its supply from Bharathi Park MSR to suit gravity supply & thereby to avoid Sump cum Pumping arrangements

106

Table No. 2.27 Siruvani Feeder Main I From Existing MSR at Bharathi Park to Proposed SR at Housing Unit (By Pumping)

Pipe Pipe

(LL)

Node

(Lps)

(Mm)

e Flow

Stretch

Staging

GL (M)

Number

Depth of

Ultimate Material

Capacity

Remarks

Diameter

SR Name

Level (M)

LWL (M)

MWL (M)

Water (M)

Flow (Lps)

Height (M)

Pipe Outlet

Length (M)

Intermediat (EXT/PRO) 1 - 2 2810 402.37 505.33 1000 MS (10 MM THICK) - 2 422.55 ------2 - 8 360 193.51 243.02 900 MS (10 MM THICK) - 8 422.23 ------8 - 9 2120 66.56 83.60 500 DI K7 S/S - 9 422.50 15.00 437.50 3.70 441.20 442.20 18.00 Housing Unit SR (PRO) Siruvani - Branches For Feeder Main - I 2 - 3 905 208.86 262.31 700 MS (7 MM THICK) - 3 421.42 ------3 - 4 300 131.74 165.46 500 DI K7 S/S - 4 422.02 ------4 - 5 215 68.05 85.46 450 CI EXISTING 5 422.40 11.00 433.40 3.00 436.40 438.90 20.00 D.B.Road SR (EXT) 3 - 6 267 77.12 96.85 350 DI K7 S/S - 6 418.45 15.00 433.45 4.00 437.45 439.95 20.00 AKS Nagar SR (PRO) 4 - 7 26 63.69 79.99 450 CI EXISTING 7 421.50 9.75 431.25 3.00 434.25 436.75 19.80 Gandhi Park SR (EXT) 8 - 10 855 126.94 159.43 600 CI EXISTING 10 418.40 ------10 - 11 2233 31.74 39.86 600 CI EXISTING 11 412.50 17.70 430.20 3.00 433.20 435.70 10.00 Jayaram Nagar SR (EXT) 10 - 12 867 95.20 119.57 350 DI K7 S/S - 12 414.70 ------12 - 13 1015 76.95 96.64 300 DI K7 S/S - 13 409.90 15.00 424.90 4.00 428.90 431.40 20.00 Kurinji Garden SR (PRO) 12 - 14 220 18.25 22.92 200 DI K7 S/S - 14 413.50 15.30 428.80 3.00 431.80 434.30 6.00 Cheran nagar SR (EXT) 1 - 22 893 86.02 108.03 600 DI k7 S/S - 22 431.20 ------22 - 23 655 86.02 108.03 600 DI K7 S/S - 23 427.76 12.50 440.26 2.49 442.75 445.25 28.00 R.S.Puram SR (EXT) 1 - 28 82 74.30 93.31 600 DI K7 S/S - 28 432.00 12.00 444.00 4.00 448.00* 446.20 20.00 Bharathi Park SR * (PRO)

107

Table No. 2.28 -Siruvani Feeder Main II From Existing MSR at Bahrathi Park to Proposed Sump at Sanganur Chintamani SR Length Intermediate Ultimate Diameter Pipe Pipe Node GL LWL MWL Staging Capacity Stretch SR Name (m) Flow (Lps) Flow (Lps) (mm) Material Remarks Number (m) (m) (m) Height (m) (LL) MS (8 mm 1 - 2 613 193.20 242.63 800 - 2 435.12 - - - - - Thick) MS (8 mm 2 - 3 665 193.20 242.63 800 - 3 437.32 - - - - - Thick) Sanganur MS (8 mm 3 - 4 88 193.20 242.63 800 - 4 437.40 433.90 437.40 - 10.00 Chintamani - Thick) Proposed Sump

108

Table No. 2.29 - Siruvani Feeder Main - III From Proposed Sump at Sanganur Chintamani SR To Existing SR at Revathi Layout Depth Pipe Ultimate Staging Length Intermediate Diameter Pipe Pipe Node GL LWL of MWL Outlet Capacit Stretch Flow Height SR Name (m) Flow (Lps) (mm) Material Remarks Number (m) (m) Water (m) Level y (LL) (Lps) (m) (m) (m) DI K7 1 - 2 470 116.10 148.15 500 - 2 437.29 ------S/S DI K7 2 - 3 1530 60.82 77.61 350 - 3 434.86 ------S/S DI K7 3 - 4 280 54.78 69.90 350 - 4 433.90 ------S/S DI K7 4 - 5 1970 48.76 62.21 300 - 5 432.65 ------S/S Revathy HDPE 5 - 6 1375 8.66 11.04 160 - 6 435.50 12.20 447.70 3.00 450.70 453.20 3.00 Layout SR PN 8 (Ext) SIRUVANI - BRANCHES FOR FEEDERMAIN - III Boopathy DI K7 2 - 7 125 55.28 70.54 200 - 7 439.00 15.60 454.60 3.00 457.60 460.10 20.00 Layout SR S/S (Ext)

HDPE Koilmedu 3 - 8 775 6.04 7.71 140 - 8 440.00 12.80 452.80 3.00 455.80 458.30 2.00 PN 8 SR (Ext)

Venkatapur HDPE 4 - 9 45 6.02 7.69 110 - 9 440.00 12.00 452.00 3.00 455.00 457.50 2.00 am SR PN 8 (Ext)

HDPE Madatur 5 - 10 250 14.06 17.94 140 - 10 435.00 7.15 442.15 3.00 445.15 447.65 5.00 PN 8 SR (Ext)

Iswarya DI K7 5 - 11 710 26.04 33.23 200 - 11 428.50 12.20 440.70 3.00 443.70 446.20 10.00 Nagar SR S/S (Ext)

109

DI K7 Chintamani 1 - 12 176 39.85 50.85 250 - 12 437.32 15.00 452.52 2.90 455.32 457.72 12.00 S/S SR (Prop)

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.30 - SRs by Direct Feeding before Siruvani MSR Service Reservoir Capacity Remarks on S.No Remarks on Tapping Name (LL) Alignment

1 Koilmedu 2.00 Existing Before Bharathi Park MSR 2 Boopathy Layout 20.00 Existing Before Bharathi Park MSR 3 Venkatapuram 2.00 Existing Before Bharathi Park MSR 4 Revathi Layout 3.00 Existing Before Bharathi Park MSR 5 Madathur 5.00 Existing Before Bharathi Park MSR 6 Iswarya Nagar 10.00 Existing Before Bharathi Park MSR Total Requirement 47.00 LL (Say 4 MLD) NOTE : Since the SRs are currently tapped by gravity before the Bharathi Park MSR, the same system is retained, however during Drought period a separate pumping arrangements are provided to the above said Direct Feeding SR’s from Baharathi Park MSR.

The summary of the feeder main arrangement for both Pillur and Siruvani Scheme and its SR arrangement is listed below 1. The requirement by SRs coming under Proposed MSR at Ramakrishnapuram (ie) Pillur Feeder Main I will be 833 Lps (ie) 72 Mld for the Ultimate Stage and 646 Lps (ie) 56 Mld for the Intermediate Stage. Since the SR’s are designed for 1/3rd of Intermediate Requirement, the capacity of SR capacity designed is for 20 Mld approximately. 2. The requirement by SRs coming under Existing MSR at Ramakrishnapuram (ie) for Pillur Feeder Main II, III & IV will be 1450 Lps (ie) 125 Mld for the Ultimate Stage and 1142 Lps (ie) 99 Mld for the Intermediate Stage. Since the SR’s are designed for 1/3rd of Intermediate Requirement, the capacity of SR capacity designed is 36 Mld approximately. 3. The requirement by SRs coming under Existing MSR at Baharthi Park (ie) for Siruvani Main I, II, III (Including the Direct Feeding SRs) will be 867 Lps (ie) 75 Mld for both Ultimate & Intermediate Stage. Since the SR’s are designed for 1/3rd of Intermediate Requirement, the capacity of SR capacity designed is 22 Mld approximately.

Since the quantum of supply from Siruvani is fixed as 75 mld during the entire design period of 30 years, SRs coming under Siruvani system are carefully delineated such that the total requirement lies well within the 75 Mld ((22 x 3 = 66 Mld) for SR’s coming under Existing MSR at Siruvani + 12 Mld for Direct feeding SR’s fed before Siruvani MSR = 75 Mld as discussed above) and can be fed from Siruvani MSR. Vysial Street SR & Town Hall SR currently fed under Siruvani System was reallocated to Pillur system. The balance ultimate requirement of 215 mld (ie) 289.280 – 75 = 214.28, say 215 mld is reallocated to Pillur MSR.

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Interconnnecting Pillur MSR Outlets for Balance Reservoir Action

The summary of the feeder main arrangement for both Pillur and Siruvani Scheme and the importance of Interconnecting Pillur MSR outlets arrangements is justifified below. 1. The requirement by Pillur Feeder Main I served by Proposed MSR at Ramakrishnapuram for the ultimate stage is calculated to be 876 Lps (ie) 76 Mld approximately. 2. The requirement by Pillur Feeder Main II, III & IV served by Existing MSR at Ramakrishnapuram for the ultimate stage is calculated to be 1523 Lps (ie) 134 Mld approximately with a Bulk Water Storage of 5 Mld totaling to 139 Mld approximately. 3. The requirement by Siruvani Feeder Mains served by Existing MSR at Bharathi Park for the ultimate stage is calculated to be 867 Lps (ie) 75 Mld approximately.

Table No. 2.31 - Summary of flow in Feeder Mains Requirement by Inflow to MSR S.No Description ELSRs (Approx Remarks (MLD) Mld)

1 Pillur – New MSR System 62.50 76 All MSR at 2 Pillur - Old MSR System 62.50 139 Pilllur Scheme Pillur - New MSR after to be 3 89 - Intermediate Stage Interlinked and 4 Siruvani MSR System 63 63 should act as Balancing 5 Siruvani Direct Feeding System 12 12 Reservoir 290 Mld 290 Mld TOTAL (Approx) (Approx)

It is observed that asthe requirement of ELSRs connected to Old MSR and New MSR are higher than the total storage capacity of MSR, an additional of 89 Mld storage capacity is to be constructed after the Intermediate Stage (year) and all the three MSRs should be interconnected and act as collective balancing reservoir for the entire Pillur system and to over come the individual shortage of each MSRs.

The Pillur feeder main outlets say Pillur Feeder Main I (From Proposed MSR at Ramakrishnapuram to Bharthi Nagar), Pillur Feeder Main II (From Existing MSR at Ramakrishnapuram to Lakshmi Mill Colony), Pillur Feeder Main III (From Existing MSR at Ramakrishnapuram to Rakatchi Garden Sump) to be tapped only from the Interconnected pipe outlet of Old & New MSR at Ramakrishnapuram. This will avoid any surplus (Resulting in MSR Overflow) or deficit condition (Resulting in Drying of MSR) that may occur in any of the system due to excess requirement or less requirement by the Distribution System compared to inflow to any of the MSR and

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM both MSR’s thereby will act as a balancing reservoir during such circumstances. The hydraulic designs of all the Feeder mains are listed in Volume II, Feeder Main part of this report.

(v) Appurtenances Proposed

1. Sluice Valve

Details of sluice valves proposed with sizes and numbers in both the system are listed below in Table

No.2.32

Table No. 2.32 - Sluice Valves in Feeder Main Feeder Mains 100 125 150 200 250 300 350 400 500 600 700 Pillur Main I - - - 8 2 6 2 - 2 - 2 Pillur Main II - - - 3 1 8 2 3 1 - - Pillur Main III - - - - - 1 - - - - - Pillur Main IV - - 1 - - 1 - - - - - Siruvani Main I - - - 1 - 4 1 2 - 1 - Siruvani Main II ------1 - Siruvani Main III - 2 - 2 - - 1 - - - - TOTAL 0 2 1 14 3 20 6 5 3 2 2

2. Scour Valve

Details of scour valves proposed with sizes are listed below in Table No. 2.33

Table No. 2.33 - Scour Valves in Feeder Mains

Feeder Mains 100 125 150 200 250 300 350 400 450 500 700 800

Pillur Main I - 4 2 4 1 - 1 - 1 - -

Pillur Main II - - 1 2 1 1 3 - - - 4

Pillur Main III - - - 2 ------

Pillur Main IV 1 - 2 - 1 1 ------Siruvani Main I - - 1 - 2 3 1 - - - -

Siruvani Main II ------1 - - -

Siruvani Main III 1 1 - 2 ------TOTAL 2 1 6 6 9 5 4 5 1 1 0 4

3. Air Valve

Details of Air valves proposed with sizes are listed below in Table No. 2.34

Table No. 2.34 - Air Valves in Feeder Mains Feeder Mains 50 80 100 150 200 Pillur Main I - 7 6 3 1 Pillur Main II 0 3 4 2 3

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Feeder Mains 50 80 100 150 200 Pillur Main III - - 2 - - Pillur Main IV 2 3 1 - - Siruvani Main I - 1 2 3 1 Siruvani Main II - - - 1 - Siruvani Main III 1 1 - - - TOTAL 3 15 15 9 5

4. Flow Regulating Valves

Flow regulating valves are proposed at the Inlet of SRs coming under each feeder main system listed below where residual pressure is very high when compared to other SRs. This will help to regularize the flow within the system and for equal distribution at the same time for all the SRs. The details of Flow Regulating valves are listed in Table No.2.35

Table No. 2.35 – Flow Regulating Valves for Pillur System Feeder Mains 50 65 80 100 125 150 200 Pillur Main I - 1 2 2 5 2 1 Pillur Main II - 2 - 1 - 1 2 Pillur Main III ------Pillur Main IV ------Siruvani Main I - - - - 1 - 1 Siruvani Main II ------Siruvani Main III ------TOTAL 0 3 2 3 6 3 4

The typical details of Sluice Valves, Scour Valves & Air valves and other Standard Drawings are shown in Dwg No. 10/1811150/WSS/WIN/140 to 142, Volume VI part of this DPR.

5. Bulk Water Meters and Data Loggers Bulk water meters are proposed at the outlet of each SR and MSR for each DMAs. This will meet the requirement of determining the transmission losses at feeder mains and also to ascertain distribution system losses. Number of bulk water meters proposed are 101 out of which 101 numbers are used in Distribution Sytem Zones and 4 numbers for MSRs.  Outlet at MSR – Sum of outlet at SRs = Transmission Losses in Feeder Mains  Outlet at Each SR - Sum of Consumption = Distribution Losses in the Network

The typical details of Bulk Water Meter with Data Logger for Flow & Pressure Measurement and other Standard Drawings are shown in Dwg No.10/1811150/WSS/WIN/144, Volume VI part of this DPR.

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(vi) Observations on Hydraulic Design of Feeder Mains The following are the observations made from the hydraulic design of the Feeder Main System

1. Pillur System  Three existing SRs - Jai Nagar, RG Nagar and Rathinapuri SR and three proposed SRs namely Nehru Street SR, Ramasamy Nagar SR, Sanganur road SR in North Zone are in higher elevation with the level difference of 2 to 3 m higher than the exisitng MSR at Ramakrishnapuram. So it is not being fed by the feeder mains under gravity system. Hence ground level sump of 10 LL capacity with the retention time of 60 minutes is proposed at Rakatchi Garden and pumping arrangements is proposed for the above 6 SRs.  Pipe Outlet of Proposed SR near to Ramakrishnapuram MSR is connected below the Maximum Water Level of the reservoir to get its supply from Existing MSR at Pillur (to suit gravity supply) and thereby to avoid sump cum pump arrangements

2. Siruvani System  Bharathi Park MSR consists of two tiers with 17 LL & 10 LL capacities. Top tier is utilised for serving the SRs and the bottom tier is utilised for serving the proposed sump at Sanganur Chintamani SR by gravity and thereby to 6 other direct feeding SRs by pumping.  Local pumping arrangement has been proposed from the proposed sump at Sanaganur Chinthamani SR to existing Sanganur Chinthamani SR and proposed Chinthamani SR  Presently Sanganur Chintamani SR is fed by gravity by the available head from Siruvani MSR with the maximum water level condition. But since hydraulic designs are carried for the Lowest Water Level condition and not for maximum water level, a sump has been proposed at Sanganur Chintamani SR and a local pumping arrangement is now proposed.  Pipe Outlet of Proposed SR near to Bharathi Park MSR is connected below the Maximum Water Level of the reservoir to get its supply from Existing MSR at Bharathi Park (to suit gravity supply) and thereby to avoid sump cum pump arrangements  The details of proposed pumpsets are listed below in Table No. 2.36

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.36 - Pumpset Duty (of Each Pumps) for Pillur and Siruvani System

Discharge Head Duty S.No System Numbers (Nos) Details (Lpm) (m) (HP) 1 PILLUR Horizontal Split Case Pumpset - 75 % Rakatchi Sump to Rakatchi SR (Local a) 5640 27 44 2 Nos (1W + 1S) Efficiency - (Intermediate Stage - 100 % Pumping) Stand by) Horizontal Split Case Pumpset - 75 % Rakatchi Sump to Jai Nagar SR & 4 b) 5460 49 78 3 Nos (2W + 1S) Efficiency - (Intermediate - 50 % Stand other SR’s by) 2 SIRUVANI Sanganur Sump to Sanganur Exist SR Submersible - 75 % Efficiency a) 960 20 6 2 Nos (1W + 1S) (Local Pumping) (Intermediate - 100 % Stand by) Sanganur Sump to Chintamani Prop Submersible - 75 % Efficiency b) 2580 27 20 2 Nos (1W + 1S) SR (Local Pumping) (Intermediate - 100 % Stand by) Horizontal Split Case Pumpset - 75 % Sanganur Sump to Revathi L/O SR c) 4080 35 42 3 Nos (2W + 1S) Efficiency - (Intermediate - 50 % Stand (Direct Feeding 6 SR's) by) 3 MSR INTERLINKING Horizontal Split Case Pumpset - 75 % Bharathi Park GLSR to Bharathi Park a) 17400 24 122 3 Nos (2W + 1S) Efficiency - (Intermediate Stage - 50 % MSR (Local Pumping) Stand by)

Note :

1. 10 LL Sump & Pump Room – 2 Nos of 8 x 8 x 5 m Size are proposed for Pillur System for Horizontal Split Case Pumpset arranegment 2. 7 LL Sump are proposed for Siruvani System for Submersible Pumpset arrangement and Pump Room – 1 No of 8 x 8 x 5 m Size for Horizontal Split Case Pumpset arrangement 3. 10 LL Sump & Pump Room – 1 No of 20 x 10 x 6 m Size are proposed for MSR Interlinking System for Horizontal Split Case Pumpset arranegment

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Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

The cost of Feeder Mains for Pillur & Siruvani system (Excluding Pillur Siruvani MSR Interlinking) with all appurtennces is worked out in Volume II – Feeder Main, Sumps & Pumpsets part of this DPR and comes around Rs. 87.23 Crores (As per Schedule of Rates 2016 – 2017)

The cost of Pumpsets, Sump cum Pumps, pump room arrangements, generators with all appurtennces is worked out in Volume II – Feeder Main, Sumps & Pumpsets part of this DPR and comes around Rs. 7.19 Crores (As per Schedule of Rates 2016 – 2017)

2.9.4 Interlinking of Pillur MSR and Siruvani MSR

A separate feeder main system is proposed from the Newly Proposed MSR at Ramakrishnapuram to the Siruvani MSR to overcome the fluctuations at Siruvani supply during the drought conditions. Since the level difference (Lowest Water Level) between both the MSR’s is only 0.86 m (Ramakrishnapuram MSR – Siruvani MSR = 443.86 – 443.00 = 0.86 m) interconnecting both the MSR’s by gravity s is not feasible. So Gravity cum pumping arrangement was made.

1. Gravity System – From Existing MSR at Ramakrishnapuram to Propsoed GLSR at Bharathi Park

2. Pumping System – From Proposed GLSR at Bharathi Partk to Existing MSR at Bharathi Park

 A new proposed GLSR at Bharathi Park are used to store water from Pillur MSR and tackle the fluctuations in Siruvani supply. The existing GLSR at Bharathi Park was found to be a very old system, served its life time and also in dilapted condition, so a new GLSR at Bharathi Park was proposed.

 The Interlinking of gravity main from Pillur MSR to Bharathi Park GLSR is designed for 50 mld transmission capacity. The local pumping arrangement from Bharathi Park GLSR to Bharathi Park MSR is designed with 5 Nos of Horizontal Split Case pumpsets, each pumpset capable of discharging 10 Mld for 23 hours. So any fluctuations is Siruvani supply can be met

117 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

out by suitable operation of pumps in a phased manner to meet the gradual deficit in Siruvani supply. The details of feeder mains and pumpsets are given in Table No.2.37 and 2.38.

Table No. 2.37 - Gravity Interlinking between Pillur MSR & Bharathi Park GLSR Designed Designed Interconnecting Designed Pipe S.No Quantity Length in Km Hours of Feeder Main Details (MLD) Flow (Hrs) MS 10 THK – 900 2626 m Pillur MSR to mm 5813 m 1. 50.00 24 Hours Bharthi Park GLSR MS 8 THK – 800 mm

Table No. 2.38 - Pumping from Bharathi Park GLSR to Bharathi Park MSR Designed Designed Hours S.No Pumping Main Turbine Pump Details Quantity (MLD) of Pumping (Hrs) 7 Nos (5W + 2S) of Duty Bharthi Park GLSR to 1. 50.00 24 Hours 6960 Lps x 24 m x 49 HP Bharathi Park MSR

(i) Appurtenances Proposed

1. Sluice Valve

Details of Scour valves proposed with sizes and numbers in the Interlinking main are listed below in Table No. 2.39

Table No. 2.39 - Sluice Valves in Feeder Main

Interlinking Mains 600 Pillur MSR to Bharathi Park GLSR 1

1. Scour Valve

Details of Scour valves proposed with sizes and numbers in the Interlinking main are listed below in Table No. 2.40

Table No. 2.40 - Scour Valves in Feeder Main

Interlinking Mains 450 Pillur MSR to Bharathi Park GLSR 1

2. Air Valve

Details of Air valves proposed with sizes and numbers in the Interlinking main are listed below in Table No. 2.41

118 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.41 - Air Valves in Feeder Main

Interlinking Mains 150 Pillur MSR to Bharathi Park GLSR 2

The cost for interlinking of Pillur Siruvani MSR by Feeder Main System is worked out in Volume II – Feeder Mains, Sumps & Pumpsets part of this DPR and comes around Rs 12.55 Crores (As per Schedule of Rates 2016 – 2017)

2.9.5 Detailed Engineerign Design – Distribution System

The factors namely Population, Water Demand, Existing SR Capacity, Site Availability for new proposal, Feeder Main routing and Alignments are considered while designing the 24 X 7 water supply system in all zones and all for demo zones

(i) Zoning of the Project Area

The existing 5 water supply zones is rezoned into 4 water supply zones into North Zone, West Zone, East Demo Zone I & East Demo Zone II for effective management of water supply system, by delineating Demo Zone Areas, isolation of Siruvani and Pillur Systems, introducing Billing and Collection Software System, Customer Care Software System, monitoring of Pressure Management Network Systems and easy O & M system, etc., The design of proposed water supply zones is described below.

1. North Zone

This zone covers the northern part of Coimbatore City Corporation with an area of 25.33 Sq.Km. Wards covered under this zone are 1, 2(part), 3(part), 14(p), 17, 18, 19(p), 20(p), 33(p), 65, 66, 67, 68, 69, 70, 71&72 and the density of population is 9200 Persons per Sq.Km. This zone is the gateway to the major hubs such as Mettupalayam, Sathyamangalam and Avinashi and is well connected with National Highways. There are two railway lines; the first one is to Mettupalayam dividing this zone as North West and North East parts and the second one is to Chennai dividing this zone as North and South parts. As a harbinger for the major industries such as textile, foundry and pump etc., there is a scope for rapid development in this zone. The difference in ground level within the zone is 33 m and 20 m respectively and ground level varies from 441.51 m in North West to 408.63 m in North East and 424.34 m in North to 403.62 m in South. In addition, an IT Park Bulk Water Demand of 3 Mld

119 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM was also provided with North Zone as requested by Coimbatore Corporation.

2. West Zone

West Zone covers the Western part of Coimbatore City Corporation with an area of 25.64 Sq.Km. Wards covered by the zone are 34,37,38,44 to 53 & 55 to 64 and covers partly by wards 27, 33, 35, 36, 42 & 54. The density of population is 9383 Persons per Sq.Km. This zone is the gateway to the holy place Marudamalai and university. Coimbatore city is connected with important places like Palakkad and Thadagam by the roads running through this zone. The contours of this zone fall from North-West to South-East and the difference in levels is 35m. The Ground level varies from 442 m in the North-West to 407 m in South-East.

3. South Zone

South Zone covers the southern part of Coimbatore City Corporation and with an area of 23.60 Sq.Km. This Zone covers the wards 6(p), 7(p), 12, 13, 14, 19(p), 21(p), 22, 23, 24, 25(p), 26(p), 39, 40, 41, 42, 43, 54(p). Density of population is 9383 Persons per Sq.Km. This zone is become the gateway to the places such as Palani. Trichy and Palakad and is well connected with National Highways. The railway line to Trichy and Palani are passing through this zone. The Ground level varies from 401.66 m in North West to 389.63 m in North East and 400.86 m in North to 396.89 m in South.

4. East Zone or Demo Zone I & II

East Zone covers the Eastern Part of Coimbatore City Corporation with an area of 31.05 (8.93 Sq.Km for Demo Zone I + 22.12 Sq.Km for Demo Zone II) Sq.Km. Wards covered are 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15,16, 20, 21, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 26 etc. Density of population is 14180 Persons per Sq.Km. This zone is the gateway to major hub such as Mettupalayam, Sathyamangalam, Trichy and Avinashi and is well connected with National Highways. There are three natural water streams or nallas crossings this zone. There are two railway lines. The first one is running to Mettupalayam dividing this zone along the Western Border and the second one is running to Chennai along the Eastern Part. As there is a wide spread of vacant lands available in this zone, there is a possibility for rapid development for residential, apartments, multiple complexes, etc.,

This zone is divided into two parts as Demo Zone I covering Race Course, Ram Nagar & Gandhi Puram areas and as Demo Zone II covering Peelamedu, Peelamedu Pudur, Sowripalayam, Masakalipalayam, Neelikonampalayam and Ondipudur areas. The difference in ground level within

120 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM the Demo Zone I is 25.57 m with levels varying from 429.07 m to 403.50 m and 45.05 m in Demo Zone II with levels varying from 417.21 m to 372.16 m.

(ii) Rezoned Boundaries

The rezoned outer boundaries of the above Zones are mentioned in Dwg No – 10/1811150/WSS/WIN/033, Volume VI part of this DPR.The rezoned or proposed water supply system in each zone for the horizon year demand is shown in Dwg No – 10/1811150/WSS/WIN/034 to 061 for North Zone, Dwg No – 10/1811150/WSS/WIN/062 to 077 for South Zone , Dwg No – 10/1811150/WSS/WIN/078 to 086 for Demo Zone I and in Dwg No – 10/1811150/WSS/WIN/087 to 110 for Demo Zone II and in Dwg No – 10/1811150/WSS/WIN/111 to 139 for West Zone in Volume VI, Drawing Part of this DPR.

(iii) Propsoed Pipe Materials & Sizes

With a view to minimize the cost for pipe material, old CI pipes satisfying the hydraulic criteria are proposed for retention, removing all AC,PSC and PVC pipes. In the case of new pipes HDPE PN6 PE 100 pipes are proposed for diameters ranging from 90 mm Diameter to 315 mm Diameter and more than 350 mm Diameter pipes shall be of DI K7 pipes.The details of pipe sizes adopted are listed below in Table No. 2.42

Table No. 2.42 - Pipe Sizes Proposed in Distribution System S.No. Pipe material & Pressure Rating Diameter in mm 1 HDPE PN6 PE100 90 to 315 mm 2 DI K7 Above 350 mm

The following details gives the break up of pipe materials that was proposed in hydraulic design of distribution system and also the break up of pipe materials that was retained. The details are given in Table No.2.43 to 2.46

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Table No. 2.43 – Proposed HDPE Pipe Sizes in Distribution System

PROPOSED PIPE LENGTH in Meters (HDPE PIPE) ZONE S.No SUB ZONE 90 mm 140 mm 200 mm 250 mm 315 mm 1 SIDDHAPHUDHUR A 9807 138 - 1136 464 2 SIDDHAPHUDHUR B 9402 40 2626 - 1147 3 TATABAD A 6466 1710 1603 - 589 4 TATABAD B 7635 - 960 892 513 EAST I 5 VOC EX - A 10148 - 2744 3282 - 6 VOC EX - B 14558 - - 3804 1793 7 VOC PROPOSED - A 6095 3983 36 - 2687 8 VOC PROPOSED - B 3480 684 220 - 783 9 ANNA NAGAR A 11087 3879 3110 - - 10 ANNA NAGAR B 11266 2732 3762 - - 11 ANNAI VELANKANNI A 13637 3513 1203 - 4726 12 ANNAI VELANKANNI B 13637 3513 1203 - 4726 13 BHARATHI NAGAR A 10933 889 - 881 - 14 BHARATHI NAGAR B 11456 - - 3787 434 EAST II 15 DJ NAGAR A 10792 372 - - 2940 16 DJ NAGAR B 9295 - 1271 1753 - 17 GV RESIDENCY 9200 474 - - 3698 18 HUDCO COLONY 12891 794 867 2133 - 19 KK NAGAR A 2728 2040 - 2110 - 20 KK NAGAR B 5906 927 - 1380 - 21 KOTHARI NAGAR 8526 - - - 3540

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PROPOSED PIPE LENGTH in Meters (HDPE PIPE) ZONE S.No SUB ZONE 90 mm 140 mm 200 mm 250 mm 315 mm 22 NETHAJI NAGAR A 8442 2655 - 464 - 23 NETHAJI NAGAR B 7449 1725 - - 2116 24 RAJALAKSHMI NAGAR A 10166 58 2741 1007 - 25 RAJALAKSHMI NAGAR B 11886 1143 624 - 1892 26 SIHS COLONY 6808 697 - - - 27 SRI LAKSHMI NAGAR A 5634 - - 2899 - 28 SRI LAKSHMI NAGAR B 12212 - - - 2112 29 TAGORE NAGAR A 3275 375 - 3096 - 30 TAGORE NAGAR B 11994 - - - 3138 31 UPPILIPALAYAM 10013 - - 2687 - 32 AVARAMPALAYAM 3249 493 132 - 226 33 GANDHINAGAR 7523 483 - 685 136 34 JAI NAGAR A 11421 3937 - - 287 35 JAI NAGAR B 25840 - 6050 - 522 36 KAMADHENU NAGAR 2738 924 - 542 373 37 KAMARAJAPURAM 5717 165 1054 999 1160 38 KARUPAYYA GOWNDER A 7640 - 2338 - 421 NORTH 39 KARUPAYYA GOWNDER B 5816 928 2034 - 828 40 NEHRU STREET A 5149 - 1000 - - 41 NEHRU STREET B 7579 4980 570 - - 42 PEELAMEDU A 10091 401 2197 - 1250 43 PEELAMEDU B 5084 2157 - - - 44 PONNI NAGAR A 8433 - - 1679 1003 45 PONNI NAGAR B 11013 1580 - 721 -

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PROPOSED PIPE LENGTH in Meters (HDPE PIPE) ZONE S.No SUB ZONE 90 mm 140 mm 200 mm 250 mm 315 mm 46 PRP 15873 - - 598 1303 47 RAKACHI GARDEN A 10809 3619 - - 1536 48 RAKACHI GARDEN B 27409 3526 - - - 49 RAMAKRISHNAPURAM A 22546 3989 - - - 50 RAMAKRISHNAPURAM B 26841 3552 - 720 3741 51 RATHINAPURI 2901 - 801 - - 52 RAYYAPA NAGAR A 7099 - - 1248 1133 53 RAYYAPA NAGAR B 4359 955 1558 - - 54 RG NAGAR 8200 - 1246 22 - 55 SANGANUR ROAD A 5418 1273 - - 711 56 SANGANUR ROAD B 6142 - 575 - - 57 VKR ZONE A 23328 1801 1155 1273 - 58 VKR ZONE B 23122 - 2525 - 1332 59 AKS NAGAR A 4664 747 1204 - - 60 AKS NAGAR B 11530 - - 1818 643 61 AKS NAGAR C 6696 - - - 1704 62 BHARATHI PARK A 2587 8711 - - - 63 BHARATHI PARK B 9698 6122 - - - WEST 64 BOOPATHY LAYOUT A 8763 1249 - - - 65 BOOPATHY LAYOUT B 7923 - - 1591 - 66 CHERAN NAGAR 7267 773 - 846 - 67 CHINTHAMANI NAGAR A 6001 - - - 1735 68 CHINTHAMANI NAGAR B 10207 - - - 3048 69 DB ROAD A 5074 770 3770 - 882

124 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

PROPOSED PIPE LENGTH in Meters (HDPE PIPE) ZONE S.No SUB ZONE 90 mm 140 mm 200 mm 250 mm 315 mm 70 DB ROAD B 5257 - - - - 71 GANDHI PARK 6343 - 4271 - 2025 72 HOUSING UNIT A 9206 - - 1428 - 73 HOUSING UNIT B 5347 - - 5036 - 74 ISWARYA NAGAR A 5380 1579 1319 - - 75 ISWARYA NAGAR B 4212 - - 133 2150 76 JAYARAM NAGAR A 7872 402 - - 2257 77 JAYARAM NAGAR B 9459 315 - 2861 620 78 KOILMEDU 1109 - - - 1028 79 KURUNJI GARDEN A 11397 - - - 2380 80 KURUNJI GARDEN B 8094 1494 - 2641 - 81 MADATHUR 5252 965 508 - 1431 82 REVATHY LAYOUT 3163 1476 - 1287 247 83 RS PURAM A 7791 2963 3592 - 1418 84 RS PURAM B 12188 3915 - - - 85 SANGANUR CHINTHAMANI 3795 - - 2211 - 86 VENKATAPURAM 1019 - 765 - - 87 VYSIAL STREET 2132 2208 - - - 88 BSUP 13048 19 1368 - - 89 CLOCK TOWER 5440 2221 - 2210 - SOUTH 90 JK GARDEN 26379 - 2874 - - 91 LAKSHMI MILL COLONY A 2666 381 - - 781 92 LAKSHMI MILL COLONY B 3775 - 963 1634 - 93 PULIYAKULAM A 10566 - 3416 - 613

125 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

PROPOSED PIPE LENGTH in Meters (HDPE PIPE) ZONE S.No SUB ZONE 90 mm 140 mm 200 mm 250 mm 315 mm 94 PULIYAKULAM B 10883 - - 3054 - 95 SINGANALLUR 8560 1820 2721 - - 96 SIVARAM NAGAR 23317 1352 1188 - 3730 97 THIRU NAGAR A 3794 1156 2763 - 50 98 THIRU NAGAR B 7345 - - 4043 - 99 TOWN HALL A 3495 6 - - 692 100 TOWN HALL B 3995 - 1894 - - 101 VALLIAMMAL STREET 9239 362 - 2275 - Total Length in Meters 910092 108110 78821 72866 80693 Total Length in Kilometers 910.09 108.11 78.82 72.87 80.69

Total length of Proposed HDPE Pipes in Distribution System is about 1251 Kms which is 90.85 % of the total D’System length .

126 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.44 – Proposed DI K7 Pipe Sizes in Distribution System

PROPOSED PIPE LENGTH in Meters (DI PIPE) ZONE S.No SUB ZONE 350 mm 400 mm 450 mm 500 mm 600 mm 700 mm 1 SIDDHAPHUDHUR A 100 223 - - - - 2 SIDDHAPHUDHUR B - 1012 - - - - 3 TATABAD A - - 315 394 - - 4 TATABAD B - - - - - 1194 EAST I 5 VOC EX - A 572 140 - - - - 6 VOC EX - B - - 225 2487 - - 7 VOC PROPOSED - A - - - - - 920 8 VOC PROPOSED - B - 370 - - - - 9 ANNA NAGAR A - - - - 536 - 10 ANNA NAGAR B - - - 355 - - 11 ANNAI VELANKANNI A ------12 ANNAI VELANKANNI B ------13 BHARATHI NAGAR A - 256 - - - - 14 BHARATHI NAGAR B ------EAST II 15 DJ NAGAR A - 212 - - - - 16 DJ NAGAR B - - - - 1080 - 17 GV RESIDENCY ------18 HUDCO COLONY - 1057 - - - 1056 19 KK NAGAR A 20 - - - - - 20 KK NAGAR B 277 - - - - - 21 KOTHARI NAGAR - - - 20 - -

127 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

PROPOSED PIPE LENGTH in Meters (DI PIPE) ZONE S.No SUB ZONE 350 mm 400 mm 450 mm 500 mm 600 mm 700 mm 22 NETHAJI NAGAR A 1067 - - - - - 23 NETHAJI NAGAR B ------24 RAJALAKSHMI NAGAR A 569 - - - - - 25 RAJALAKSHMI NAGAR B - 150 - - - - 26 SIHS COLONY - - - 654 - - 27 SRI LAKSHMI NAGAR A - - - 2501 - - 28 SRI LAKSHMI NAGAR B 257 - - - - - 29 TAGORE NAGAR A ------30 TAGORE NAGAR B - - - 1431 - - 31 UPPILIPALAYAM 1256 - 399 - - - 32 AVARAMPALAYAM ------33 GANDHINAGAR ------34 JAI NAGAR A ------35 JAI NAGAR B ------36 KAMADHENU NAGAR ------37 KAMARAJAPURAM - - - 149 - - 38 KARUPAYYA GOWNDER A ------NORTH 39 KARUPAYYA GOWNDER B ------40 NEHRU STREET A - - 1328 - - - 41 NEHRU STREET B - - - 938 - - 42 PEELAMEDU A - 934 - 577 - - 43 PEELAMEDU B - 997 - 1215 - - 44 PONNI NAGAR A - 548 - - - 1014 45 PONNI NAGAR B 1110 - - 878 - -

128 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

PROPOSED PIPE LENGTH in Meters (DI PIPE) ZONE S.No SUB ZONE 350 mm 400 mm 450 mm 500 mm 600 mm 700 mm 46 PRP ------47 RAKACHI GARDEN A 506 - - 594 - - 48 RAKACHI GARDEN B 2939 - - 210 - - 49 RAMAKRISHNAPURAM A 2622 - - - - - 50 RAMAKRISHNAPURAM B - - 125 - - - 51 RATHINAPURI - - - 450 - - 52 RAYYAPA NAGAR A - - - 76 524 - 53 RAYYAPA NAGAR B 521 - - 169 - - 54 RG NAGAR ------55 SANGANUR ROAD A ------56 SANGANUR ROAD B - 406 - 1371 - - 57 VKR ZONE A 1758 402 - 1054 - - 58 VKR ZONE B - 1148 - 282 - - 59 AKS NAGAR A 912 - - - - - 60 AKS NAGAR B - - - 632 - - 61 AKS NAGAR C - - 794 - - - 62 BHARATHI PARK A - - - 3237 - 548 63 BHARATHI PARK B - - - 4064 - - WEST 64 BOOPATHY LAYOUT A 1331 - - - - - 65 BOOPATHY LAYOUT B 1284 - 399 - - 1218 66 CHERAN NAGAR - 196 - - - - 67 CHINTHAMANI NAGAR A - - 37 1030 - - 68 CHINTHAMANI NAGAR B - - 803 - - - 69 DB ROAD A ------

129 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

PROPOSED PIPE LENGTH in Meters (DI PIPE) ZONE S.No SUB ZONE 350 mm 400 mm 450 mm 500 mm 600 mm 700 mm 70 DB ROAD B 1665 - - 217 - - 71 GANDHI PARK - - - 1070 - 273 72 HOUSING UNIT A 2974 - - - 839 - 73 HOUSING UNIT B 250 - - 681 - 1156 74 ISWARYA NAGAR A 1085 - - - - - 75 ISWARYA NAGAR B - - 322 - - - 76 JAYARAM NAGAR A - - - 50 - - 77 JAYARAM NAGAR B ------78 KOILMEDU ------79 KURUNJI GARDEN A - - 853 - - - 80 KURUNJI GARDEN B 1929 - - - - - 81 MADATHUR ------82 REVATHY LAYOUT ------83 RS PURAM A - 164 - - - - 84 RS PURAM B - - 1872 49 - - 85 SANGANUR CHINTHAMANI 307 - - - - - 86 VENKATAPURAM ------87 VYSIAL STREET - 574 - - - - 88 BSUP - - - 992 99 - 89 CLOCK TOWER - 446 - 162 - - SOUTH 90 JK GARDEN - - 687 - - - 91 LAKSHMI MILL COLONY A ------92 LAKSHMI MILL COLONY B 150 - - - - - 93 PULIYAKULAM A - 351 - 122 - -

130 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

PROPOSED PIPE LENGTH in Meters (DI PIPE) ZONE S.No SUB ZONE 350 mm 400 mm 450 mm 500 mm 600 mm 700 mm 94 PULIYAKULAM B - 879 - - - - 95 SINGANALLUR - 637 - - - - 96 SIVARAM NAGAR 413 - 1108 - 890 - 97 THIRU NAGAR A - - - 1026 1208 - 98 THIRU NAGAR B - - 178 - - - 99 TOWN HALL A - - 634 - - - 100 TOWN HALL B - 1001 - - - - 101 VALLIAMMAL STREET 1863 - - - 998 - Total Length in Meters 27737 12103 10079 29137 6174 7379 Total Length in Kilometers 27.74 12.10 10.08 29.14 6.17 7.38

Total length of Proposed DI Pipes in Distribution System is about 93 Kms which is 6.75 % of the total D’System length.

131 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.45 – Retained CI Pipes suitable for Hydraulic Design in Distribution System EXISTING PIPE LENGTH in Meters (CI PIPE) ZONE S.No SUB ZONE 100 150 200 250 300 350 400 1 SIDDHAPHUDHUR A - 2233 - - - - - 2 SIDDHAPHUDHUR B ------3 TATABAD A 2728 443 488 - - - - 4 TATABAD B 3211 - 390 - - - - EAST I 5 VOC EX - A - 1260 - - - - - 6 VOC EX - B 1074 - - 629 - - - 7 VOC PROPOSED - A 570 437 - - - - - 8 VOC PROPOSED - B 2690 - 167 - - - - EAST II & 9 to 58 NO EXISTING CI PIPES NORTH ZONE 59 AKS NAGAR A ------60 AKS NAGAR B ------61 AKS NAGAR C ------62 BHARATHI PARK A ------63 BHARATHI PARK B ------64 BOOPATHY LAYOUT A ------WEST 65 BOOPATHY LAYOUT B ------66 CHERAN NAGAR ------67 CHINTHAMANI NAGAR A ------68 CHINTHAMANI NAGAR B ------69 DB ROAD A 650 ------70 DB ROAD B 729 64 - - - - - 71 GANDHI PARK ------

132 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

EXISTING PIPE LENGTH in Meters (CI PIPE) ZONE S.No SUB ZONE 100 150 200 250 300 350 400 72 HOUSING UNIT A - - - 234 - 33 - 73 HOUSING UNIT B ------74 ISWARYA NAGAR A ------75 ISWARYA NAGAR B ------76 JAYARAM NAGAR A ------77 JAYARAM NAGAR B ------78 KOILMEDU ------79 KURUNJI GARDEN A ------80 KURUNJI GARDEN B 511 ------81 MADATHUR ------82 REVATHY LAYOUT ------83 RS PURAM A 2127 ------84 RS PURAM B 2108 ------85 SANGANUR CHINTHAMANI - 30 - 168 - - - 86 VENKATAPURAM ------87 VYSIAL STREET 2164 807 - - - - - 88 BSUP ------89 CLOCK TOWER 504 - 408 - - - - 90 JK GARDEN ------SOUTH 91 LAKSHMI MILL COLONY A 351 125 522 - - - - 92 LAKSHMI MILL COLONY B ------93 PULIYAKULAM A - - - - 209 - 325 94 PULIYAKULAM B 742 - - 439 - - - 95 SINGANALLUR ------

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EXISTING PIPE LENGTH in Meters (CI PIPE) ZONE S.No SUB ZONE 100 150 200 250 300 350 400 96 SIVARAM NAGAR 416 ------97 THIRU NAGAR A ------98 THIRU NAGAR B ------99 TOWN HALL A 2005 883 - 450 - - - 100 TOWN HALL B ------101 VALLIAMMAL STREET ------Total Length in Meters 22580 6282 1975 1920 209 33 325 Total Length in Kilometers 22.58 6.28 1.98 1.92 0.21 0.03 0.33

Total length of Retained CI Pipes in Distribution System is about 33 Kms which is 2.40 % of the total D’System length. Total length of Ratined CI Pipes in Distribution System is about 33 Kms which is 19.53 % of the total Existing CI pipes in D’System length. Total length of Ratined CI Pipes in Distribution System is about 33 Kms which is 2.94 % of the total Existing D’System length. However, as per Technical suggestions of CPHEEO, other than retained CI pipes, the existing pipes, say PVC Pipes – 785 Kms, AC Pipes – 166 Kms, PSC – 2 Kms, out of the above, say 10 % of PVC pipes in every zone, totalling about 79 Kms of PVC Pipelines shall be reused for other schemes and accordingly 10 % of pipe cost has been deducted in cost estimate portion of Distribution System from each zone. The other pipes namey AC / PSC shall not be used for Distribution System

134 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.46 – Total Pipe Length in Distribution System (Including retained pipe)

ZONE S.No SUB ZONE Total Distribution System Pipe Length (m)

1 SIDDHAPHUDHUR A 14101 2 SIDDHAPHUDHUR B 14227 3 TATABAD A 14736 4 TATABAD B 14795 EAST I 5 VOC EX - A 18146 6 VOC EX - B 24570 7 VOC PROPOSED - A 14728 8 VOC PROPOSED - B 8394 9 ANNA NAGAR A 18612 10 ANNA NAGAR B 18115 11 ANNAI VELANKANNI A 23079 12 ANNAI VELANKANNI B 23079 13 BHARATHI NAGAR A 12959 14 BHARATHI NAGAR B 15677 15 DJ NAGAR A 14316 EAST II 16 DJ NAGAR B 13399 17 GV RESIDENCY 13372 18 HUDCO COLONY 18798 19 KK NAGAR A 6898 20 KK NAGAR B 8490 21 KOTHARI NAGAR 12086 22 NETHAJI NAGAR A 12628 23 NETHAJI NAGAR B 11290

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ZONE S.No SUB ZONE Total Distribution System Pipe Length (m)

24 RAJALAKSHMI NAGAR A 14541 25 RAJALAKSHMI NAGAR B 15695 26 SIHS COLONY 8159 27 SRI LAKSHMI NAGAR A 11034 28 SRI LAKSHMI NAGAR B 14581 29 TAGORE NAGAR A 6746 30 TAGORE NAGAR B 16563 31 UPPILIPALAYAM 14355 32 AVARAMPALAYAM 4100 33 GANDHINAGAR 8827 34 JAI NAGAR A 15645 35 JAI NAGAR B 32412 36 KAMADHENU NAGAR 4577 37 KAMARAJAPURAM 9244 38 KARUPAYYA GOWNDER A 10399 39 KARUPAYYA GOWNDER B 9606 NORTH 40 NEHRU STREET A 7477 41 NEHRU STREET B 14067 42 PEELAMEDU A 15450 43 PEELAMEDU B 9453 44 PONNI NAGAR A 12677 45 PONNI NAGAR B 15302 46 PRP 17774 47 RAKACHI GARDEN A 17064

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ZONE S.No SUB ZONE Total Distribution System Pipe Length (m)

48 RAKACHI GARDEN B 34084 49 RAMAKRISHNAPURAM A 29157 50 RAMAKRISHNAPURAM B 34979 51 RATHINAPURI 4152 52 RAYYAPA NAGAR A 10080 53 RAYYAPA NAGAR B 7562 54 RG NAGAR 9468 55 SANGANUR ROAD A 7402 56 SANGANUR ROAD B 8494 57 VKR ZONE A 30771 58 VKR ZONE B 28409 59 AKS NAGAR A 7527 60 AKS NAGAR B 14623 61 AKS NAGAR C 9194 62 BHARATHI PARK A 15083 63 BHARATHI PARK B 19884 64 BOOPATHY LAYOUT A 11343 WEST 65 BOOPATHY LAYOUT B 12415 66 CHERAN NAGAR 9082 67 CHINTHAMANI NAGAR A 8803 68 CHINTHAMANI NAGAR B 14058 69 DB ROAD A 11146 70 DB ROAD B 7932 71 GANDHI PARK 13982

137 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

ZONE S.No SUB ZONE Total Distribution System Pipe Length (m)

72 HOUSING UNIT A 14714 73 HOUSING UNIT B 12470 74 ISWARYA NAGAR A 9363 75 ISWARYA NAGAR B 6817 76 JAYARAM NAGAR A 10581 77 JAYARAM NAGAR B 13255 78 KOILMEDU 2137 79 KURUNJI GARDEN A 14630 80 KURUNJI GARDEN B 14669 81 MADATHUR 8156 82 REVATHY LAYOUT 6173 83 RS PURAM A 18055 84 RS PURAM B 20132 85 SANGANUR CHINTHAMANI 6511 86 VENKATAPURAM 1784 87 VYSIAL STREET 7885 88 BSUP 15526 89 CLOCK TOWER 11391 90 JK GARDEN 29940 SOUTH 91 LAKSHMI MILL COLONY A 4826 92 LAKSHMI MILL COLONY B 6521 93 PULIYAKULAM A 15602 94 PULIYAKULAM B 15997 95 SINGANALLUR 13738

138 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

ZONE S.No SUB ZONE Total Distribution System Pipe Length (m)

96 SIVARAM NAGAR 32414 97 THIRU NAGAR A 9997 98 THIRU NAGAR B 11566 99 TOWN HALL A 8165 100 TOWN HALL B 6890 101 VALLIAMMAL STREET 14737 Total Length in Meters 1376515 Total Length in Kilometers 1377

Total length of Distribution System is about 1377 Kms

However, as per Technical suggestions of CPHEEO, other than retained CI pipes, the existing pipes, say PVC Pipes – 785 Kms, AC Pipes – 166 Kms, PSC – 2 Kms, out of the above, say 10 % of PVC pipes in every zone, totalling about 79 Kms of PVC Pipelines shall be reused for other schemes and accordingly 10 % of pipe cost has been deducted in cost estimate portion of Distribution System from each zone. The other pipes namey AC / PSC shall not be used for Distribution System

139 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

(iv) Service Reservoirs

The details of proposed SRs are given in Table No. 2.47 to 2.52

Table No. 2.47 – Details of Service Reservoirs

SR Capacity Staging Depth of Water Pipe Outlet Sl.No Reservoir Name Zone SR Type GL (m) LWL (m) MWL (m) (LL) Height (m) Storage (m) Level (m)

1 Ramakrishna Puram SR * N Proposed 20.00 12.00 428.860 440.860 444.860 4.000 443.360 * 2 V.K.R Nagar SR N Proposed 18.00 15.00 422.500 437.500 441.200 3.700 442.200 3 Gandhi Ma Nagar SR N Existing 3.00 10.60 428.130 438.730 441.730 3.000 442.730 4 Karuippya Gounder SR N Proposed 9.00 15.00 417.700 432.700 435.800 3.100 438.300 5 Peelamedu SR N Existing 15.00 10.50 413.990 424.490 428.500 4.010 431.000 6 Kamadhenu Nagar SR N Existing 3.00 11.40 409.480 420.880 423.890 3.010 426.390 7 Avarampalayam SR N Existing 2.50 13.30 409.300 422.600 425.100 2.500 427.520 8 PRP Garden SR SR N Proposed 7.00 15.00 411.820 426.820 430.320 3.500 432.820 9 Rathinapuri SR N Existing 6.00 13.70 423.520 437.220 440.220 3.000 445.200 10 Rayappa Nagar SR N Existing 15.00 13.90 418.500 432.400 435.900 3.500 438.400 11 Kamarajapuram SR N Existing 6.00 12.60 419.900 432.500 435.500 3.000 437.500 12 Sanganur Road SR N Proposed 9.00 15.00 423.540 438.540 441.640 3.100 444.140 13 Nehru Street SR N Proposed 18.00 15.00 421.157 436.157 439.857 3.700 442.357 14 Ponni Nagar SR N Proposed 20.00 15.00 411.860 426.860 430.860 4.000 433.360 15 Jai Nagar SR N Existing 10.00 19.90 436.300 456.200 460.200 4.000 462.700 16 RG Nagar SR N Existing 6.00 15.30 428.340 443.640 446.640 3.000 449.140 17 Rakatchi Garden SR N Proposed 20.00 15.00 423.650 438.650 442.650 4.000 445.150

140 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

SR Capacity Staging Depth of Water Pipe Outlet Sl.No Reservoir Name Zone SR Type GL (m) LWL (m) MWL (m) (LL) Height (m) Storage (m) Level (m)

18 Thiru Nagar SR S Proposed 16.00 15.00 393.000 408.00 411.100 3.10 413.600 19 Valliammai nagar SR S Proposed 7.00 12.00 394.510 406.510 410.010 3.500 412.510 20 Singanallur SR S Existing 7.00 8.35 388.900 397.250 400.250 3.000 402.750 21 Puliyakulam SR S Existing 24.00 10.80 405.000 415.800 420.000 4.200 422.500 22 TownHall SR S Existing 16.00 13.60 409.000 422.600 426.800 4.200 429.300 23 Vysia Street SR S Existing 9.00 13.60 409.453 423.053 426.800 3.747 429.300 24 JK Garden SR S Proposed 4.00 15.00 402.090 417.090 420.590 3.500 423.090 25 BSUP SR S Proposed 16.00 15.00 402.090 417.090 420.190 3.100 422.690 26 Lakshmi Nagar Mill colony SR S Proposed 9.00 12.00 408.317 420.317 423.417 3.100 425.917 27 Sivaram Nagar SR S Proposed 19.00 15.00 400.530 415.530 419.430 3.700 421.930 28 Clock Tower SR S Proposed 12.00 15.00 410.150 425.150 428.050 2.900 430.550 29 Bharathi Park SR * W Proposed 20.00 12.00 432.000 444.000 448.000 4.000 446.200 * 30 Chinthamani Nagar SR W Proposed 12.00 15.00 437.319 452.319 455.219 2.900 457.719 31 Housing Unit SR W Proposed 18.00 15.00 422.500 437.500 441.200 3.700 442.200 32 AKS Nagar SR W Proposed 20.00 15.00 418.450 433.450 437.450 4.00 439.950 33 Kurinji Garden SR W Proposed 20.00 15.00 409.900 424.900 428.900 4.00 431.400 34 Sanganur Chinthamani SR W Existing 5.00 7.00 437.404 444.404 449.000 4.596 451.500 35 R.S.Puram SR W Existing 28.00 12.50 427.764 440.264 442.750 2.486 445.250 36 Gandhi Park SR W Existing 19.80 9.75 421.500 431.250 434.250 3.000 436.750 37 D.B.Road SR W Existing 20.00 11.00 422.400 433.400 436.400 3.000 438.900 38 Jayaram Nagar SR W Existing 10.00 17.70 412.500 430.200 433.200 3.000 435.700 39 Cheran nagar SR W Existing 6.00 15.30 413.500 428.800 431.800 3.000 434.300

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SR Capacity Staging Depth of Water Pipe Outlet Sl.No Reservoir Name Zone SR Type GL (m) LWL (m) MWL (m) (LL) Height (m) Storage (m) Level (m)

40 Boopathy Layout SR W Existing 20.00 15.60 439.000 454.600 457.600 3.000 460.100 41 Venkatapuram SR W Existing 2.00 12.00 440.000 452.000 455.000 3.000 457.500 42 Madathur SR W Existing 5.00 7.15 435.000 442.150 445.150 3.000 447.650 43 Revathi Layout SR W Existing 3.00 12.20 435.500 447.700 450.700 3.000 453.200 44 Iswarya Nagar SR W Existing 10.00 12.20 428.500 440.700 443.700 3.000 446.200 45 Koilmedu SR W Existing 2.00 12.80 440.000 452.800 455.800 3.000 458.300 46 Tatabad SR E - I Existing 28.00 8.80 426.000 434.800 438.000 3.2 440.500 47 VOC Park-Proposed SR E - I Proposed 18.00 12.00 423.980 435.980 439.680 3.7 440.680 48 VOC Park-Existing SR E - I Existing 27.00 12.80 423.980 436.780 439.780 3 440.780 49 Siddhapudur SR E - I Existing 20.00 10.10 423.500 433.600 436.600 3 439.100 50 DJ Nagar SR E - II Existing 10.00 14.00 406.290 420.290 423.790 3.500 426.290 51 KK Nagar SR E - II Existing 10.00 13.00 399.030 412.030 415.530 3.500 418.030 52 Nethajipuram SR E - II Existing 12.00 12.00 387.491 399.491 403.141 3.650 405.641 53 SIHS Colony SR E - II Existing 3.00 12.00 399.440 411.440 415.650 4.210 418.150 54 Anna Nagar SR E - II Existing 16.00 15.00 389.110 404.110 407.610 3.500 410.110 55 GV Residency SR E - II Existing 6.00 14.00 395.650 409.650 413.150 3.500 415.650 56 Bharathi Nagar SR E - II Proposed 11.00 15.00 400.610 415.610 419.110 3.500 421.610 57 Tagore Nagar SR E - II Proposed 11.00 15.00 376.946 391.946 395.446 3.500 397.946 58 HUDCO Colony SR E - II Proposed 10.00 15.00 401.420 416.420 419.920 3.500 422.420 59 Annai Velankani Nagar SR E - II Proposed 20.00 15.00 395.590 410.590 414.590 4.000 417.090 60 Rajalakshmi SR E - II Proposed 13.00 12.00 406.262 418.262 421.462 3.200 423.962 61 Sri Lakshmi Nagar SR E - II Proposed 11.00 15.00 400.690 415.690 419.190 3.500 421.690

142 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

SR Capacity Staging Depth of Water Pipe Outlet Sl.No Reservoir Name Zone SR Type GL (m) LWL (m) MWL (m) (LL) Height (m) Storage (m) Level (m)

62 Kothari Nagar SR E - II Proposed 4.00 15.00 380.690 395.690 399.190 3.500 401.690 63 Uppilipalayam SR E - II Proposed 10.00 15.00 388.190 403.190 406.690 3.500 409.190

Note : * Pipe Outlet at Proposed SR at Bharathi Park and Proposed SR at Ramakrishnapuram are connected below the MWL to get its supply from Existing Bharathi Park MSR & Existing MSR at Ramakrishnapuram to suit gravity supply & thereby to avoid Sump cum Pumping arrangements

143 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

Table No. 2.48 – Details of SR & Distribution System Demand

2029 Int Int 2044 Ult Ult Intermedia Demand Industri Int Total Ult Total Distribution Sl. Ultimate Demand Industrial Reservoir Zone SR Type te with 10 % al Flow - 24 Flow - 24 System No Population with 10 % Demand Population Loss Demand hrs (Lps) hrs (Lps) Length (Nos) Loss (LPS) (LPS) (Nos) (LPS) (LPS) 1 Ramakrishna Puram-A N Proposed 17599 30.25 - 30.248 22102 37.99 - 37.988 29157 2 Ramakrishna Puram-B N Proposed 21113 36.29 - 36.289 26516 45.57 - 45.574 34979 3 V.K.R Nagar-A N Proposed 18867 32.43 - 32.428 23695 40.73 - 40.726 30771 4 V.K.R Nagar-B N Proposed 17419 29.94 - 29.939 21876 37.60 - 37.600 28409 5 Karuippya - Zone A N Proposed 9026 15.51 - 15.514 11336 19.48 - 19.484 10399 6 Karuippya - Zone B N Proposed 8134 13.98 - 13.980 10215 17.56 - 17.557 9606 7 Peelamedu-A N Existing 12210 20.99 4.11 25.099 15334 26.36 7.110 33.466 15450 8 Peelamedu-B N Existing 7471 12.84 4.11 16.953 9382 16.13 7.110 23.236 9453 9 Kamadhenu Nagar N Existing 3700 6.36 1.65 8.008 4647 7.99 2.850 10.837 4577 10 Avarampalayam N Existing 3015 5.18 1.37 6.552 3786 6.51 2.370 8.877 4100 11 PRP Garden SR N Proposed 13823 23.76 - 23.758 17360 29.84 - 29.838 17774 12 Rathinapuri N Existing 6997 12.03 3.29 15.317 8787 15.10 5.690 20.793 4152 13 Rayappa Nagar-A N Existing 9307 16.00 4.11 20.109 11689 20.09 7.110 27.200 10080 14 Rayappa Nagar-B N Existing 6982 12.00 4.11 16.113 8769 15.07 7.110 22.181 7562 15 Kamarajapuram N Existing 9224 15.85 - 15.854 11584 19.91 - 19.911 9244 16 Sanganur Road - A N Proposed 8057 13.85 - 13.848 10118 17.39 - 17.391 7402 17 Sanganur Road - B N Proposed 9246 15.89 - 15.892 11612 19.96 - 19.958 8494 18 Nehru Street-A N Proposed 12342 21.21 - 21.212 15500 26.64 - 26.640 7477 19 Nehru Street-B N Proposed 23218 39.91 - 39.907 29160 50.12 - 50.118 14067 20 Ponni Nagar-A N Proposed 17404 29.91 - 29.913 21857 37.57 - 37.567 12675 21 Ponni Nagar-B N Proposed 21011 36.11 - 36.112 26387 45.35 - 45.352 15302 22 Jai Nagar-A N Existing 8305 14.27 - 14.275 10431 17.93 - 17.928 15643 23 Jai Nagar-B N Existing 17209 29.58 - 29.578 21612 37.15 - 37.146 32412 24 RG Nagar N Existing 8596 14.77 - 14.774 10795 18.55 - 18.555 7715

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2029 Int Int 2044 Ult Ult Intermedia Demand Industri Int Total Ult Total Distribution Sl. Ultimate Demand Industrial Reservoir Zone SR Type te with 10 % al Flow - 24 Flow - 24 System No Population with 10 % Demand Population Loss Demand hrs (Lps) hrs (Lps) Length (Nos) Loss (LPS) (LPS) (Nos) (LPS) (LPS) 25 Rakatchi Garden-A N Proposed 13240 22.76 - 22.757 16628 28.58 - 28.580 17064 26 Rakatchi Garden-B N Proposed 26447 45.46 - 45.455 33214 57.09 - 57.086 34084 27 Gandhi Ma Nagar N Existing 5022 8.63 - 8.631 6307 10.84 - 10.839 8827 28 Thiru Nagar - A S Proposed 10978 18.87 6.21 25.074 13787 23.70 10.730 34.426 9997 29 Thiru Nagar - B S Proposed 12701 21.83 6.21 28.036 15950 27.41 10.730 38.145 11566 30 Valliammai nagar S Proposed 12375 21.27 - 21.270 15542 26.71 - 26.713 14737 31 Singanallur S Existing 13386 23.01 - 23.006 16811 28.89 - 28.893 13738 32 Puliyakulam A S Existing 20861 35.85 - 35.855 26199 45.03 - 45.029 15695 33 Puliyakulam B S Existing 20330 34.94 - 34.942 25532 43.88 - 43.883 15997 34 TownHall - A S Existing 16719 28.74 - 28.737 20998 36.09 - 36.090 8165 35 TownHall - B S Existing 14109 24.25 - 24.249 17719 30.45 - 30.454 6890 36 Vysia Street S Existing 15230 26.18 - 26.177 19127 32.88 - 32.875 7862 37 JK Garden S Proposed 7572.45 13.02 - 13.015 9510 16.35 - 16.345 29937 38 BSUP SR S Proposed 30576.16 52.55 - 52.553 38400 66.00 - 66.000 15525 Lakshmi Nagar Mill 39 S Proposed 6937 11.92 - 11.923 8712 14.97 - 14.974 4826 colony -A Lakshmi Nagar Mill 40 S Proposed 9481 16.29 - 16.295 11907 20.46 - 20.464 6521 colony -B 41 Sivaram Nagar S Proposed 37210 63.95 - 63.954 46731 80.32 - 80.319 32414 42 Clock Tower S Proposed 22380 38.47 - 38.466 28107 48.31 - 48.309 11391 43 Bharathi Park - A W Proposed 17632 30.31 - 30.306 22144 38.06 - 38.060 15985 44 Bharathi Park - B W Proposed 21823 37.51 - 37.508 27407 47.11 - 47.106 19784 45 Chinthamani Nagar - A W Proposed 8773 15.08 - 15.078 11017 18.94 - 18.936 8803 46 Chinthamani Nagar - B W Proposed 14009 24.08 - 24.079 17594 30.24 - 30.240 14058 47 Housing Unit - A W Proposed 19132 32.88 - 32.884 24028 41.30 - 41.298 14714 48 Housing Unit - B W Proposed 16215 27.87 - 27.869 20364 35.00 - 35.000 12470 49 AKS Nagar - A W Proposed 9834 16.90 - 16.903 12351 21.23 - 21.228 7527

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2029 Int Int 2044 Ult Ult Intermedia Demand Industri Int Total Ult Total Distribution Sl. Ultimate Demand Industrial Reservoir Zone SR Type te with 10 % al Flow - 24 Flow - 24 System No Population with 10 % Demand Population Loss Demand hrs (Lps) hrs (Lps) Length (Nos) Loss (LPS) (LPS) (Nos) (LPS) (LPS) 50 AKS Nagar - B W Proposed 19106 32.84 - 32.838 23995 41.24 - 41.241 14623 51 AKS Nagar - C W Proposed 12012 20.65 - 20.646 15086 25.93 - 25.929 9194 52 Kurinji Garden A W Proposed 20398 35.06 - 35.059 25618 44.03 - 44.030 14630 53 Kurinji Garden B W Proposed 20465 35.17 - 35.175 25702 44.17 - 44.175 14669 54 Sanganur Chinthamani W Existing 8326 14.31 - 14.310 10456 17.97 - 17.972 6511 55 R.S.Puram - A W Existing 21515 36.98 - 36.979 27020 46.44 - 46.441 17923 56 R.S.Puram - B W Existing 24162 41.53 - 41.528 30344 52.15 - 52.155 20129 57 Gandhi Park W Existing 33824 58.13 - 58.134 42478 73.01 - 73.010 13982 58 D.B.Road - A W Existing 21114 36.29 - 36.290 26517 45.58 - 45.576 11147 59 D.B.Road - B W Existing 15022 25.82 - 25.819 18866 32.43 - 32.425 7930 60 Jayaram Nagar - A W Existing 7489 12.87 - 12.873 9406 16.17 - 16.166 10581 61 Jayaram Nagar - B W Existing 9365 16.10 - 16.096 11762 20.22 - 20.215 13231 62 Cheran nagar W Existing 9693 16.66 - 16.660 12173 20.92 - 20.923 9082 63 Boopathy Layout - A W Existing 14869 25.56 - 25.556 18674 32.10 - 32.096 11343 64 Boopathy Layout - B W Existing 16274 27.97 - 27.972 20439 35.13 - 35.129 12415 65 Venkatapuram W Existing 3673 6.31 - 6.313 4613 7.93 - 7.928 1784 66 Madathur W Existing 9518 16.36 - 16.359 11953 20.54 - 20.545 8156 67 Revathi Layout W Existing 5859 10.07 - 10.070 7358 12.65 - 12.647 6173 68 Iswarya - A W Existing 9750 16.76 - 16.758 12245 21.05 - 21.046 9361 69 Iswarya - B W Existing 7877 13.54 - 13.538 9892 17.00 - 17.003 6819 70 Koilmedu W Existing 3663 6.30 - 6.296 4600 7.91 - 7.906 2137 71 Tatabad - A E - I Existing 23807 40.92 - 40.919 29899 51.39 - 51.3890 14736 72 Tatabad - B E - I Existing 24094 41.41 - 41.411 30259 52.01 - 52.0073 14795 73 VOC Park-Proposed -A E - I Proposed 19669 33.81 3.40 37.203 24702 42.46 5.87 48.3285 14728 74 VOC Park - Proposed-B E - I Proposed 11210 19.27 3.40 22.664 14078 24.20 5.87 30.0696 8394 75 VOC Park-Existing - A E - I Existing 20262 34.83 - 34.826 25447 43.74 - 43.7368 18146 76 VOC Park - Existing - B E - I Existing 28533 49.04 - 49.041 35834 61.59 - 61.5894 24570

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2029 Int Int 2044 Ult Ult Intermedia Demand Industri Int Total Ult Total Distribution Sl. Ultimate Demand Industrial Reservoir Zone SR Type te with 10 % al Flow - 24 Flow - 24 System No Population with 10 % Demand Population Loss Demand hrs (Lps) hrs (Lps) Length (Nos) Loss (LPS) (LPS) (Nos) (LPS) (LPS) 77 Siddhapudur - Zone A E - I Existing 13318 22.89 2.09 24.980 16726 28.75 3.61 32.3597 14104 78 Siddhapudur - Zone B E - I Existing 13566 23.32 2.09 25.406 17037 29.28 3.61 32.8952 14227 79 DJ Nagar - Zone A E - II Existing 8754 15.05 - 15.046 10994 18.90 - 18.8955 14313 80 DJ Nagar - Zone B E - II Existing 10808 18.58 - 18.576 13574 23.33 - 23.3296 13396 81 KK Nagar - A E - II Existing 7784 13.38 - 13.379 9776 16.80 - 16.8025 6898 82 KK Nagar - B E - II Existing 9692 16.66 - 16.658 12172 20.92 - 20.9209 8589 83 Nethajipuram - A E - II Existing 10531 18.10 - 18.100 13225 22.73 - 22.7312 12629 84 Nethajipuram - B E - II Existing 9414 16.18 - 16.180 11823 20.32 - 20.3206 11290 85 SIHS Colony E - II Existing 4240 7.29 - 7.288 5325 9.15 - 9.1523 8159 86 Anna Nagar A E - II Existing 13727 23.59 - 23.594 17240 29.63 - 29.6314 18639 87 Anna Nagar B E - II Existing 13337 22.92 - 22.922 16749 28.79 - 28.7877 18115 88 GV Residency E - II Existing 8717 14.98 - 14.982 10948 18.82 - 18.8161 13363 89 Bharathi Nagar - A E - II Proposed 6390 10.98 6.03 17.016 8026 13.79 10.430 24.2239 12959 90 Bharathi Nagar - B E - II Proposed 7732 13.29 6.03 19.323 9711 16.69 10.430 27.1205 15680 91 Tagore Nagar A E - II Proposed 5288 9.09 2.82 11.908 6641 11.41 4.875 16.2888 6746 92 Tagore Nagar B E - II Proposed 12983 22.31 2.82 25.134 16305 28.02 4.875 32.8984 16563 93 HUDCO Colony E - II Proposed 15692 26.97 7.14 34.108 19707 33.87 12.340 46.2108 18931 Annai Velankani Nagar 94 E - II Proposed 19286 33.15 - 33.148 24221 41.63 - 41.6303 22098 - A Annai Velankani Nagar 95 E - II Proposed 20142 34.62 - 34.620 25297 43.48 - 43.4784 23079 - B 96 Rajalakshmi A E - II Proposed 13954 23.98 - 23.983 17525 30.12 - 30.1204 14537 97 Rajalakshmi B E - II Proposed 12305 21.15 - 21.148 15453 26.56 - 26.5600 15700 98 Sri Lakshmi Nagar A E - II Proposed 10733 18.45 - 18.447 13479 23.17 - 23.1667 11034 99 Sri Lakshmi Nagar B E - II Proposed 10844 18.64 - 18.638 13619 23.41 - 23.4074 14581 100 Kothari Nagar E - II Proposed 7741 13.31 - 13.306 9722 16.71 - 16.7103 12086 101 Uppilipalayam E - II Proposed 13425 23.07 9.17 32.248 16860 28.98 15.860 44.8387 14355

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1395199 2398 Lps 80 Lps 2478 Lps 3012 Lps 139 Lps 3150 Lps 1374734 m TOTAL 1752203 Nos Nos 2072LL 69 LL 2141 LL 2602 LL 120 LL 2722 LL 1375 Km

Table No. 2.49 – Proposed Distribution System Demand or Rezoned Demand

Propsoed D’Syetm Demand for Intermediate Stage Requirement D’System Requirement (From Table 2.48 above ) 214.113 Mld Industrial Demand retained at Existing MSR at Pillur for Intermediate Stage 3.052 MLD Sub Total 217.165 MLD 5 % Transmission Loss 9.42 MLD Distribution System Designed for Intermediate Stage 226.583 MLD (Which is the Project Intermediate requirement) Propsoed D’Syetm Demand for Ultimate Stage Requirement D’System Requirement (From Table 2.48 above ) 272.176 Mld Industrial Demand retained at Existing MSR at Pillur for Ultimate Stage 5.276 MLD Sub Total 277.452 MLD 5 % Transmission Loss 11.83 MLD Distribution System Designed for Ultimate Stage 289.280 MLD (Which is the Project Ultimate requirement)

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Table No. 2.50 – Details of SR with Ward Numbers Covered Sl.No Reservoir Zone SR Capacity (LL) Wards Covered (Old) Wards Covered (New) 1 Ramakrishna Puram N Proposed 20.00 17(P), 70(P), 72(P) 40(P), 47(P), 41(P) 2 V.K.R Nagar N Proposed 18.00 1(P), 2(P), 3(P) 39(P), 38(P), 37(P) 3 Gandhi Ma Nagar N Existing 3.00 72(P) 41(P) 4 Karuippya Gounder N Proposed 9.00 1(P), 2(P), 3(P) 39(P), 38(P), 37(P) 5 Peelamedu N Existing 15.00 1(P), 2(P), 14(P), 17(P) 39(P), 38(P), 66(P), 40(P) 6 Kamadhenu Nagar N Existing 3.00 17(P), 19(P) 40(P), 55(P) 7 Avarampalayam N Existing 2.50 17(P) 40(P) 8 PRP Garden SR N Proposed 7.00 1(P), 17(P) 39(P), 40(P) 9 Rathinapuri N Existing 6.00 67(P) 49(P) 10 Rayappa Nagar N Existing 15.00 69(P), 70(P), 71(P) 48(P), 47(P), 46(P 11 Kamarajapuram N Existing 6.00 66(P), 69(P), 70 (P) 45(P), 48(P), 47 (P) 12 Sanganur Road N Proposed 9.00 66 (P) 45 (P) 13 Nehru Street N Proposed 18.00 33(P), 67(P), 68(F), 69(P) 50(P), 49(P), 49(F), 48(P) 17(P), 18(P), 19(P), 20 (P) 40(P), 53(P), 55(P), 55 (P) 14 Ponni Nagar N Proposed 20.00 69(P), 70(P) 48(P), 47(P) 15 Jai Nagar N Existing 10.0 65(P), 66(P), 72 (P) 44(P), 45(P), 41 (P) 16 RG Nagar N Existing 6.00 66(P) 45(P) 17 Rakatchi Garden N Proposed 20.00 65(P), 70(P), 71(F), 72(P) 44(P), 47(P), 46(F), 41(P) 7(P), 11(P), 12 (P), 14 (P), 23 (P), 24 63(P), 64(P), 75 (P), 66 (P), 18 Thiru Nagar S Proposed 16.00 (P) 67 (P), 68(P) 63(P), 64(P), 75(P) 66(P), 19 Valliammal Street S Proposed 7.00 7(P), 11(P), 12(P) 14(P), 23(P), 24(P) 67(P), 68(P) 20 Singanallur S Existing 7.00 6 (P), 7 (P) 61 (P), 63 (P) 70(P), 69(P), 67(P), 73(P), 21 Puliyakulam S Existing 24.00 21(P), 22(P), 23(P), 25(P), 26(P) 71(P) 13(P), 25(P), 38(P), 39(P), 40(P), 74(P), 73(P), 81(P), 82(P), 22 TownHall S Existing 16.00 54(P) 86(P) 23 Vysia Street S Existing 9.00 41(P), 42(P), 43(P), 44(P) 84(P), 85(P), 84(P), 83(P)

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Sl.No Reservoir Zone SR Capacity (LL) Wards Covered (Old) Wards Covered (New) 24 JK Garden S Proposed 4.00 12(P), 54(P) 75(P), 86(P) 25 BSUP SR S Proposed 16.00 54(P) 86(P) S 26 Lakshmi Nagar Mill colony Proposed 9.00 14(P), 19(P), 21(P), 26(P) 66(P), 55(P), 70(P), 71(P)

27 Sivaram Nagar S Proposed 19.00 13(F), 22(P), 24(P), 25(P) 74(F), 69(P), 68(P), 73(P) 28 Clock Tower S Proposed 12.00 37(P), 38(P) 42(P), 44(F), 45(P) 81(P), 85(P), 83(F), 80(P) 33(P), 34(F), 35(P), 57(P) 61(P), 50(P), 22(F), 22(P), 21(P) 29 Bharathi Park W Proposed 20.00 63(P), 64(P) 13(P), 11(P), 10(P) 22(P), 13(P), 12(P), 11(P) 30 Chinthamani Nagar W Proposed 12.00 34(P), 61(P), 62(P), 63(P) 64(P) 10(P) 31 Housing Unit W Proposed 18.00 55(P), 57(P), 58(F) 76(P), 21(P), 20(F) 32 AKS Nagar W Proposed 20.00 42(P), 52(F), 53(P), 56(P) 85(P), 79(F), 78(P), 77(P) 41(P), 42(P), 43(P), 53(P), 54(P), 84(P), 85(P), 78(P), 86(P), 33 Kurinji Garden W Proposed 20.00 55(P) 76(P) 34 Sanganur Chinthamani W Existing 5.00 34(P), 62(P), 63(P), 64(P) 22(P), 12(P), 11(P), 10(P) 34(P), 35(P), 36(P), 49(F) 50(F), 22(P), 22(P), 25(P), 23(F) 35 R.S.Puram W Existing 28.00 51(P), 52(P), 57(P) 79(F), 24(P), 21(P) 27(P), 36(P), 47(P), 48(F) 51(P), 72(P), 25(P), 24(F) 24(P), 36 Gandhi Park W Existing 19.80 52(P) 79(P) 27(P), 37(P), 44(P), 45(P) 46(P), 72(P), 81(P), 83(P), 80(P) , 37 D.B.Road W Existing 20.00 47(P), 48(P), 51(P) 24(P), 24(P) 38 Jayaram Nagar W Existing 10.00 34(P), 60(P), 61(P), 62(P) 22(P), 14(P), 13(P), 12(P) 39 Cheran nagar W Existing 6.00 56(P) 77(P) 40 Boopathy Layout W Existing 20.00 34(P), 60(P), 61(P), 62(P) 22(P), 14(P), 13(P), 12(P) 41 Venkatapuram W Existing 2.00 59(P), 60(P) 15(P), 14(P) 42 Madathur W Existing 5.00 57(P), 59(P) 21(P), 15(P) 43 Revathi Layout W Existing 3.00 59(P) 15(P) 44 Iswarya Nagar W Existing 10.00 57(P), 59(P) 21(P), 15(P) 45 Koilmedu W Existing 2.00 60(P) 60(P) 46 Tatabad - Existing E - I Existing 28.00 18(P), 29(P), 30(P), 31(P), 32(P), 53(P), 52(P), 51(P), 50(P),

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Sl.No Reservoir Zone SR Capacity (LL) Wards Covered (Old) Wards Covered (New) 33(P), 35(P) 67(P), 69(P) 22(P) 49(P), 48(P) 47 VOC Park-Proposed E - I Proposed 18.00 55(P), 73(P), 71(P), 72(P) 20(P), 25(P), 26(P), 27(P) 28(P), 54(P), 52(P) 51(P), 22(P), 30(P) 31(P), 35(P), 36(P) 48 VOC Park-Existing E - I Existing 27.00 25(P) 49 Siddhapudur E - I Existing 20.00 20(P), 26(P), 28(P), 29(P) 55(P), 71(P), 54(P), 52(P) 38(P), 37(P), 59(P), 58(P), 50 DJ Nagar E - II Existing 10.00 2(P), 3(P), 4(P), 9(P), 10(P), 16(P) 57(P), 56(P) 51 KK Nagar E - II Existing 10.00 15(P), 16 (P) 65(P), 56 (P) 52 Nethajipuram E - II Existing 12.00 4(P), 5(P), 6 (P) 59(P), 60(P), 61 (P) 53 SIHS Colony E - II Existing 3.00 4 (P) 59 (P) 54 Anna Nagar E - II Existing 16.00 4(P), 6(P), 8(P), 9 (P) 59(P), 61(P), 62(P), 58(P) 55 GV Residency E - II Existing 6.00 9(P), 10(P) 58(P), 57(P) 56 Bharathi Nagar E - II Proposed 11.00 4(P) 59(P) 57 Tagore Nagar E - II Proposed 11.00 5(P), 6 (P) 60(P), 61 (P) 58 HUDCO Colony E - II Proposed 10.00 10(P), 16(P) 57(P), 56(P) 59 Annai Velankani Nagar E - II Proposed 20.00 7(P), 10(P), 14(P), 15(P) 63(P), 57(P), 66(P), 65(P) 60 Rajalakshmi Nagar E - II Proposed 13.00 8(P), 9(P), 10(P), 11(P) 62(P), 58(P), 57(P), 64(P) 61 Sri Lakshmi Nagar E - II Proposed 11.00 2(P), 14(P), 16P) 38(P), 66(P), 56(P) 62 Kothari Nagar E - II Proposed 4.00 6(P), 7(P) 61(P), 63(P) 63 Uppilipalayam E - II Proposed 10.00 6(P), 7(P), 8(P), 11(P) 61(P), 63(P), 62(P), 64(P)

Note : All SRs with Importtant Landmarks are annexed in Annexure Number – A11, Volume I (a) Part of this Report

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Table No. 2.51 – Proposed Service Reservoir Capacity Quantification of SR Capacity for Intermediate / Ultimate Stage Requirement Intermediate D’System Requirement = 2141.13 LLD = 2141 / 3 = 713.71 LLD = 71.37 Mld (From Table 2.48) SR Capacity Proposed = 787.30 LLD = 78.73 Mld (From Table No. 2.50) Therefore, Proposed 78.73 Mld > Required 71.37 Mld The higher capacity is due to rounding off SR capacity to next lakh litre as per norms

Table No. 2.52 – Details of SR with Reserved Site 29 New Service reservoirs are proposed in addition to the Existing 34 Service Reservoirs considered for Design. The synopsis of the same are listed below and the details of proposed SRs are listed below

S.No Zone Existing SR Considered for Design Propsoed SR Total Numbers of SRs 1 North Zone 9 8 17 2 South Zone 4 7 11 3 West Zone 12 5 17 4 East Demo Zone I 3 1 4 5 East Demo Zone II 6 8 14 TOTAL 34 Nos 29 Nos 63 Nos

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Ward Availabl Sl. Capacity No Name of the Survey Classificatio Required Reservoir Zone SR Village Name e Area Ref * No (LL) (Old Layout Number n Area (m) (Sqmt) Nos) S.No 174, Page Ramakrishna 1 N Prop 20.00 72 Ganapathy 489/1B1 Ganapathy Park & OHT 45 X 45 353 18 of North Puram Zone S.No 47, Page Vilankurichi 2 V.K.R Nagar N Prop 18.00 03 VKR Nagar 293/P Park 40 X 40 1139 12 of North Village Zone Karuppanna S.No 20, Page Karuppiya 323 & Vacant Land 4 N Prop 9.00 02 Gounder - 35 X 35 - 11 of North Gounder 334 & Kovil L/O Zone S.No 137, Page Sanaganur 5 N Prop 9.00 67 Sanganur 25/3 Sanganur Reserve Site 35 X 35 905 17 of North SR Zone S.No 144, Page Nehru Street 6 N Prop 18.00 69 Nehru Street 41/1 Rathinapuri Vacant 16208 17 of North SR Zone 81/1,2,3,8 S.No 6, Page 2/1,2,3,83 Krishnarayapu 7 PRP Garden N Prop 7.00 01 PRP Garden Park 35 X 35 - 11 of North /1,2 & 84 ram Zone & 85 Rakatchi Site is available(Photograph Annexed) but Details on Land is not available in Land Particulars of Coimbatore 8 Prop 20.00 Garden N Corporation 563/2,563 S.No 55, Page 9 Thiru Nagar S Prop 16.00 07 Thiru Nagar Singanallur Park 45 X 45 1671 /3 3 of East Zone Vallliammal Ramanathap S.No 206, Page 10 S Prop 7.00 24 - - Sub - Dept 25 X 25 2580 Street uram, 9 of East Zone

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Ward Availabl Sl. Capacity No Name of the Survey Classificatio Required Reservoir Zone SR Village Name e Area Ref * No (LL) (Old Layout Number n Area (m) (Sqmt) Nos) Valliammal Street 50/2,51,5 S.No 214, Page Anupparpalaya 11 JK Garden S Prop 4.00 54 JK Garden 5/PT,56,1 Reserve Site 25 X 25 2059 30 of South m 34/1 Zone 12 BSUP SR S Prop 16.00 54 Service Reservoir is proposed as given by Corporation within the BSUP Developed Area Campus Lakshmi Mills 589/1A,5 Lakshmi Colony 90/2,591/ Park, Well, S.No 169, Page 13 Nagar Mill S Prop 9.00 19 (Girls 1,592/1,3 KR Puram Public 35 X 35 2040 7 of East Zone colony Higher Sec 76,175/1 Purpose School B Ground) S.No 44, Page Sivaram Sivaram 338/2A,3, Ramanathapur 14 S Prop 19.00 13 Park II CPS 45 X 45 682 23 of South Nagar Nagar 339/2,3 am Zone Big Bazar & S.No 120, Page Raja 15 Clock Tower S Prop 12.00 38 2/1140 - Clock Tower 35 X 35 364 26 of South Junction Zone Street Bharathi S.No 12, Page 16 Bharathi Park W Prop 20.00 34 park Road - 253/1 Sanganur Reservoir 45 X 45 22951 31 of West 1 Zone S.No 212, Page Chinthamani Public 17 W Prop 12.00 62 KK Pudur 309PT Sanganoor 40 X 40 599 42 of West Nagar Purpose Zone

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Ward Availabl Sl. Capacity No Name of the Survey Classificatio Required Reservoir Zone SR Village Name e Area Ref * No (LL) (Old Layout Number n Area (m) (Sqmt) Nos) 238/2,237 Housing /A1,3,296 S.No 158, Page Play Space, 18 Housing Unit W Prop 18.00 58 Unit, SN /1,236PT, SN Palayam 40 X 40 2260 40 of West Open Palayam 297/A12 Zone A1 S.No 113, Page 115/3,114 19 AKS Nagar W Prop 20.00 52 AKS Nagar TS Ward No 7 Open A 45 X 45 2974 38 of West /1 Zone S.No 152, Page Kurinji Kurinji 479/29PT Kumarapalaya 20 W Prop 20.00 42 Park 35 X 35 2467 27 of South Garden Garden ,480/2PT m Zone S.No 83, Page VOC Park- 21 E - I Prop 18.00 27 VOC Park 1/924 PT CBE Town Park 40 X 40 36280 24 of South Proposed Zone Bharathi Bharathi S.No 6, Page 1 22 E - II Prop 11.00 04 332/2 - Vacant 35 X 35 1549 Nagar Nagar of East Zone 229/2PT, Tagore 229/3,230 S.No 21, Page 23 Tagore Nagar E - II Prop 11.00 05 Singanallur Park 35 X 35 4103 Nagar ,235,236, 1 of East Zone 237 495/1,2A, Hudco HUDCO 3A,503/1 S.No 151, Page 24 E - II Prop 10.00 16 Colony Sowripalayam Park 35 X 35 8772 Colony B,2,504/1 7 of East Zone (Near PSG) B Annai Annai 208, 209, Public S.No 134, Page 25 E - II Prop 20.00 15 Sowripalayam 45 X 45 3683 Velankani Velanganni 201 Purpose 6 of East Zone

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Ward Availabl Sl. Capacity No Name of the Survey Classificatio Required Reservoir Zone SR Village Name e Area Ref * No (LL) (Old Layout Number n Area (m) (Sqmt) Nos) Nagar Nagar

S.No 80, Page Rajalakshmi Rajalakshmi Lakshmi 26 E - II Prop 13.00 10 56 Vacant Land 40 X 40 2959 4 of East Zone Nagar Nagar Puram of CCC 549/1B,5 S.No 111, Page Sri Lakshmi Sri Lakshmi 27 E - II Prop 11.00 14 55/1B,55 Sowripalayam Park 35 X 35 2286 5 of East Zone Nagar Nagar 2/2 Part of CCC 279,283,2 88,289/4, S.No 32, Page Kothari Kothari 294/2,297 28 E - II Prop 4.00 06 Singanallur Play Ground 25 X 25 8125 2 of East Zone Nagar Nagar ,298PT,2 of CC 99,509,54 4/1 S.No 99, Page Uppilipalaya Uppilipalay 29 E - II Prop 10.00 11 218 Uppilipalayam Park / OHT 35 X 35 3003 4 of East Zone m m Park of CCC

Note : Photograph for Each Site is taken seperately and annexed in Annexure Number – A7, Volume I(b) part of this DPR.

* - Reference on avialble land are taken from Coimbatore Municipal Corporation Land Particulars from Town Planning Section

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(v) Abandoned Sumps & SRs

The existing sumps and the old, abandoned SRs less than 1 lakh capacity are eliminated and not considered for rehabilitation are listed in Table No. 2.53 Table No. 2.53 - Details of the Old and Abandoned SRs Ward Number Sl.No. SR Location Capacity (LL) (Old) 1 Maniyakaram Palayam SR 72 1.00 2 Police Quarters SR 72 0.50 3 V.V.Nagar SR 72 0.50 4 V.O.C Nagar Sump 72 0.50 5 Ganapathy Ma Nagar Sump 72 3.00 6 Gandhi Ma Nagar Sump 72 6.00 7 Housing Unit Sump 3 0.50 8 Nanjundapuram SR 12 2.00 9 Sowripalayam SR 14 5.00 (Staghing Height – 8m) 10 Varadharajapuram SR 11 10.00 (Staghing Height – 8m) 11 Uppilipalayam SR 11 10.00 (Dilapted Condition) 12 Bharathi Park GLSR 34 10.00 13 Bharathi Park GLSR 34 10.00 (Dilapted Condition) 14 Gandhi Park GLSR 51 10.00 15 SIHS Colony Sump 4 3.00

The cost for construction of additional service reservoirs for the Intermediate Stage is worked out in Volume V – Structural Design & Estimates part of this report and comes around Rs. 55.66 Crores (As per Schedule of Rates 2016 – 2017)

(vi) Appurtenances Proposed

1. Sluice Valve

Details of sluice valves proposed with sizes in the respective zones are listed below in Table No.2.54

Table No. 2.54 - Sluice Valves in Distribution System

Zone 65 80 100 125 150 200 250 300 350 400 500 East Demo Zone I - 14 - - 3 10 1 13 1 - 3 East Demo Zone II - 29 - - 13 8 19 28 2 3 3 North - 43 - - 18 25 11 34 4 - 1 South -- 17 1 - 6 15 10 20 3 3 - West - 24 1 - 10 9 23 36 4 1 1 TOTAL 0 127 2 0 50 67 64 131 14 7 8

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2. Scour Valve

Details of Scour valves proposed with sizes in the respective zones are listed below in Table No.2.55

Table No. 2.55 - Scour Valves in Distribution System

Zone 50 65 80 100 125 150 200 250 300 350 400 East Demo Zone I - 21 - 1 ------East Demo Zone II - 33 ------North - 32 - 2 - - 3 - - - - South - 13 - 1 2 ------West - 29 - 1 - 1 - - 2 1 TOTAL 0 128 0 4 3 0 4 0 0 2 1

3. Air Valve

Details of Air valves proposed with sizes in the respective zones are listed below in Table No.2.56

Table No. 2.56 - AirValves in Distribution System Zone 50 80 100 150 East Demo Zone I 5 3 2 - East Demo Zone II 10 12 - 1 North 21 6 2 - South 13 5 2 - West 20 8 - - TOTAL 69 34 6 -

The hydraulic designs for all the Distribution System are given in Designs, Volume III part of this DPR.

4. Pressure Control Valves and Bulk Water Meter

Pressure Control valves and Bulk Water Meter are proposed at the outlet of each Distribution system or Sub Zones, say 101 Numbers in order to regulate the pressure manually during night times, where the demand is very less and thereby to safeguard the D’System life and also less staining of the network due to excess pressure.

The cost for Distribution System along with Rider Mains with all the appurtenances is worked out in Volume III – Distribution System & Special Components part of this DPR and comes around Rs. 174.03 Crores (As per Schedule of Rates 2016 – 2017)

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2.9.6 Automation of Distribution System – SCADA

(i) Introduction

For Coimbatore Corporation, it is proposed to have a well planned infrastructure for water supply distribution system, which covers an area of 105.6 sq.km

The infrastructure includes,  Internal Feeder / Transmission mains – 96.50 kms  Interlinking of Pillur & Siruvani MSR systems – 8.5 Kms  Distribution System – 1375 Kms  Overhead Service Reservoirs – 63 Nos  Ground level Sumps – 3 Nos As a part of total integrated monitoring and data acquisition system, it is proposed to install one integrated system which will primarily controlled by PLC locally, networked through GPRS and will have central monitoring, data acquisition and no controls. The proposed system will cover automation and online data acquisition for Pillur system at the master control facility at the MSR site at Ramakrishnapuram, covering feeder mains, SRs and sumps and another one for Siruvani system at the MSR site at Bharathi Park, covering feeder mains, SRs and sumps, and a display facility at Corporation office complex at Townhall. The purpose of integrated automation system is to have the following for effective utilization of resources and handling emergencies centrally and to stop pilferages and distribution losses.  Online data collection of water quality parameters and flow at MSR sites  Monitoring of water level at each SR/ GLSR  Monitoring of discharge from each SR  Online metering of water discharge from each MSRs / SRs / GLSRs  Monitoring operation of pumping machinery in pumping mains  Automatic generation of real time MIS reports without intervention of operator and user defined graphics and reports.

(ii) Scope of work

The scope of the work of establishment of SCADA shall include design, manufacture, testing at works, supply at site, storage at site, installation/erection, testing, commissioning, integrating with the existing system, proving, field testing and handing over the integrated automation system. The scope shall also include total operation and maintenance of the automation system for the period of five years after two years of free operation and maintenance. The payment against AMC for 5 years at the agreed rates shall be made by CCC from its own funds. The AMC shall include free up gradation of

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SCADA software and all consumables that will be required for smooth running of the system.

(iii) System Design

Basically the system is divided in to three sections for each of the two systems namely Pillur and Siruvani systems:  Remote monitoring of SRs / GLSRs in the distribution network  Monitroing of pumping at pumping stations  Centralized monitoring station at respective MSR site The automation system will be designed in three layers.  Field instruments like level transmitters, pressure transmitters, motorized actuators, analyzers etc.  PLC/RTU based control system with local HMI and facility to network with SCADA at remote places through GPRS/GSM/RF  Centralized monitoring stations at each MSR site and both shall be connected to CCC head office through wireless /GPRS/ Broad Band The central monitoring station is proposed to have SCADA software, which will carryout real time data collection and will have facility of report generation and monitoring. The networking of different sections and SRs with central SCADA system shall be such that instantaneous status of the sections shall be available on web through web browsers. In addition to the centralized data collection, the system shall also generate SMS alerts from the point of generation.

(iv) Proposed System

1. SRs / GLSRs in Distribution Network

There are 63 SRs and 3 GLSRs spread all over the territory of CCC operated by manually operated valves. It is proposed to monitor the levels and flow through each SRs on real time basis and to have monitor over the discharge of each SRs through actuated valves from central SCADA of respective system. Each SR site, it is proposed to install one ultrasonic level transmitter, one pressure transmitter, and one flow transmitter, and one electrically actuated valve. All these equipments are proposed to be connected to one PLC / RTU and it will be connected on wireless network to the central SCADA station of the respective system.

Each PLC / RTU at SR shall have one 6” touch screen HMI for the operator to monitor the valves. The PLC/RTU of each SR shall collect the input data and transmit the same to central SCADA at an interval of not more than 5 min. The operation of discharge valve shall be possible from central SCADA also. The maximum time delay form the command to initiation of valve shall not exceed 10

160 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM sec. The network shall be such that update time or remote operation shall not be affected by traffic on wireless network. Each SR site shall also be provided with a UPS of suitable rating so that in the case of power failure the flow data is not lost and the monitoring system will still keep working. The connectivity of individual PLC at each SR site will be either through GPRS or through broadband connection of service providers without fixed IP.

2. Central SCADA Station at MSRs

SCADA stations is proposed at Ramakrishnapuram MSR site for Pillur system and at Bharathi Park MSR site for Siruvani system: These stations shall be acting as a master control stations as well as MIS centers. The system shall be capable of generating various user defined reports. One of the computer stations shall act as a history server. SCADA shall be provided with unlimited tags with run time and also of development version.The monitor room will have two servers and two operator terminals all connected on LAN. One operator terminal will have minimum 42” LCD monitor which will display current status of total water system in graphical form. The servers shall work in redundancy mode so that failure of one of the server will not result in to loss of data or monitoring. The monitoring room shall be provided with online 10 KVA UPS capacity with the backup time of 4 hrs. The monitoring station shall be provided with broadband connection with fixed IP.At the head office of the CCC at TownHall, one operator terminal with a minimum 42” LCD monitor displaying the current status of both the water supply systems will be installed and this will be connected

The cost for Special Components like Automatic Meter Reading (AMR) System, Disinfection Units, Any Time Payment Machine (ATP), Bulk Water Meter with Data Logger for Flow & Pressure Measurement and room for Data Logger, Gas Chlorination Disinfection is worked out in Volume III – Distribution System & Special Component part of this report and comes around Rs. 150.47 Crores (As per Schedule of Rates 2016 – 2017)

The cost for Common Components like SCADA and Water Quality Test Laboratory is worked out in Volume IV – Common Components & Data Bank part of this DPR and comes around Rs. 8.10 Crores (As per Schedule of Rates 2016 – 2017)

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2.9.7 Clearances Required From Other Agencies

For this project, clearances required from other agencies such as land acquisition, road crossing, railway crossing, etc., are listed down in Volume I (b), Annexure Number – A12 part of this DPR

2.10 Environmental Impact Assessment

This section identifies and assesses the probable impacts on different environmental parameters due to planning, construction and the operation of the proposed development in the CCC area. After studying the existing baseline environmental scenario, initial field surveys, reviewing the process and related statutory norms, the major impacts have been identified and assessed during the design, construction and the operation phases.

2.10.1 Objective of EIA

Water Supply, Drainage and Sewerage Systems, Roads and Electricity form significant infrastructure components of any urban area. Since the city’s cleanliness to a great extent, depends on the Water Supply, Drainage and Sewerage, Roads and Electricity systems, efficient and effective planning, design, implementation and operation of these systems warrant importance.

Though the very purpose of the water supply, drainage and sewerage, roads and electricity systems is to enhance the quality of urban life, there are certain adverse impacts attached to them. These impacts are usually due to ill-planning of the systems and selection of inappropriate technologies for the treatment and disposal of the wastes. Therefore, the negative impacts of these projects can be easily addressed through both proactive and reactive measures.

Any development project therefore has a potential to cause Environmental and Social impacts. These impacts are in the form of displacement of people from the project area or causing impairment of the ambient environment of the people living in or near the project area. By taking into account the location aspects of the project and through proper rehabilitation and replacement plans and environment management plan, these impacts can be mitigated.

The following items form part of the Environment and Social Impact:

 Legal and Policy Framework;  The proposed project;  The existing environment; and  Environmental Management Plan

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2.10.2 Legal and Policy Framework

Major development projects are governed by international, national and local rules and regulations pertaining to various aspects of project development viz., engineering, safety, environment, etc., the frame work and standards related to this are described in the following paragraphs.

2.10.3 Environmental Assessment and Review Process

GOI policies and guidelines exist on the following environmental components:

 Environmental and Occupational health and safety  Forest  Air Quality  Water and Effluent Quality  Social and Cultural Issues  Community Involvement

2.10.4 National Regulations

India is the first country which has made provisions for protection and improvement of the environment in the Constitution. This was done in 1976 during the 42nd Amendment to the Constitution. These provisions were incorporated in the Constitution of India with effect from January 1977. Article 51(g) of the Constitution states that “It should be the duty of every citizen of India to protect and improve the natural environment including forest, lakes, rivers and wild life, and to have compassion for living creatures”.

In India, as far as policy, legal and administrative framework with regard to the environment are concerned, there are numerous acts formed over time, applicable to enacted at the National level barring one or two pertaining to a particular region or State.

Provisions exist in various acts to tackle environment pollution. However, with the country’s emerging environment scenario due to industrialization in the post independence era, these were found either inadequate or being not effectively applicable to prevent degradation of the environment. After the Stockholm Conference on human and air pollution, it was considered appropriate to have uniform laws across the country for broad environmental problems endangering the health and safety of people as well as the flora and fauna. The Water (Prevention and Control of Pollution) Act 1974 was the first enactment by the Parliament in this direction, and the pollution control boards at the Centre and in the States came into being. Another piece of legislation enacted was the Water (Prevention and Control of Pollution) Cess Act 1977 in order to conserve water and to augment the finances of the regulatory agencies. Thereafter, the Air (Control and Pollution Prevention) was enacted in 1981 and the task of implementation of the legislation was entrusted to the same regulatory agencies created under the Water (Prevention and Control of Pollution) Act, 1974 as the Water (Prevention and Control of Pollution) Act were designed to deal with only water and air pollution

163 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM problems respectively. It was in 1986 that the Parliament enacted a comprehensive or umbrella legislation for the protection of the environment in its entirety. This was the Environment (Protection) Act 1986. Over the years, several amendments have been made to the various existing statutes and several notifications have been issued to address the environmental issues.

Project related impacts occur at three stages of the project:

1) Planning and Design 2) Construction 3) Operation Planning and Design stage incorporates the location of the water intake point, location of the new water treatment facilities, water treatment steps, laying of the pipeline and construction details, materials of construction etc. which ultimately decide the impact during construction and operation phase. While some of the construction phase impacts are temporary, some are permanent. The Operation phase impacts are generally continuous in nature. To identify these impacts broadly on physical and ecological environment, Impact Identification Matrix has been developed in the later part of this chapter. The various Acts and Notifications on Enviromental issues have been presented in the following table:

Summary of Indian Environment Acts

Acts / Rules / Brief Description Remarks Notifications All due care has to be taken to protect Management of forest areas as the wild life habitats, particularly the The Wild Life national parks, Sanctuaries, rare and endangered species, while Protection Act, 1972 Game Reserves and Closed conducting the construction and Areas operation activities Restriction on the de- The Forest reservation of forests, clearing Forest clearance to be obtained in order (Conservation) Act, of forests, cultivation of tea, to clear the construction Right of Way 1980 coffee, spices, etc., conversion (RoW) of land for non-forest uses, etc. The Water Provides for the prevention and Indirect impact associated during the (Prevention and control of water pollution as construction phase with wastewater Control of Pollution) well as restoration of water generation Act, 1974 quality Provides for the levy and The Water collection of cess on water (Prevention and For use of water in labour / staff consumed by persons of certain Control of Pollution) colonies and other installations industries and by local Cess Act, 1974 authorities Proponent will have to control The Air (Prevention Objective is to prevent, control emissions of dust and noise during the and Control of and reduce air pollution construction phase as well as exhausts Pollution) Act, 1981 including noise pollution of machinery / vehicles The Environment An umbrella legislation which Environmental standards for discharge (Protection) Act, takes in to account all the and emissions are also promulgated

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Acts / Rules / Brief Description Remarks Notifications 1986 aspects of environment. from time to time Management of hazardous chemicals, wastes, micro organisms, etc. also included Promulgated under the The Manufacture, environment (Protection) Act, Storage and import of 1986. The principal objectives Hazardous Chemical are the prevention of major Rules, 1989 accidents arising from industrial activities and the Significant Risk analysis and disaster mitigation of effects of such management plan for the potential

accidents on life, property and hazards of the installations have to be environment prepared This notification requires every person carrying out on industry, operation or process requiring Will need to be submitted in case of Environmental Audit consent to operate under water continuing activities under the air and Notification, 1992 and air acts to submit an annual water acts statement to the state pollution control board Through this notification, the The Environmental EIA is mandatory for this project vide MoEF made Environment Impact Assessment Item No. 9 of Schedule I of the Impact Assessment for 29 Notification, 1994 Notification different activities Environmental Through this Notification, Protection rules – public hearings are made Details of the public hearing must be Notification of mandatory before giving incorporated in Environment Environmental Public environmental clearance or Management Plan Hearing, January activity, either private or 1997 government Declared the coastal stretches of seas, bays, estuaries, creeks, Notification for rivers and backwaters which are Any construction activity is not Coastal regulation influenced by tidal action, up to permitted within the CRZ Zone (CRZ), 1991 500m from the high tide line and the land between the low and high tide lines Provides for liability for damages arising out of any accident occurring while handling any hazardous The National Compensations should comply with the substance and for the Tribunal Act, 1995 Act establishment of a National Tribunal for effective and expeditious disposal of cases arising from such a accident

This act imposes on the owner Provisions for insurance to be made, The Public Liability the liability to provide prior to the commencement of the Insurance Act, 1991 immediate relief with respect to project, in accordance with the Act death or injury to any person or

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Acts / Rules / Brief Description Remarks Notifications damage to any property resulting from an accident while handling any of the notified hazardous chemicals Must comply with the rules, in case of The Hazardous Waste Prescribe guidelines for generation of hazardous wastes during (Management and handling hazardous wastes the construction and operation phases of handling) rules, 1989 the project.

2.10.5 Necessity for this EIA Study

It is necessary to study the environmental impact of the project so that necessary preventive and corrective measures can be suggested to minimise the potential negative impacts of this project and thereby secure maximum benefits to the people and the environment. This study involves the following:

(a) Identification and assessment of all the likely environmental and social impacts of the project components

(b) Development of an environmental management plan for making the project environmentally sound and socially acceptable

(d) Overall aim is to maximize the benefits of the project and minimize/mitigate environmental and social risks due to the proposed project.

Environmental Impacts Positive Impacts

Following are the positive environmental impacts of the project:

1. Social Impact due to provision of protected water supply.

2. The town is benefited with water supply.

3. Health of the community would be improved.

4. Improved community hygiene.

5. Local employment due to additional investment. Thereby local economy improves.

6. Improvement in social and economic status.

7. Additional water provided will help in fire safety.

8. Living conditions improves.

9. Decrease in water borne diseases

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10. Women can utilize time spent for fetching water from long distances to other beneficial purpose.

11. Noise and nuisance created by water tankers and lorries are avoided.

Negative Impacts

Following are the negative environmental impacts of the project:

1. Traffic is disturbed during laying water mains.

2. Dust problem during construction.

3. Communication facilities may get affected.

4. Noise near pumping station sites.

5. Disposition of water tanker owners.

6. Property & Economical assets are created which have to be maintained.

7. Health hazard in handling chemicals like chlorine.

8. Possibility of chlorine leakage.

2.10.6 Broad Paradigms for Mitigation Plan 1. Adequate safety signals to be provided like “Men at work”, “Take Diversion”, etc and traffic to be effectively diverted.

2. Sprinkling of water can reduce dust.

3. Adequate care to be taken not to disturb the communication systems by identifying the locations in consultation with the respective departments.

4. Noise can be reduced by proper design and maintenance and planting of trees around sump cum pump houses. If required, glass partitions can be provided as sound barriers.

5. Carry out repairs wherever possible when traffic is minimum. Ensure good house keeping.

6. Action would be taken for installation of sewerage system and storm water drainage system and avoid stagnation of water.

7. Backwash water should be properly disposed of

8. All precautions would be taken to avoid leakage of chemicals during post chlorination. The operators would be instructed regarding handling of chemicals, action to be taken in case of emergency, etc.,

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2.10.7 Resettlement and Rehabilitation Issues

As all the sites proposed for construction of new service reservoirs, ground level sumps etc., are owned by Coimbatore Corporation, there will be no resettlement or rehabilitation issues to be confronted during the implementation of this project.

2.10.8 Management of Noise Impacts

Following precautionary measures are recommended for the management of noise impacts.

1. To minimise the impact, construction operations in residential and sensitive areas should be restricted to between 7.30 a.m. and 6.00 p.m.

2. Prior information should be provided if the blasting is significant.

3. Noise level should be reduced by provision of enclosures to generator sets and concrete mixers at the sites.

4. Noise Level of Construction Machinery should not exceed the following limits

Construction Machinery dBA at 2 m Distance Truck 85 Generator 96 Concrete Mixer 89 Flitting Mixer 85 Vibrator 86 Batching Plant 86 Crane 85

Permissible level 55 d BA

2.10.9 Managing Impacts due to Construction Machinery

Precautionary measures in order to avoid adverse impacts due to traffic congestion are as follows:

1. The most suitable route should be selected for delivery and haul equipment with due consideration for load limits, traffic pattern and the character of the area traversed.

2. Traffic controls and diversions, marked with signs, lights and other measures (flags) should be provided. This is necessary to minimise confusion and ensure public safety. Police and fire departments should be informed before any route is closed. Also, routes should not be closed until an alternative road is identified.

3. Prospective contractor should follow the prescribed safe, legal laid limits of all bridges and surface roads that may be traversed by the heavy equipment used at the project sites.

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2.10.10 Managing Impact of Air Pollution

Construction activities and the consequent transportation activities add to the air pollution in the region. Impact of the air pollution will be moderate and short term while laying distribution lines.

Precautionary Measures 1. It is recommended that the construction equipment, machinery and diesel engines be maintained in good condition so as to reduce emissions.

2. Dust should be controlled by sweeping and sprinkling with water. Mud should be washed from all construction equipment and vehicles prior to hauling on roads.

3. Trucks carrying dust and sand to and from the construction site should be covered or wetted in accordance with the construction specifications prescribed by the Coimbatore City Corporation to minimise release of dust.

Potential Air Quality and Noise Impact Issues Activity Location Impact Pipeline laying Roadside areas Dust problem for Commuters and road users Construction of Proposed Reserved Site areas Dust problem for near by living habitants Service Reservoirs Construction of Proposed Sump cum Pumping Reserved Site areas Dust problem for near by living habitants arranegments

Pipeline laying

For laying of pipelines, the impacts on air quality during construction are due to generation of dust for excavation and handling of construction materials. Dust generation during pipeline laying is important because it passes by roadside which is used by commuters and local people.

After pipelines are laid underground and the trench is filled with soil, the topsoil is not often properly compacted and the debris is left behind. This causes dust pollution for quite some period until the top cover stabilizes. Dust pollution may therefore have a significant impact if not properly mitigated.

Short-term exposure to particulates can aggravate lung diseases, causing asthma attacks and acute bronchitis and may also increase susceptibility to respiratory infections.

Construction of Service Reservoirs & Sump cum Pumps

Construction work for these infrastructures can be divided into three groups – excavation work, foundation work and superstructure work. Certain foundation work may involve development of pile driving rigs etc. These activities may generate noise pollution. Besides foundation work will involve trench cutting, digging and concreting work. The work will involve steel and concrete work, masonry work etc and will involve use of equipment like hoists, cranes, mixers, welding sets etc. There will be

169 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM dust, noise and gaseous pollution due to these works. The mechanical erection works involve extensive use of mechanical equipment for storage, retrieval and erection, site fabrication etc leading to some noise and air pollution. Since the construction of Service Reservoirs and Sump cum Pumps are going to be in the reserved site areas of Coimbatore Corporation, only the habitants surrounding the reserved site areas will be affected.

Environmental Management Plan - Construction Phase Impacts Time Frame Sl. Responsible Issues Action to be taken For No. Agencies Implementation Pre- construction Impacts Site clearance, a. Adequate precaution Prospective As per Flora and fauna against damage to existing Contractor Implementation structures, electricity and Schedule telephone lines and other infrastructure services

b. Site clearance will be Impact on Prospective As per done only in the area 1. vegetation Contractor Implementation required for the project. Schedule

c. A minimum level of tree plantation will be ensured. During the No important species are CCC period of present in the area. Construction of Project a. Site for storage of pipes, Before construction materials Commencement Storage of 2. and disposal of debris, CCC of the Project Materials refuse, etc. to be identified. Construction

Phase Impacts a. Noisy construction Prospective During the operations in residential Contractor period and sensitive areas should of Project be restricted between execution 7.30am to 6.00pm. -----do----- b. Provision of ear plugs to ------do------operators of heavy

machinery and workers in Air Pollution -----do----- 3. near vicinity and Vibrations ------do------c. Preventive maintenance of construction equipment and vehicles to meet -----do---- emission standards and to ------do------keep them with low noise. d. Provision for enclosing

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Time Frame Sl. Responsible Issues Action to be taken For No. Agencies Implementation generator and concrete mixers at site. Where residences are located within 200m from construction sites and in Prospective sensitive areas like Contractor hospitals, schools, zoological parks, etc. -----do----- Noisy construction work shall be undertaken during day time only -----do----- (7.30 hrs to 18.00 hrs) -----do----- e. Sound barriers in

inhabited areas shall be

installed during the

construction phase

f. During night, material, transport should be uniformly distributed to minimize noise impacts. g. Prior information to be provided if blasting is significant. Blasting to be in accordance with the Explosives Act 1984 and Explosive Rules 1983 Dust h. Unpaved haul roads near / contamination passing through Of Construction residential and During the Sites and along commercial Areas to be Prospective period 4. Haul roads watered thrice a day. Contractor of Project Trucks carrying Execution construction Material to be adequately covered. a. Ensure unobstructed Prospective During the natural drainage through Contractor period proper drainage of Project channels/structures -----do----- Execution ------do------b. Dispose surplus excavated -----do----- Earth Work earth at identified sites 5. ------do------Excavation c. Ensure minimum hindrance to normal local -----do----- activities and business ------do------d. Avoid damage to permanent structures a. Daily inspection at haul Construct During the Disposal of roads & sites for Management period 6. Construction construction debris for Consultant / of execution of debris safe collection & disposal the Project

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Time Frame Sl. Responsible Issues Action to be taken For No. Agencies Implementation to land fill sites. Prospective Contractor ------do------b. Collection and disposal of ------do------refuse c. Minimise construction debris by balancing cut & fill requirements a. Minimize interruptions to Construct During the utility services through Management Construction of proper planning & Consultant The Project scheduling of activities and inter-departmental coordination Prospective ------do------b. Construction of temporary 7. Social Disruption Contractor road/ access & diversion

to traffic.

c. Preference to local labour -----do------do------/ skilled persons during construction, operation & maintenance. a. Aesthetic enhancement Construct During the through proper house Management Construction of keeping of construction Consultant/ the Project sites Prospective Contractor b. Disposal of construction

wastes at the approved

disposal sites

c. Immediate closure of the trenches after pipe laying -----do------do------/ completion of work Aesthetic 8. d. Repair pavements impairment immediately following construction of pipeline -----do------do------and appurtenant structures e. Complete construction activity by removing all temporary structures, restoring the project and surrounding areas as near as possible to the pre- construction condition. a. Farm land and forest belts Construction During the shall not be used as Management Construction of Conservation of materials borrow sites Consultant the Project 9. Ecological b. Arable land shall not be resources selected as borrow sites to

the extent possible. If

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Time Frame Sl. Responsible Issues Action to be taken For No. Agencies Implementation excavation has to be done in arable land, topsoil -----do------do------layer (30cm) shall be saved and returned after construction work is completed, so as to minimize impacts on -----do------do------ecosystem, agriculture & animal husbandry. c. Education of construction workers shall be strengthened to protect national resources, wild plants & animals a. Planning of labour camps Prospective During needs to be done to Contractor Construction ensure adequate water Period Construction 10. Supply, sanitation & labour drainage, etc. in conformity with the Indian Labour laws. a. Procurement of Construct During Procurement of construction Material Management Construction 11. Construction only from permitted sites Consultant/ Period material and quarries Prospective Contractor a. Water supply line and Construction During feeder main route should ManagementConsultant/ Construction be realigned wherever Prospective Period possible to minimize tree Contractor felling.

b. Should not involve

resettlement -----do----- c. While crossing settlement ------do------Laying of or inhabited areas prone 12. Feeder mains to water logging, external casing to water mains is to be provided d. Feeder mains as far as possible, should be laid within right of way. e. Laying in encroached area (or) narrow is to be avoided a. Adequate precautions Construct During Laying of should be Management Construction Consultant/ Period 13. Distribution b. Taken while laying the Prospective System water supply Lines to Contractor avoid possibility of cross

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Time Frame Sl. Responsible Issues Action to be taken For No. Agencies Implementation connection with the sewer lines a. In order to guarantee Prospective During construction safety, Contractor Construction efficient lighting & safety Period signs shall be installed on temporary roads during construction and adequate traffic regulations shall be adopted and implemented -----do------do------for temporary roads

b. During construction, -----do------do------effective safety and

warming measures shall 14. Risk of accidents be adopted to reduce -----do------do------accidents. c. Provide temporary crossings / bridges wherever necessary to facilitate normal life and business. d. Where loose soil is met with, shoring and strutting shall be provided to avoid collapse of soil a. Use major roads to avoid Prospective During traffic congestion and Contractor/ execution insist on compliance by CCC of the Project the Contractor -----do----- b. Local construction ------do------materials, especially earth

and stones shall be used

as much as possible to

avoid long distance

transportation Traffic c. Adequate actions to direct Police / Traffic and and regulate traffic shall CCC ------do------15. Transportation be taken in consultation

with CCC to prevent traffic jamming of roads during construction period. While planning alternative routes, care to be taken to minimize congestion and negative impacts at sensitive Prospective receptors such as schools Contractor / CCC ------do------and hospitals. d. Traffic controls and

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Time Frame Sl. Responsible Issues Action to be taken For No. Agencies Implementation diversions marked with Prospective signs, lights and other Contractor measures (flags) should ------do------be provided

e. Prior to creating

diversions and detours the ------do----- citizens should be

consulted well in advance ------do------through citizens meetings. It should be an informed decision taken through public participation f. Diversion works to be dismantled to restore the area to original condition after completion of construction a. If fossils, coins, articles Prospective During the of value or antiquity, Contractor Construction of structures and other the Project remains of geologic or archeological interest are found, the local govt.shall be immediately informed 16. Cultural Relics of such discovery and excavation shall be stopped until identification of cultural relics by the authorized institution and clearance is given for proceeding with work a. Explore the possibility of Construct During Project reuse of back wash water Management Contractor Construction a. Prevent loss of Construct During Project Environmental Disinfectant and other Management Contractor Construction / 17. Pollution chemicals and ensure / Operation prescribed safety CCC measures for their storage, handling and application a. Implement a well-planned Construct During Programme on human Management Contractor execution resource Development and maintenance aimed at increasing The period 18. Other items competence and capabilities of Technical and administrative personnel at all levels.

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Environmental Management Plan - Operation Phase Impacts

Time Frame Sl. Responsible Issues Action to be taken for No. Agencies Implementation Influent and Effluent at the existing CCC During the life Water treatment plant of the project- Monitoring Parameters collect and analyze  SS monitoring frequency – samplesonce every Water Quality daily week Monitoring  Silver Ionisation Solution – weekly Take corrective 1.  Monitoring points – at the inlet action within a of treatment plant and treated CCC week effluent.  Complete physico-chemical Once a month. analysis including heavy Take corrective hardness, fluoride. Monitoring Action within a frequency: once a month week

Operation period: 4 times a year CCC During the life of Monitoring will be undertaken as the project. appropriate at the sump cum pump 4 times a year. 2. Noise monitoring arranegments Take corrective action in 3 months

2.10.11 Environmental Monitoring

The monitoring activity in the context of the project would be at three levels:

 Routine monitoring of the performance of the water supply system will be by the prospective contractor to ensure that the system is being operated and maintained in conformity with the applicable quality standards.

 Compliance monitoring by the Municipal Corporation/Project Monitoring Consultant to ensure that the proposed environmental management plan is being implemented. In the event of any violation of standards observed, it would be the responsibility of the Municipal Corporation/Prospective Consultant to ensure immediate rectification.

 Monitoring the trend in the performance of the project in terms of the services committed by the municipality to the beneficiaries as well as the environmental quality of the project area. This monitoring that would be done by Municipality will attempt to evaluate the extent of benefits that the consumers have accrued from the project. Additionally, if this monitoring reveals that any modifications are required in the project design to maximize the benefits, municipality would implement them.

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Institutional Arrangements required

 Having a Monitoring Agency to monitor environmental quality.  Review of outputs of the monitoring agency  Rationalise the environmental monitoring process.  Prepare Annual Environmental & Social Audit Report & Environmental Compliance Report.

Monitoring at this level would also be a form of disclosure monitoring used to keep the beneficiaries of the project informed about its progress.

Implementation of mitigation measures may also sometimes give rise to impacts, which will be recognized early if rigorous monitoring is ensured. The monitoring plan should also provide for periodic revision of the measures. The plan is described in following Table covers the monitoring requirements at all levels during operation phase. It provides the monitoring requirement for each impact/issue identified earlier and the responsible agencies.

Environmental Management Plan - Construction Phase Impacts

Sl. Responsible Monitoring Requirement Specifications No. Agency 1. a. Ambient air quality at six fixed SPM, Oxides of Nitrogen, CO, Coimbatore City stations to understand the Co2 Corporation impact of change in traffic pattern due to the project Coimbatore City b. Moving Station (1 no.) at the SPM, Oxides of Corporation construction site (only during Nitrogen, CO, Co2 construction period) to understand the impact of construction operations. Noise levels at the construction Fortnightly monitoring at 2 Coimbatore City 2. sites (only during construction locations, hourly basis for 24 Corporation period) hour period. Periodic inspection at Coimbatore City 3. Disposal of Construction Debris 2 locations on hourly basis for Corporation 24 hour period. Measures for diverting the traffic Coimbatore City during construction across Corporation (once 4. Traffic and Transportation district roads and roads within a week) the Municipal Corporation Domestic Sewage and refuse Check for adequacy of sanitation Coimbatore City 5. management at the labour camps arrangements at the labour Corporation (once a and construction sites camps week) Check for Coimbatore City a. blockage of flowing water Corporation (once 6. Water Pollution which may lead to stagnation in 15 days) of water

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Sl. Responsible Monitoring Requirement Specifications No. Agency b. soil erosion due to construction activities leading to contamination and siltation of water bodies c. water contamination due to use of fuel and lubricants at the construction sites Procurement from be only Project Procurement of construction 7. permitted sites Management material Consultant

Environmental Management Plan - Operation Phase Impacts Sl. Monitoring Requirement Specifications Responsible Agency No. a. Monitoring parameter: Chemical Coimbatore City Quality: Monitoring point - At Corporation outlet of MSR, SRs Water Quality at Service 1. reservoir b. Monitoring Frequency: 2 locations & 3 samples per location a. Monitoring Parameter: Coimbatore City Bacteriological quality & Corporation (once a Residual Chlorine - Monitoring week) Water Quality at Consumer 2. point: At receiving point of the end consumer b. Monitoring frequency: Weekly

2.10.12 Impact during Design Phase

The major impact associated with Design or Pre-construction phase deals with loss of land, loss of natural habitat, loss of properties and livelihood due to acquisition of properties. The design of alignment also decides the acquiring or impacting water-bodies, forest, cultural sites etc. The Design phase takes into account these issues along with environmental and social specialists to minimize the impact. Besides the impact on environment and social factors, other issues were also considered like legal issues and compliance norms, to facilitate the implementation process.

For the present project there will be no new requirement of land to be procured, as new service reservoirs, underground sumps etc., will be accommodated in the corporation land already available. New main pipeline will be in the same alignment as that of the existing ones, however the additional line for the distribution will be along the road where there is enough apron land. Desilting wastes will

178 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM also be used in bank strengthening as well as replenishing the top soil in the downstream. Thus new land acquirement will not be necessary.

2.10.13 Impact during Construction Phase

1) Land

 As no new possession of land is required there will not be any displacement or loss of livelihood for local population.

Potential Land Impact Issues

Activity Location Impact

Service Reservoirs Corporation Land No major impact Underground Sumps Corporation Land No major impact Pipe line laying Road side and vacant land No major impact

Mitigation Measures

Proper spraying of water in selected areas and proper storage, refilling and compaction of excavated soil can mitigate the impact. Workers should use mask or cover nose with cloth to reduce the impact of dust pollution. Also, the area where the excavation will be carried a 2 mts height separator will be erected.

2) Water Resources The other impact on water resources is the requirement of water for construction purpose. Water will also be required for dust suppression. Drinking water will be required for the workers working at the construction site. The water requirement for all these purposes may have an impact on local water resources and water availability for the local people. This can also have impact on water requirement for local domestic animals. The development process should take account of this water requirement and should arrange for that.

Potential Water Resources Impact Issues

Activity Location Impact

Service Reservoirs & All project locations Deposition of debris Underground Sumps

Pipeline laying Crossing drains, channels Depositing debris

Water requirement for All project locations Impact on local water Construction Work availability

Mitigation Measures

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Construction procedures will take care for management of debris. Project authority will arrange for excess water requirement beforehand to avoid any later crisis. Silt disposal will be planned and phased in the downstream channel.

3) Flora and Fauna

Since the project area lies well within the City limits of Coimbatore Corporation, there will not be any significant effect on vegetation and habitation. So construction will not cause any impact on flora there. Removal of these also for a few meters of wide corridor, would not cause any significant impact.

Mitigation Measures

All the trees removed in the exceptional cases, will be replaced by planting at least three times the number of trees cut. The project therefore will take some specific steps for ensuring ecological balance.

Fauna

Construction of intake well will cause some temporary impact on aquatic ecology. There will be some temporary impact on the wild fauna living on the shrub jungles on the reservoir & river bank and on fallow lands during construction work.

Potential Impact on Flora and Fauna

Activity Location Impact

Construction of Service Reservoirs Corporation reserved site Impact on flora.

Underground Sumps Corporation reserved site Impact on flora.

Pipeline laying Along Roadside Impact on flora.

4) Construction Workers’ Requirements

This activity covers the arrangement for housing and living requirements for the construction workers. There is a possibility that some of them will be coming from beyond immediate neighborhood. The contractor will be asked to provide suitable camps for their work force and make provision for insurance for any eventuality. If the construction workers stay near the site, they will be provided with safe drinking water and proper sanitation facilities. The workers will be provided with fuel in order to avoid cutting of trees in the neighborhood for their fuel need.

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2.10.14 Impact during Operation Phase

Operation of water collection, storage and supply will generate solid, liquid and gaseous effluents. Their impacts are discussed below.

1) Air Quality

During normal operation of water supply scheme, there will be no generation of gaseous effluents and thus no impact on air quality.

However if DG sets are used for emergency activities during power cut, then the impact on air quality should be considered. In that case proper height of exhaust, acoustic cover etc. as per acts will be followed.

2) Noise

Generally there will be no noise pollution during the water supply for the people outside. The DG set used for the emergency operation will be silent eco-generator sets.

3) Effluent generated from additional water supplied (Sewage contribution)

Under the scope of this project, there is expected to be an impact on the volume of waste water generated after implementation of the water supply augmentation works. The additional quantity of water to be supplied in future will trigger an additional load on the sewerage system and hence this will have to be factored in the proposed sewerage project.

Therefore, the sewerage infrastructure of the CCC has to be improved to meet the impact of the project water supply augmentation. A Sewerage project has been proposed which includes laying of sewer network, intermediate pumping stations and road restoration works. In addition to the above proposal, it is proposed to construct 100 Nos of Public toilets across various locations in the city units for enhancing the sanitation facilities.

Reuse of treated sewage effluent for irrigation purpose, financial resource generation from sewage by selling the sludge to farmers as manure, private sector participation in monitoring the sewage & effluent treatment units has been listed in the City Development Plan for Coimbatore.

2.10.15 Impact Identification Matrix

Relevant components of environment, which are likely to experience some impacts due to the project activities, have been identified above. Environmental parameters are broadly classified under two groups:

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1) Physical Environment

2) Biological Environment

The parameter selected for impact identification is site and project specific. Different parameters considered under the said groups are as follows:

Topography

Hydrology

Water Quality PHYSICAL ENVIRONMENT

Air Quality

Noise and

Flora

Fauna BIOLOGICAL ENVIRONMENT

Aquatic Life

The interaction between project activities (construction and operation phase) and environmental parameters described above are shown in the following table depicting Identification matrix. The matrix points out each activity and its impact on specific environmental parameters. This is a qualitative work and does not indicate quantitative impact. Some of the impacts are temporary and localized and some impacts have permanent effect.

Environmental Impact Matrix ECOLOGICAL PHYSICAL ENVIRONMEN ENVIRONMENT ACTIVITY T Air Water Noise Aquatic Topo graphy Hydro logy Qualit Flora Fauna Quality Ecology y Construction Phase Construction of Service X X X X Reservoirs Construction of Underground X X X X X Sumps Pipeline laying X X Construction Workers’ X X Requirement Operation- Phase Gaseous Effluent from X DG Set

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2.10.16 Environmental and Social Classification

As per environmental and social screening, this project is classified under S-3 category. The implication is that there are no households involved and the number of project affected persons (PAP) is nil. As per environmental categorization of urban infrastructure projects, water supply project fall under E-3 category.

2.10.17 Specialized Services for PMC and Quality Assurance

Typically, it is envisaged that the PMC works and associated components namely Capacity Building, Institutional Strengthening, IEC activities, Transaction costs will approximately work out to 5% of the total Project Cost. However on the ground level the project “may” require some further investigation on technical and institutional part during implementation phase. A special fund provision for this will be made in the budget.

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3 Project Cost

3.1 Basis of Costing

The cost estimate for the water supply improvement is prepared based on the following references:

 TWAD Schedule of Rates for the year 2014-2015

 Lead Statement and Rate Analysis of Coimbatore Corporation

3.2 Land acquisition / Site Development

Based on the data provided by the Coimbatore City Corporation, land availability for all the components are investigated and identified for availability. The land details such as survey number, extent of land available are furnished in Table No.2.51 Volume I (a), Report part of this DPR.

3.3 Physical Infrastructure Component Cost

A summary of the physical infrastructure component costs estimated for the proposed improvements is presented in Table No. 3.1 as below.

GENERAL COST ABSTRACT

Coimbatore Water Supply System - Revised Final DPR (Schedule of Rates 2016-2017)

Base Cost of the Sl Base Cost of the Description Project (Rs in No Project Lakhs) Feeder Mains, Sumps & Pump Room, Pumpsets & I Generators A. Feeder Mains 1 Pillur System Feeder Main I from Proposed MSR at Ramakrishnapuram to a) 26,57,43,583 2657.44 Proposed SR at Bharathi Nagar (Gravity) – 33.20 Kms Feeder Main II from Existing MSR at Ramakrsihnapuram to b) Proposed SR at Lakshmi Nagar Mill Colony (Gravity) – 34,03,22,554 3403.23 28.41 Kms Feeder Main III from Existing MSR at Ramakrishnapuram to c) 1,53,97,395 153.95 Proposed sump at Rakkatchi Garden (Gravity) – 2.37 Kms Feeder Main IV from Proposed Sump at Rakkatchi Garden to d) 4,05,24,788 405.25 Existing SR at Jai Nagar (Pumping) – 9.98 Kms 2 Siruvani System Feeder Main I - From Existing MSR at Bharathi Park to a) 12,50,49,275 1250.49 Proposed SR at Housing Unit (By Gravity) – 13.82 Kms Feeder Main II - From Existing MSR at Bharathi Park to b) Proposed Sump at Sanganur Chinthamani (By Gravity) – 2,06,33,654 206.34 1.36 Kms

184 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM

GENERAL COST ABSTRACT

Coimbatore Water Supply System - Revised Final DPR (Schedule of Rates 2016-2017) Feeder Main III - From Proposed Sump at Sanganur c) Chintamani to Existing SR at Revathi Layout (By Pumping) 2,52,53,203 252.53 – 7.53 Kms 3 Interlinking of MSR of Pillur & Siruvani System From Existing MSR at Ramakrishnapuram to Existing GLSR 12,55,42,325 1255.42 at Bharathi Park – 8.44 Kms Sub Total Rs in Lakhs (I - A) 95,84,66,777 9584.67 B. Sumps & Pump Rooms 1 Pillur System 10.00 LL Sump at Rakatchi Garden with Pump Room – 2 Nos ( 8m x 8m x 5m Size) with Ladder and Pipe Connection 1,14,43,476 114.43 Works 2 Siruvani System 7.00 LL Sump at Sanaganur Chinthamani with Pump Room - 1 No (8m x 8m x 5m Size) with Ladder and Pipe Connection 75,18,714 75.19 Works 3 Interlinking of MSR of Pillur & Siruvani System 10.00 LL Sump at Bharathi Park with Pump Room – 1 No (20m x 10m x 6m Size) for MSR Interlinking with Ladder 1,35,54,688 135.55 and Pipe Connection Works Sub Total Rs in Lakhs (I - B) 3,25,16,878 325.17 C. Pumpsets & Generators 1 Pillur System At Rakatchi Garden - 5640 Lpm x 27 m x 44 HP - Horizontal Split Case – 2 Nos (1W+1S) & 5460 Lpm x 49 m x 78 HP - 1,62,21,418 162.21 Horizontal Split Case – 3 Nos (2W+1S) & 200 KVA Diesel Generator Set 2 Siruvani System At Sanganur Chinthamani – 960 Lpm x 20 m x 6 HP – Submersible – 2 Nos (1W+1S) & 2580 Lpm x 27 m x 20 HP – Submersible – 2 Nos (1W +1S) & 4080 Lpm x 35 m x 42 95,39,146 95.39 HP – Horizontal Split Case – 3 Nos (2W +1S) & 80 KVA Diesel Generator Set 3 Interlinking of MSR Pillur & Siruvani System At Bharathi Park – 17400 Lpm x 24 m x 122 HP – Horizontal Split Case – 3 Nos (2W+1S) & 250 KVA Diesel Generator 1,36,22,880 136.23 Set Sub Total (I - C ) Rs in Lakhs 3,93,83,444 393.83 Sub Total (I) Rs in Lakhs = A + B + C 103,03,67,099 10303.67 II Distribution System & Special Components A. Distribution System 1 North Zone (27 Zones of 407 Kms) 45,50,88,712 4550.89 2 South Zone (15 Zones of 195 Kms) 25,25,29,718 2525.30 3 West Zone (28 Zones of 308 Kms) 47,35,40,931 4735.41 4 East/Demo Zone– I (8 Zones of 107 Kms) 15,42,84,727 1542.85 5 East/Demo Zone–II (23 Zones of 324 Kms) 40,48,57,964 4048.58 Sub Total (II - A) Rs in Lakhs 174,03,02,052 17403.02

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GENERAL COST ABSTRACT

Coimbatore Water Supply System - Revised Final DPR (Schedule of Rates 2016-2017)

B. Special Components Automatic Hand Held Meter Reading System (5 Nos – 1 No 1 for each Zone) & Data Collection Software (5 Nos – 1 No for 1,28,00,000 128.00 each Zone ) 2 Any Time Payment Machine (5 Nos – 1 No for each Zone) 25,87,500 25.88

Bulk Water Meter with Data Logger for Flow & Pressure 3 Measurment & Pressure Control Valve & Data Logger Room 27,10,52,694 2710.53 (101 Nos – 1 No for each D’System Sub Zone)

4 Gas Chlorination Disinfection (2 Sets – 1 No for each MSR) 1,08,32,756 108.33 House Service Connection Meters (75,000 Nos as AMR 5 117,81,97,500 117,81.98 Meters) Rider Mains of 90 Kms Length in all 5 Zones (23 Kms in 6 North Zone, 11 Kms in South, 30 Kms in West, 9 Kms in 2,92,61,141 292.61 East Zone I & 17 Kms in East Zone II) Sub Total (II - B) Rs in Lakhs 1504731591 15047.32 Sub Total (II) Rs in Lakhs = A + B 324,50,33,643 32450.34 III Service Reservoirs & Pipe Connections A. North Zone 20 LL – 15 m Staging Height – 2 Nos 5,54,64,208 554.64 20 LL – 12 m Staging Height – 1 No 2,36,00,026 236.00 18 LL – 15 m Staging Height – 2 Nos 5,39,58,926 539.59 9 LL – 15 m Staging Height – 2 Nos 2,56,77,792 256.78 7 LL – 15 m Staging Height – 1 No 1,03,07,351 103.07 Sub Total (IV - A) Rs in Lakhs 16,90,08,303 1690.08 B. South Zone 19 LL – 15 m Staging Height – 1 No 25,849,737 258.50 16 LL – 15m Staging Height – 2 Nos 51,613,019 516.13 12 LL – 15m Staging Height – 1 No 18,077,404 180.77 9 LL – 12 m Staging Height – 1 No 11,514,534 115.15 7 LL – 12 m Staging Height – 1 No 9,091,952 90.92 4 LL – 15 m Staging Height – 1 No 5,994,454 59.94 Sub Total (IV - B) Rs in Lakhs 122,141,100 1221.41 C. West Zone 20 LL – 15 m Staging Height – 2 Nos 5,36,91,137 536.91 20 LL – 12 m Staging Height – 1 No 2,53,36,645 253.37 18 LL – 15 m Staging Height – 1 No 2,77,71,681 277.72 12 LL – 15 m Staging Height – 1 No 17,771,613 177.72 Sub Total (IV - C) Rs in Lakhs 12,45,71,076 1245.71 D. East / Demo Zone I 18 LL – 12 m Staging Height – 1 No 2,48,52,448 248.52 Sub Total (IV - D) Rs in Lakhs 2,48,52,448 248.52

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E. East / Demo Zone II 20 LL – 15 m Staging Height – 1 No 2,66,56,322 266.56 13 LL – 12 m Staging Height – 1 No 1,61,72,314 161.72 11 LL – 15m Staging Height – 3 Nos 4,22,74,813 422.75 10 LL – 15m Staging Height – 2 Nos 2,53,22,119 253.22 4 LL – 15m Staging Height – 1 No 56,88,284 56.88 Sub Total (IV - E) Rs in Lakhs 11,61,13,852 1161.14 Sub Total (IV) Rs in Lakhs = A + B + C + D + E 55,66,86,779 5566.87 IV Common Components 1 Water Quality Test Laboratory & Equipments (1 No) 56,16,817 56.17 2 SCADA System for Monitoring (1 No) 7,53,72,000 753.72 Sub Total (III) Rs in Lakhs 8,09,88,817 809.89 Project Sub Total Rs in Lakhs = I + II + III + IV 491,30,76,338 49130.76 Project Management Consultancy Cost 16,21,00,000 1621.00 Physical Contingencies at 3% on Project Sub Total 14,73,92,290 1473.92 Project escalation cost for 3 years LS 31,85,65,990 3185.66 Administrative Charges at 0.5 % on Project Sub Total 2,45,65,382 245.65 Total Project Cost Rs 556,57,00,000 55657.00 Lakhs Total Project Cost Say Rs 556,57,00,000 556.57 Crores

3.4 Rehabilitation & Resettlement Cost

Out of the activities listed above, construction of sump cum pump houses, service reservoirs will be at the reserved sites of the Coimbatore Corporation. Hence there is no land acquisition envisaged. Thus, re-settlement and re-habilitation is not foreseen. Distribution mains are generally laid along the roadside in the town and hence there is no rehabilitation and resettlement involved in this also.The cost of road crossing and railway crossing is factored in the cost components.

3.5 Project Costing

Project Cost has been estimated based on 2013-2014 Schedule of Rates.The total project Cost of the water supply improvements is presented in Section 3.4 as above. The Detailed Estimates, Cost Abstracts of the designed components and Rate Analysis has been furnished in Volume IV, part of this DPR

Annual Operation and Maintenance Costs

The annual Operation and Maintenance cost for the project is estimated under the following expenditure heads:

 Establishment Charges  Energy Charges and  Repairs / Renewals including Consumables like chemicals, etc.,

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 Maintenance expenses incurred by components like ATP Machine, etc.,

Establishment charges are calculated based on the staff strength required as per the norms stipulated in the CPHEEO manual for water supply and furnished as below in Table No. 3.2

Staff Pattern (as per CPHEEO Norms) (Only for Distribution System) Sl Num Category of Staff CPHEEO Norms No bers 1 Valve Operator for 2 MSR (2 Nos) 4 Nos 2 x 2 shift Supervisor / Asst Manager - Pillur 2 Mains I, II,III & IV and Siruvani 7 Nos 1 No for each network Mains I, II, III Fitters for Pumping main 3 Pillur - 9.98 Km & Siruvani - 7.53 6 Nos 2 nos for every 6 km Km Fitters for Gravity main Pillur - 63.98 Km & Siruvani - 15.19 29 2 nos for every 6 km Km Nos MSR Interlinking - 8.44 Km Fitters for MSR & Sump cum 8 Nos 4 x 2 shift pumping arrangements Electrician / Mechanic (2 MSR + 2 4 Pump cum sumping - 1 for MSR + 1 4 Nos 2 x 2 shift for PS) Helpers (Mazdoor category grade I) 101 5 1 no for each zone for Distribution system (101 zones) Nos Watchman for Service reservoir (63 126 6 1 no x 2 shift Nos) Nos Watchman for MSR (2 MSR - 12 hr 4 Nos 1 no x 2 shift shift - 2 shifts/day) Billing & Collection of water charges One for every 500 connection to be read 7 a) Water Meter Reader to read 1.5 300 monthly or a minimum of one if less than Lakhs Connection Nos 500 connection (includes leave reserve / shift duty also) c) Water rate collectors to collect 100 One for every 1500 monthly billed 8 rates for 1.5 Lakhs Connection Nos connections d) Water rate superintendent for 1.5 25 One for every 6000 billed connection 9 Lakhs Connection Nos monthly e) Meter repairer (assuming 5% of 94 One for every 80 meters per month to be 10 meters fails per month = 150000 x Nos repaired 0.05 = 7500 nos) 94 One for every 80 meters per month to be 11 f) Assistant meter repairer Nos repaired 12 Water Analyst (Chemical) 1 Nos 13 Water Analyst (Bacteriological) 1 Nos 14 Laboratory Technician 3 Nos 15 Typist cum Clerk 1 Nos 16 Water Sample Takers 3 Nos 17 Laboratory Cleaners 3 Nos SCADA Operators (Techncial) for 18 3 Nos 1 x 3 shifts entire Scheme at Central Control

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Staff Pattern (as per CPHEEO Norms) (Only for Distribution System) Sl Num Category of Staff CPHEEO Norms No bers room Cost for O&M including establishment charges as per norms listed above, electrical energy charges including KVA charges and meter rent, cost of fuel required for DG sets, repair and renewal charges, cost of chemicals / disinfection unit, cost for maintaining SCADA equipments, Any Time Payment Machines, etc., are arrived at Total O&M cost which works out to Rs 38.69 Crores per annum. This works out to 8.06% of the total installation cost of Rs. 479.64 Crores. Item wise break up is listed in Table No.3.3

Table No. 3.3 - Abstract Cost of O&M per Annum (D’System Only)

Sl No Description Amount (Rs) 1 Cost of Establishment 93,907,383 2 Cost of Electrical Energy 275,073,043 3 Cost of Diesel for DG Set 8,244,000 4 Cost for Gas Chlorine Disinfection unit 5,862,724 5 O & M for SCADA System 753,720 6 O & M for ATP Machines 3,105,000 Total (per annum) for 290 MLD 386,945,870 Say (per annum) for 290 MLD 3869.46 Lakhs Say Rs per KL per annum 1334.296 Say Rs per KL per day 3.66

3.6 Institutional Strengthening

The strength and weakness of each of the staff working in the CCC for O & M, are reviewed with reference to their experience and level of skills required to ensure effective O&M of the system. As there is enough scope for further improvements, it is suggested to impart regular refresher programmes at all levels so that the staff concerned can unlearn the misconception and relearn the required skills to perform better.

3.6.1 Training to be imparted

Existing / Proposed staff in the CCC needs to be educated / trained in the following fields

1. Training on supervisory control and project management for the work of the execution of water supply components such as feeder mains, pumping mains, master balancing reservoirs, service reservoirs, distribution system & other related civil construction activities. 2. Effective O & M practices for a water supply project 3. Preventive and regular maintenance of pumps, valves, equipments and instrumentation provided in the system.

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4. Preventive measures for corrosion related issues of water mains. 5. Communication & Public relations. 6. Training to handle field kits for testing of water quality. 7. Training for Fitters / field workers to provide new house service connections with MDPE pipes and electro fusion saddle pieces. 8. Training for field staff in maintenance of the water supply distribution net works with equitable pressures and design concepts for extension of distribution networks. 9. Training for handling leak detection equipments and SCADA. 10. Training for handling special equipments like Automatic Meter Reading (AMR) system, Any Time Payment (ATP) machine, Water meter test bench, Automatic Pressure Management System (PMS), Billing & Collection software systems, etc.,

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4 Project Institution Framework

4.1 Roles of Different Institutions

Fulfillment of the objective of increased hours of water supply with high level of consumer satisfaction calls for substantial capital investment with legal covenants on the rehabilitation of distribution system including service lines and consumer metering, preparation of accurate network maps and data bases, installation of state of the art computer hardware and software etc. (to integrate water demand assessment, asset management, consumer billing, day to day O&M, Costumer Relation Management etc.) It also calls for highly efficient and focused management of complete water supply distribution system that would ensure non-revenue water to be within desired limits and delivery of water to consumers at the lowest unit cost. With the present organizational set up and skill levels available with the O&M staff, managing an efficient service delivery for the water supply system departmentally and to achieve the target of continuous water supply within specified time frame and at lowest costs will be difficult.

Therefore, the private sector’s involvement in Water Supply service delivery system is imperative to create a synergistic situation with the objective to provide better service to the consumer and cover all section of the society, by rational tariff structure. We propose Private Sector involvement to seek investment in

 Refurbishment / Management of the Distribution Network for improved system performance.

Within the provisions of public-private-partnership mechanisms, it becomes imperative to identify the roles of various stakeholders in the development particularly with respect to design, construction, development, financing and maintenance of the project.

The Project construction is envisaged to be carried out on Public-Private Partnership model both by being tendered out under the supervision/management of the ULB and also through a separately established legal entity/project implementation company such as an SPV (Special Purpose Vehicle) if required.

This project implementation is envisaged to be governed through specific transaction framework, which shall involve:

(a) Devolution of responsibility to the relevant entity in order to engineer, detail design, construct, implement, operate & maintain the project in the holistic way.

1. Ensure contractors capability to deliver in terms of construction & operations management

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2. Setting up of framework to ensure that contractor functions as per committed performance requirements for the project within the legal system.

3. Balancing public and private interests for infrastructure provision, fund availability and project implementation to bring capital efficiency.

4.2 Roles and Responsibility Matrix

4.2.1 Role of the Government of Tamilnadu (GoTN)

The main role envisaged for Government of Tamil Nadu would be to provide financial assistance of 20% for the project implementation, inter-alia, other necessary facilitation from other relevant Central and State agencies such as the Railways, Roads, Water resource development authority etc. Thus, the State government is expected to act as an enabler to this project development and having supervising authority being stakeholder.

4.2.2 Role of the Coimbatore Water Supply Sector

The role of water sector is to act as an enabler in bringing different agencies involved in the service delivery to a common platform and ensure efficiency and financial viability of the agencies in the water supply system. Also, delegating to the private sector the responsibility for time-bound, qualitative and efficient project implementation. They would also be the prime body dealing in necessary co-ordination/ facilitation as required between various departments such as numerous utilities that co-exist in the project influence area etc.

The water sector is envisaged to operationalize the Special Purpose Vehicle (SPV) and will have full control over the functioning of the SPV including the operationalization of the Escrow Account.

The key functions of the water sector in the corporation can be broadly categorized into two, namely,

1) Strategic Functions

2) Operational Functions

1. Strategic Functions

 To set tariffs according to general policy rules and contractual terms;

 Environment regulation for the Integrated management of water resources in the Corporation Area;

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 Finalization of the terms and conditions of the different contractual arrangements for service delivery of Water;

 To enter into Contractual/Concession Agreements with SPV;

 Formulation of the SPV’s and decide on their Equity Holding Patterns;

 Activation of the Escrow Account if necessary;

 To regulate all investment Decisions;

Operational Functions

 To set and enforce service quality standards;

 To monitor and enforce drinking water standards;

 To deal with customer complaints;

 To regulate bulk supply agreements, if they exist;

4.2.3 Role of the Coimbatore City Corporation (CCC)

The Coimbatore City Corporation (CCC) is envisaged with the role of the “Owner” of the project, with 30% of the Financing to be sourced from and private sector involvement through BLT mechanism under PPP. It will be the responsibility of the Private operator for the efficient project implementation as well as meeting different performance indicators e.g Quality, Delivery, Productivity etc. CCC is also expected to put in place necessary processes required for public awareness and participation in order to ensure minimum disruption of normal life of the public while the water supply augmentation activities are being carried out including setting up of help desks etc. A program related to IEC will be initiated for generation of public awareness.

Here it is pertinent to note that the project will be implemnted by the PMC company which will ensure the qulity and timely implementation of the project. After the completion of the project the Management Contractor will take over the project for the day today operation of the Water Distribution System.

4.3 Overall Financial Structuring of the Project

As per the guidelines of JNNURM, cities having population between 1 - 4 Million would get 50% grant from Central Government. 20% grant from the State Government and the rest 30% have to arranged by ULBs through various sources as Devolved Funds, surplus resources, Debt/ Term Loan or Private Equity/ Community Funding etc.

Accordingly for the Coimbatore City Corporation with more than 1 Million Population, the City is eligible for receiving 50% of project implementation cost as grant from the Central Government

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Funds. Further, the State Government of TamilNadu shall ensure 20% of funds towards its contribution. Coimbatore City Corporation shall arrange the rest 30% of funds through PPP by strategically entering into agreement with the private player.

Cost estimates for Re-structuring of existing water supply system comprising replacement of existing distribution mains and replacement of pumps and accessories and Augmentation works for the water supply reveal that the project requires an investment of 479.64 Crores during the two subsequent financial years. It includes the cost of construction, consultancy services during design and quality assurance/ supervision charges during construction period, cost of civil works and the cost of shifting/crossing the utilities.

Based on the availability of funds from various sources for implementing the proposed Coimbatore Water Supply Scheme, following financial structuring is evolved for the project.

Overall Financial Structuring of the Project

% % share Remarks on when Project Amount share by and how state and SN Govt. Contribution (in Rs. by specific ULB shares would be Source Crores) govt. source arranged entity

1. Central ACA Grant 278.29 50% 50% Not Applicable

Grant towards its After the approval of 2. share in the project the Project the Govt. of Tamil Nadu will take State 111.31 20% 20% Loan taken by state expeditious action for 3. Govt. towards its allocating the share in project necessary funds

If necessary loan will Private equity/ be taken from 4. ULB community resource 166.97 30% - government financial funding; others institutions

Total Project 556.57 100%

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5 Project O&M Planning

5.1 Institution Framework (Organization & Operations) Strategy

In the CCC administered area, it is proposed that the different type of PPP framework will be used for bridging the financing gap as well as managerial skill. The detail of the institutional framework as well as the operational module has been discussed in detail in chapter 5. The further refinement of the O&M process will be developed during the implementation phase but the basic feature will remain the same and will follow the roadmap illustrated as per CPHEEO norms. However for clarity the O&M Plan is discussed in detail, which is as follows.

5.2 Selection of O&M Operator

It is diligent to deploy a Management Contract Operator to maintain the assets related to Water Supply more fully discussed in Chapter-5 of this DPR. It will be responsibility of the Operator to design an efficient operation and maintenance mechanism to achieve the desired level of efficiency and service delivery during the contract period. In the context of this project, the ambit of O&M framework commences from the time the Project is commissioned. Besides a responsibility of an Operator who will have a dedicated O&M load, there are as set of responsibilities vested on the part of the CCC on preventive and regular maintenance aspects which will have an impact on the service delivery levels.

5.2.1 Preventive Maintenance

Preventive maintenance of a water supply system is a set of activities that are to be performed on a regular basis. This has a marginal bearing on the initial project cost, but will result in economical maintenance of the system over the project life. In the water distribution network for CCC area, proper maintenance will enhance the serviceability of the life of water mains and appurtenances which in turn will assure regular and uninterrupted water supply to consumers. The capital cost to be incurred in this proposed project for both rehabilitation works and augmentation of new system should have an appropriate O&M framework in place including both capacity and institutional related issues.

Maintenance issues in pipelines differ from place to place depending on the conditions encountered. Selection of suitable pipe material and periodical maintenance is essential to ensure that the public receives protected water supply at the most economical rate with minimum breakdowns. This shall ultimately manifest itself as consumer satisfaction. Following are some of the important points to be considered while planning based on the CPHEEO guidelines:

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 Annual Periodic inspection of mechanical / electrical equipment such as pumps, valves, capacitors, voltage stabilizers for trouble-free operation and optimum performance.

 Materials of superior quality shall be examined and implemented accordingly – A log of such reports has to be documented and archived for evolving a proper Database Management Mechanism.

 Newly laid mains shall be regularly tested (The period and interval of testing has to be evolved in consultation with the Operator to be hired)

 Corrosion control measures shall be deployed at periodic intervals and the equipments and appurtenances shall be inspected and coated with Anti-corrosive paints/chemicals.

 A leak detection survey shall be performed at periodic intervals.

 Ducts shall be provided across streets to permit laying of additional mains, if required

 Provisions of stubs (short length mains) to accommodate a group of ferrule connections

 Use of equipment like submersible dewatering pumps, cutting machines, pressure cutting machines, pipe detectors, leak detectors, lighting sets, butterfly valves etc.

 Preparation of manuals' with details of mains, valves, hydrants, etc. within a ward/ zone

 Maintaining emergency labour teams to work on Sundays and holidays

 Liaison with other utilities for proper work co-ordination and reduced interference

 Adequate staff training

 System of information dissemination to consumers on possible disruption in supply

 Breakdown / Emergency Maintenance

 In case of a damage (pipe burst) resulting on a branch main, the following operational sequence shall be adopted:

 Labour workforce (skilled & unskilled) shall be mobilised and required materials shall be assimilated and the team shall be directed to the breakdown site.

 Main control stations, senior officers concerned with maintenance and distribution shall be informed of the situation and kept updated on progress.

 The concerned control office shall be intimated to isolate the damaged main and alternative supply arrangements (if possible tankers) shall be deployed into action.

 Utilities such as Gas, Electricity and Telephones shall be informed on the breakdown and request them to be present at site to ensure contractor co-ordination.

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 Isolation of the water main by closing sluice values on both the sides. This will have to be done if the pipe is damaged severely (pipeline burst).

5.2.2 Quality of Materials

The water supply system will work without (or with very minimal) interruption if procured materials such as pipes and appurtenances are of good and standard quality. It is therefore necessary to use standard materials of approved make and establish procedures right from procurement of materials to installation, testing and commissioning.

Pipes procured shall be subjected to hydraulic pressure tests as specified in IS:1536. If the testing facility does not exist, a manufacturer's test certificate shall be insisted obtained and filed for reference. Manufacturers shall test pipes in the presence of the representative of CCC and submit a test certificate while delivering the pipes. Valves, hydrants and other appurtenances shall be tested prior to installation. It is recommended to invest more in procuring good quality materials rather than purchasing inferior materials and then incur high maintenance expenditure.

5.2.3 Maintenance of Service Reservoirs

Important aspects to be considered in the maintenance of service reservoir are:

 Measurement of inflows / outflows: Supply and Discharge flows shall be measured to ensure that they tally. Level and flow indicators/ recorders shall be functional

 Structural leakage: All structural damages and leak shall be promptly repaired

 External Pollution: Manhole openings, ventilation shafts and overflow pipes shall be adequately protected and checked periodically to prevent any contaminant infiltration

 General cleanliness in and around the service reservoirs should be maintained

 A garden around the service reservoir may be provided for aesthetic reasons

 A program to clean the service reservoir at least twice in a year shall be undertaken during non- supply times or a facility to by-pass the water supply shall be in place

 Appropriate safety measures to prevent entry of unauthorized persons shall be provided

 All guide and handrails shall be maintained in a safe and firm condition

5.2.4 Maintenance of Water Distribution System

Conveyance and water distribution are items that involve substantial expenditure in a large water supply scheme. For effective maintenance, the entire water distribution system shall be divided into sub-zones served preferably from one elevated service reservoir. Operation and Maintenance of the

197 Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM water distribution system should be entrusted to at least a Junior Engineer who shall be the authorised official of the controlling authority to receive and deal with complaints. Appropriate registers shall be maintained to record complaints and track follow up action to ensure that the complaint is addressed. If the complaint is such that it cannot be dealt with at his level, the Junior Engineer shall promptly refer the matter to a higher authority and also intimate the action taken to the complaint. Frequent vigilance checks in areas receiving maximum complaints shall be made an essential part of the supervisory staff’s daily schedule of duties.

5.2.5 Duration and quantity of supply

Duration of the supply is 24 hours and the quantity proposed is 135 lpcd.

5.2.6 Quality of water received by household

Quality of water will be satisfying the water quality specified as per IS with proper disinfection.

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