Kirulapone Sewer Network Development Work
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Initial Environmental Examination Document stage: Final Project Number: 45148-008 December 2015 SRI: Greater Colombo Water and Wastewater Management Improvement Investment Program (Tranche 3) – Kirulapone Sewer Network Development Work This report was prepared by Government of Sri Lanka for the Asian Development Bank. This document is made publicly available in accordance with ADB’s Access to Information Policy and does not necessarily reflect the views of ADB. This initial environmental examination is a document of the borrower. The views expressed herein do not necessarily represent those of ADB's Board of Directors, Management, or staff, and may be preliminary in nature. Your attention is directed to the “terms of use” section of this website. In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgments as to the legal or other status of any territory or area. GREATER COLOMBO WASTEWATER MANAGEMENT PROJECT (GCWMP) INITIAL ENVIRONMENTAL EXAMINATION (IEE) FOR KIRULAPONE SEWER NETWORK DEVELOPMENT WORK FINAL REPORT DECEMBER 2015 Prepared by , Submitted to, EML Consultants (Pvt) ltd Central Environmental Authority Initial Environmental Examination for Kirulapone Sewer Network Development Work Table of Contents 1 INTRODUCTION ............................................................................................................. 1 1.1 Objectives and Justification of the project .................................................................. 4 1.2 Objectives of the IEE report ........................................................................................ 5 2 POLICY, LEGAL AND LEGISLATIVE FRAMEWORK .............................................. 8 2.1 Zoning Requirements .................................................................................................. 8 2.2 Approving government authorities.............................................................................. 9 2.3 Legislative and National Policy Requirements ........................................................... 9 2.4 ADB Policies with reference to Environmental Assessments (EAs) ........................ 12 2.4.1 Environmental Management Plans (EMP) under ADB policies ....................... 13 2.4.2 Public Disclosure under ADB policies .............................................................. 14 2.5 Gap analysis between national/local and ADB requirements ................................... 17 2.6 Approvals needed for the project from other state agencies ..................................... 19 3 DESCRIPTION OF THE PROPOSED PROJECT ......................................................... 21 3.1 The Study Area/Project Location .............................................................................. 21 3.2 Location maps/ photographs ..................................................................................... 22 3.3 Existing Condition of Sewer Collection System ....................................................... 31 3.4 Proposed Components ............................................................................................... 31 3.5 Implementation Schedule .......................................................................................... 38 3.6 Project implementation ............................................................................................. 40 3.6.1 Pre-construction activities .................................................................................. 40 3.6.2 Construction activities ....................................................................................... 41 3.6.3 Operational and maintenance (O&M) activities and procedures ....................... 47 3.7 Resources/ facilities required/ provided .................................................................... 47 3.8 Work force................................................................................................................. 47 4 DESCRIPTION OF THE ENVIRONMENT (BASELINE DATA) ............................... 49 4.1 Physical Environment ............................................................................................... 49 4.1.1 Topography ........................................................................................................ 50 4.1.2 Hydrology and Drainage .................................................................................... 52 4.1.3 Climatic Conditions ........................................................................................... 53 ii EML Consultants Initial Environmental Examination for Kirulapone Sewer Network Development Work 4.1.4 Land Use ............................................................................................................ 55 4.1.5 Air Quality, Noise, Vibration............................................................................. 55 4.2 Biodiversity ............................................................................................................... 58 4.2.1 Present Status of Fauna and Flora in the Study Area ......................................... 58 4.2.2 Flora and Fauna in the Study Area .................................................................... 58 4.2.3 Existing Natural Habitat with the Ecology of the Ecosystems .......................... 65 4.3 Physical and Cultural Heritage .................................................................................. 65 4.4 Human, Economic and Socio Cultural ...................................................................... 65 4.4.1 Existing economic activities .............................................................................. 65 4.4.2 Existing infrastructure facilities ......................................................................... 66 4.4.3 Existing environmental considerations problems or issues prevailing in the area ............................................................................................................................ 66 5 ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES............................ 68 5.1 Design Phase ............................................................................................................. 68 5.2 Construction Phase .................................................................................................... 69 5.2.1 Pre-construction ................................................................................................. 69 5.2.2 Construction Phase............................................................................................. 70 5.2.3 Post-construction................................................................................................ 91 5.3 Operations and Maintenance Phase........................................................................... 92 5.4 Any other impacts not listed here but may be significant in view of the project proponent ..................................................................................................................... 96 6 INFORMATION DISCLOSURE, CONSULTATION, AND PARTICIPATION ....... 100 7 GRIEVANCE REDRESS MECHANISM (GRM) ........................................................ 103 8 ENVIRONMENTAL MANAGEMENT PLAN............................................................ 107 8.1 Environmental Management Plans (EMP) .............................................................. 107 8.2 Safeguard Implementation Arrangement ................................................................ 108 8.3 Summary of significant environmental impacts together with mitigation measures .... ................................................................................................................................. 108 8.4 Monitoring and reporting ........................................................................................ 120 8.5 Cost.......................................................................................................................... 135 9 CONCLUSION AND RECOMMENDATIONS .......................................................... 136 iii EML Consultants Initial Environmental Examination for Kirulapone Sewer Network Development Work List of Figures Figure 1-1 Project Area with the 3 wards ............................................................................ 3 Figure 2-1 Canal reservations .............................................................................................. 8 Figure 2-2 Proposed Elevated Highway starting from Kirulapone ................................... 17 Figure 3-1 Unsewered areas of Kirulapone and the locations of 2 housing schemes proposed by the UDA ...................................................................................... 21 Figure 3-2 Location of the pumping station (PS) at Kalinga Mawatha ............................. 23 Figure 3-3 Layout plan of the Kalinga Mawatha pumping station .................................... 24 Figure 3-4 Plan view of the Kalinga Mawatha pumping station ....................................... 25 Figure 3-5 Side view of the Kalinga Mawatha pumping station ....................................... 25 Figure 3-6 Location of the pumping station (PS) at Siddhartha Mawatha -Pamankada ... 27 Figure 3-7 Layout plan of the Pamankade pumping station .............................................. 28 Figure 3-8 Plan view of the Pamankade pumping station ................................................