Environmental Impact Assessment (ESIA) (including Cumulative Impact Assessment) and Resettlement Action Plan (RAP) for Proposed Construction of Kariminu II Dam Contract No.: AWSB/GoK/KR-01/2015 ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT STUDY REPORT Aquaclean Services Limited Firm Expert (NEMA Reg. No. 1899) P. O. Box 1902 – 00100, ▪Environment Experts ▪Engineering Studies & NAIROBI Design ▪ Construction Management ▪ Tel.: 020 2723203. Cell: 0722 809026 E-mail: [email protected], June 2016 Environmental Impact Assessment (ESIA) (including Cumulative Impact Assessment) and Resettlement Action Plan (RAP) for Proposed Construction of Kariminu II Dam (Kiambu County) ESIA Study Report Proponent: Athi Water Services Board Activity: Preparation of Environmental Impact Assessment (ESIA) Study Report (including Cumulative Impact Assessment) and Resettlement Action Plan (RAP) for Proposed Construction of Kariminu II Dam Report Title: Environmental and Social Impact Assessment (Draft Study Report) Name and Address of EIA Expert/Firm of Experts: Aquaclean Services Limited Firm of Experts/Associate Consultant P. O. Box 1902 – 00100, Nairobi, Kenya Email: [email protected]; Tel. + 254 722 809 026 NEMA Registration No. 1899 Signed: ________________________________ Date: ________________ Mr. Harrison W. Ngirigacha (MSc. WERM, BSc. Chem. NEMA Reg.) Lead EIA Expert (NEMA Reg. No. 027) Name and Address of Proponent: The Chief Executive Officer, Athi Water Services Board, Africa Re-Centre, 3rd Floor, Hospital Road, Nairobi, Kenya Signed: ____________________________ Date: _____________________ Athi Water Services Board Consultant: Aquaclean Services Limited 1 Environmental Impact Assessment (ESIA) (including Cumulative Impact Assessment) and Resettlement Action Plan (RAP) for Proposed Construction of Kariminu II Dam (Kiambu County) ESIA Study Report TABLE OF CONTENTS NON-TECHNICAL SUMMARY .................................................................................................................................. 7 CHAPTER 1: INTRODUCTION .............................................................................................................................. 16 1.1 BACKGROUND .................................................................................................................................................. 16 1.2 JUSTIFICATION FOR PROPOSED KARIMINU DAM ...................................................................................................... 18 1.3 THE PROJECT ................................................................................................................................................... 18 1.4 THE ESIA STUDY .............................................................................................................................................. 19 1.4.1 ESIA Terms of Reference ...................................................................................................................... 19 1.4.2 ESIA Objectives and Scope of Work...................................................................................................... 20 1.5 ESIA APPROACH .............................................................................................................................................. 20 1.5.1 Scoping Process .................................................................................................................................... 21 1.5.2 Documentary Review .......................................................................................................................... 23 1.5.3 Field Assessment .................................................................................................................................. 23 1.5.4 Detailed ESIA Study Activities .............................................................................................................. 23 1.6 RAP STUDY APPROACH ..................................................................................................................................... 24 1.6.1 Principle ............................................................................................................................................... 24 1.6.2 RAP Objective ....................................................................................................................................... 24 1.6.3 RAP Scope ............................................................................................................................................ 25 1.7 PUBLIC CONSULTATIONS .................................................................................................................................... 25 1.8 REPORTING...................................................................................................................................................... 26 1.9 STUDY EXPERTS ................................................................................................................................................ 26 CHAPTER 2: PROJECT DESCRIPTION ................................................................................................................... 27 2.1 PROJECT HISTORY ............................................................................................................................................. 27 2.2 PROJECT COMPONENTS LOCATION ....................................................................................................................... 27 2.2.1 The Dam ............................................................................................................................................... 27 2.2.2 Water Treatment Works ...................................................................................................................... 28 2.2.3 Water Transmission Pipeline ............................................................................................................... 28 2.2.4 Treated Water Storage Tanks .............................................................................................................. 29 2.3 THE PROPONENT AND KEY STAKEHOLDERS ............................................................................................................ 30 2.4 PROJECT AREA DESCRIPTION ............................................................................................................................... 31 2.4.1 Catchment Area Upstream of the Dam................................................................................................ 31 2.4.2 Dam Site and Buffer Areas ................................................................................................................... 31 2.4.3 Area to be Served and the Adjoining Land ........................................................................................... 33 2.4.4 Downstream of the Dam ...................................................................................................................... 34 2.4.5 Water Transmission Corridor ............................................................................................................... 34 2.5 ANALYSIS OF PROJECT ALTERNATIVES ................................................................................................................... 36 2.5.1 Dam Site Selection Criteria ................................................................................................................... 36 2.5.2 Site Selection ........................................................................................................................................ 36 2.5.3 Selected Option .................................................................................................................................... 37 2.5.4 Transmission Pipeline........................................................................................................................... 38 2.6 DESIGN CONCEPTS ............................................................................................................................................ 38 2.6.1 Basic Consideration .............................................................................................................................. 38 2.6.2 Dam Location and Components ........................................................................................................... 39 2.6.3 Water Treatment Works ...................................................................................................................... 41 2.6.4 Water Transmission Pipeline and Reservoirs ....................................................................................... 42 2.6.5 Water Use Options ............................................................................................................................... 43 2.7 PROJECT ACTIVITIES .......................................................................................................................................... 44 2.7.1 Planning and Feasibility Studies ........................................................................................................... 44 Page | 1 Athi Water Services Board Consultant: Aquaclean Services Limited Environmental Impact Assessment (ESIA) (including Cumulative Impact Assessment) and Resettlement Action Plan (RAP) for Proposed Construction of Kariminu II Dam (Kiambu County) ESIA Study Report 2.7.2 Design Work ........................................................................................................................................