Feasibility Study, Preliminary and Final Designs, Environmental and Social Impact Assessment and Preparation of Tender Documents for the Proposed Londiani Dam Water Project Table of Contents LIST OF TABLES .................................................................................................................................................................... V LIST OF FIGURES .................................................................................................................................................................. VI ACRONYMS ........................................................................................................................................................................... VII NON-TECHNICAL SUMMARY ............................................................................................................................................... IX CHAPTER 1: INTRODUCTION ........................................................................................................................................ 1 1.1 BACKGROUND ............................................................................................................................................................ 1 1.2 PROJECT JUSTIFICATION ............................................................................................................................................. 2 1.3 THE PROJECT ............................................................................................................................................................ 2 1.3.1 The Dam Site .................................................................................................................................................. 2 1.3.2 Transmission pipelines ................................................................................................................................... 2 1.3.3 Storage Tanks ................................................................................................................................................ 3 1.4 THE ESIA STUDY ....................................................................................................................................................... 4 1.4.1 ESIA Terms of Reference ............................................................................................................................... 4 1.4.2 ESIA Scope of Work and Objective ................................................................................................................ 4 1.5 ESIA APPROACH ........................................................................................................................................................ 5 1.5.1 Scoping Process ............................................................................................................................................. 5 1.5.2 Documentary Review ..................................................................................................................................... 7 1.5.3 Field Assessment ........................................................................................................................................... 7 1.5.4 Detailed ESIA Study Activities ........................................................................................................................ 7 1.6 STAKEHOLDERS AND PUBLIC CONSULTATIONS .............................................................................................................. 8 1.7 REPORTING ................................................................................................................................................................ 8 1.8 STUDY EXPERTS ........................................................................................................................................................ 8 CHAPTER 2: PROJECT DESCRIPTION......................................................................................................................... 9 2.1 PROJECT HISTORY ..................................................................................................................................................... 9 2.2 PROJECT COMPONENTS LOCATION .............................................................................................................................. 9 2.2.1 The Dam ......................................................................................................................................................... 9 2.2.2 Water Treatment Works ................................................................................................................................. 9 2.2.3 Water Transmission Pipeline ........................................................................................................................ 10 2.2.4 Treated Water Storage Tanks ...................................................................................................................... 11 2.2.4.1 Gravity Main 1 (Masaita Tank – Londiani –Kedowa – Chepseon) .............................................................. 12 2.2.4.2 Gravity Main 2 (Treatment Works – Kipkelion – Fort Ternan) ..................................................................... 12 2.3 THE PROPONENT AND KEY STAKEHOLDERS ............................................................................................................... 12 2.4 PROJECT AREA DESCRIPTION.................................................................................................................................... 13 2.4.1 Catchment Area of the Dam ......................................................................................................................... 13 2.4.2 Dam Site and Buffer Areas ........................................................................................................................... 13 2.4.3 Service Areas ............................................................................................................................................... 13 2.4.3.1 Treatment Works – Kipkelion – Fort Ternan ................................................................................................ 13 2.4.3.2 Masaita Tank – Londiani –Kedowa–Chepseon ........................................................................................... 14 2.4.4 Downstream Kipchorian River ...................................................................................................................... 14 2.4.5 Water Transmission Way Leave .................................................................................................................. 14 2.4.6 Way Leave Crossings ................................................................................................................................... 15 2.5 ANALYSIS OF PROJECT ALTERNATIVES ....................................................................................................................... 15 2.5.1 Dam Site Selection Criteria .......................................................................................................................... 16 2.5.2 Transmission Pipeline Routes ...................................................................................................................... 17 2.5.3 No Project Alternative ................................................................................................................................... 17 2.5.4 Material and Technology .............................................................................................................................. 17 2.6 DESIGN CONCEPTS ................................................................................................................................................... 18 2.6.1 Basic Consideration ...................................................................................................................................... 18 2.6.2 Dam Components Specifications ................................................................................................................. 19 2.6.2.1 Dam Embankment ........................................................................................................................................ 19 2.6.2.2 Diversion Culverts ......................................................................................................................................... 20 2.6.2.3 Spillway ......................................................................................................................................................... 20 2.6.2.4 Intake Tower ................................................................................................................................................. 20 2.6.2.5 Hydropower Unit ........................................................................................................................................... 21 Environmental and Social Impact Assessment (ESIA) Study Report i Feasibility Study, Preliminary and Final Designs, Environmental and Social Impact Assessment and Preparation of Tender Documents for the Proposed Londiani Dam Water Project 2.6.3 Water Treatment Works ............................................................................................................................... 21 2.6.4 Transmission Pipeline .................................................................................................................................. 23 2.7 WATER USE OPTIONS ..............................................................................................................................................