Environmental And Social Impact Assessment Report

“Darial Energy” LLCDariali Hydro Power Plant Construction and Operation ProjectEnvironmental and Social Impact Assessment ReportExecutorsScientific Research Firm “Gamma"President : V. Gvakharia“Stucky Caucasus“ LLCGeneral Director : B. Quigley2011SCIENTIFIC RESEARCH FIRM “GAMMA 17a. Guramishvili av, 0192, Tbilisi, Georgiatel: (995 32) 260 44 33 (995 32) 260 15 27 e-mail: gamma@gamma.ge

EIA-Dariali HPP2 / 205Table of Content1Introduction .71.11.22General Overview .7Basis and Goals of Environmental and Social Impact Assessment Report .7Legal-institutional framework.82.1Georgian legislation and institutional framework.82.1.1 State policy objectives .82.1.2 Regional and international cooperation .92.1.2.1Regional cooperation .92.1.2.2International agreements.102.1.3 Institutional Framework for Environmental Protection .102.1.4 Environmental Legislation .112.1.4.1Overview of the key environmental legislation acts.132.1.4.2Environmental Standards .182.1.5 Environmental Impact Assessment Process in Georgia .202.2Environmental and Social Standards of International Financial Institutions .212.2.1 Lender Policies and Standards .222.2.1.1EBRD Environmental and Social Policy, 2008 .222.2.1.2International Financial Corporation Guidelines and Standards .303Analysis of alternatives for the planned activities .303.1No Action Alternative .303.2A Seasonal Regulation HPP Construction Alternative .313.3A Riverbed Type HPP Construction Alternative .343.4Diversion type HPP construction alternatives .343.4.1 Two-stage run-of-the-river HPPs construction alternative .343.4.2 One-Stage Diversion HPP Construction Alternative .363.4.2.1Alternatives for Headworks .383.4.2.2Diversion System alternatives .403.4.2.3Penstock Alternatives .443.4.2.4Alternatives for Power Unit .453.5Comparison of Alternatives .463.6Conclusion.494HPP Construction and Operation Project Description.494.1General Review of the Project.494.2HPP Structure Description .544.2.1 Water Intake .544.2.1.1Dam .544.2.1.2Settling Basin.554.2.1.3Fishway.564.2.2 Diversion System .564.2.2.1Diversion Pipeline.564.2.2.2Diversion Tunnel .574.2.3 Power Unit Facility .584.2.3.1Surge Shaft.604.2.3.2Power House .604.2.3.3Tailrace Tunnel and Channel .604.2.3.4Cable Duct and Service Tunnel .604.2.3.5Open Substation .614.3Description of Construction Works .614.3.1 Construction camp and Construction sites.614.3.1.1Construction camp.61SCIENTIFIC RESEARCH FIRM “GAMMA

EIA-Dariali HPP3 / 2054.3.1.2Construction Sites .624.3.1.3Power Supply .624.3.2 HPP Construction Works.624.3.2.1General Provisions .624.3.2.2Headwork .634.3.2.3Diversion Pipeline.634.3.2.4Diversion Tunnel .644.3.2.5Surge Shaft and Power House .644.3.3 Machinery Requirements for Construction Operations .644.3.4 Water Supply and Sanitation .654.3.4.1Water Supply .654.3.4.1.1 Drinking and Domestic Water Supply.654.3.4.1.2 Technical water supply.664.3.4.2Household-fecal and industrial wastewater .664.3.4.2.1 Household-fecal wastewater .664.3.4.2.2 Industrial wastewater .674.3.4.3Wastewater treatment .675Baseline environmental condition of design work area .695.1Overview .695.2Socio-economic environment.715.2.1 Demographic condition.715.2.2 National and ethnic composition .725.2.3 Employment.725.2.4 Economy .735.2.4.1Industry .735.2.4.2Power resource.745.2.4.3Agriculture .745.2.4.4Technical infrastructure .755.2.5 Education .755.2.6 Tourism Potential .765.2.7 Cultural and Historical Resources.775.2.8 Drinking Water Supply .795.3Physical- geographical environment .795.3.1 Climate and meteorological conditions .795.3.1.1Temperature .795.3.1.2Volumes of precipitations.815.3.1.3Air humidity.825.3.1.4Wind data .825.3.2 Geological Conditions .835.3.2.1Geomorphology .835.3.2.2Stratigraphy and Lithological Composition.845.3.2.3Tectonics and Structural Geology .855.3.2.4Fractures (disjunctive dislocations) .865.3.2.5Dangerous Geological Processes.865.3.2.6Seismic Conditions.875.3.2.7Hydrogeology .875.3.2.8Soil Cover .885.3.2.9Detailed Engineering- Geological Survey.885.3.2.9.1 Geotechnical survey of the headworks and settling basin.885.3.2.9.2 Diversion Pipeline .895.3.2.9.3 Diversion Tunnel .905.3.2.9.4 Surge Shaft.915.3.2.9.5 Penstock .91SCIENTIFIC RESEARCH FIRM “GAMMA

EIA-Dariali HPP4 / 2055.3.2.9.6 Powerhouse Location Area.915.3.2.9.7 Geological and geotechnical examinations that are required to be carried out at the finaldesign stage.925.3.3 Hydrology .935.3.3.1Hydrological description of Tergi River .945.3.3.1.1 Tergi River average annual flows.945.3.3.1.2 Tergi River maximal flows .965.3.3.1.3 Tergi River maximal flows .985.3.3.1.4 Tergi River solid flow .995.3.4 Main landscapes .1005.3.5 Biological environment .1015.3.5.1Flora.1015.3.5.2Fauna .1045.3.5.2.1 Animals, typical for the upstream parts of Tergi River basin .1045.3.5.2.2 Ichthyofauna of the upstream part of the Tergi River .1065.3.5.3Protected Areas .1076Environmental and Social Impact Assessment .1097Environmental and Social Impact Assessment .1137.1General Principals of ESIA Methodology .1137.1.1 Impact Receptors and their Sensitivity.1147.1.2 Impact Characterization .1147.2Impact on Atmospheric Air Quality .1157.2.1 Impact Assessment Methodology .1157.2.2 Impact Description .1157.2.2.1Construction Phase .1157.2.2.2Operation Phase .1157.2.2.3Decommission Phase .1157.2.3 Impact Assessment.1167.2.3.1Sensitive Receptors .1167.2.3.2Operation Phase .

Environmental and Social Impact Assessment Report Executors Scientific Research Firm “Gamma" President : V. Gvakharia “Stucky Caucasus“ LLC General Director : B. Quigley 2011 SCIENTIFIC RESEARCH FIRM “GAMMA 17a. Guramishvili av, 0192, Tbilisi, Georgia tel: (995 32) 260 44 33 (995 32) 260 15 27 e-mail: gamma@gamma.ge