Gansu Heihe Hydropower Development Project
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Environmental Assessment Report Summary Environmental Impact Assessment Project Number: 39652 April 2006 People’s Republic of China: Gansu Heihe Hydropower Development Project Prepared by the Government of Gansu Province for the Asian Development Bank (ADB). The summary environmental impact assessment 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. CURRENCY EQUIVALENTS (as of 28 February 2006) Currency Unit – yuan (CNY) CNY1.00 = $0.124 $1.00 = CNY8.083 ABBREVIATIONS ADB – Asian Development Bank EIA – environmental impact assessment EMP – environmental management plan EMU – environment management unit EPB – environmental protection bureau GEPRI – Gansu Environmental Protection Research Institute GFB – Gansu Financial Bureau HHC – Heihe Hydropower Company HPP – hydropower plant PPTA – project preparatory technical assistance PRC – People’s Republic of China QNNR – Qilianshan National Natural Reserve SEIA – summary environmental impact assessment ZEMS – Zhangye Environmental Monitoring Station WEIGHTS AND MEASURES C – celsius ha – hectare kg – kilogram km – kilometer kV – kilovolt kWh – kilowatt-hour m – meter m3 – cubic meter m3/s – cubic meter per second mm – millimeter MW – megawatt S – second t – ton NOTE In this report, "$" refers to US dollars. CONTENTS Page MAPS I. INTRODUCTION 1 II. DESCRIPTION OF THE PROJECT 1 III. DESCRIPTION OF THE ENVIRONMENT 2 A. Physical Environment 2 B. Biological Environment 6 C. Sociocultural Environment 9 IV. ALTERNATIVES 10 V. ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES 11 A. Soil 11 B. Water 11 C. Air Quality 12 D. Noise 12 E. Solid Waste 12 F. Flora and Fauna 13 G. Access Roads and Transmission Lines 14 H. Sociocultural Environment 14 I. Induced Impacts 15 J. Cumulative Impacts 15 VI. ECONOMIC ASSESSMENT 17 A. Environmental Costs 17 B. Environmental Benefits 17 VII. ENVIRONMENTAL MANAGEMENT AND ENVIRONMENTAL MONITORING PLAN 18 VIII. PUBLIC CONSULTATION AND INFORMATION DISCLOSURE 19 A. Stakeholder Consultation before the Environmental Impact Assessment 19 B. Stakeholder Consultation after the Environmental Impact Assessment 21 IX. CONCLUSION 22 APPENDIX Summary Environmental Management Plan 23 96 o 00'E 106 o 00'E MONGOLIA GANSU HEIHE HYDROPOWER X I N J I A N G U Y G U R DEVELOPMENT PROJECT A U TO N O M O U S R E G I O N IN THE PEOPLE'S REPUBLIC OF CHINA I N N E R M O N G O L I A N o o 40 00'N Jinta 40 00'N Dunhuang Jiayuguan 0 50 100 150 200 Jiuquan Yumen Gaotai Kilometers Linze Zhangye . R e Minqin ih e H Jinchang Minle Wuwei ERLONGSHAN HYDROPOWER PROJECT Gulang N I N G X I A Jingtai Huan Xian Tianzhu Zangzu Zizhixian Baiyin Jingyuan Xifeng Q I N G H A I LANZHOU Pingliang Provincial Capital Dingxi City/Town Linxia National Road Other Road Zhang Xian S H A A N X I Railway Linlan Tianshui River Provincial Boundary Cheng Xian o 34 o 00'N International Boundary 34 00'N Boundaries are not necessarily authoritative. Wudu 0 6 M - 0 S I C H U A N 7 0 a 3 p a H o o 96 00'E 106 00'E 1 R o 98 00'E 102 o 00'E Jiayuguan Jiuquan I N N E R M O N G O L I A N Gaotai Jingtieshan 0 10 20 40 60 Linze Kilometers o o 39 00'N 39 00'N Zhangye . Sunan Yugurzu R he Zizhixian ei H Bajiaowan Shandan Huazhai ERLONGSHAN Anyang Minqin Jinchang HYDROPOWER Sidalong PROJECT Mati Minle Yongchang GANSU HEIHE HYDROPOWER Xincheng DEVELOPMENT PROJECT Wuwei IN THE PEOPLE'S REPUBLIC OF CHINA Q I N G H A I Huangcheng o Core Zone o 37 30'N Gulang 37 30'N Experimental Zone City/Prefecture Government Tianzhu Zangzu County Seat Zizhixian National Road Other Road Railway River Buffer Zone County Boundary Prefecture Boundary Provincial Boundary 0 3 Boundaries are not necessarily authoritative. M - 0 7 a 0 3 p b H o o 98 00'E 102 00'E 2 R GANSU HEIHE HYDROPOWER DEVELOPMENT PROJECT Distribution of Construction Sites of Erlongshan Hydropower Project IN THE PEOPLE'S REPUBLIC OF CHINA Proposed Hydropower Project Future Hydropower Project r ive Operational Hydropower Project R ihe Under Construction Hydropower Project He Village Road Longshou No. 1 Hydropower Project Tunnel River/Creek Longshou No. 2 Hydropower Project Xiaogushan Hydropower Plant Bajiaowan Village Xiaogushan Dam Louzhuangzi Village Dagushan Hydropower Plant ully G Dagushan Dam ou X g i an l g i ng Erlongshan Hydropower Plant u ha s C h No. 1 Waste Rock Site u i C Duantougou Borrow Pit r k e ree e g C k don No. 2 Waste Rock Site lao H He eih Liushuyuan Borrow Pit e R iv Erlongshan Dyke Head Facilities er hou Ck. Sandaowan Hydropower Plant Huama Sandaowan Hydropower Dam ek re C ng Jiadaogou Hydropower Project lo da Si Huangzangsi N Hydropower Project 0 0 6 M 3 - - 0 0 7 7 Note: Not to scale a 0 0 3 p 3 c c H H 3 R R I. INTRODUCTION 1. This summary environmental impact assessment (SEIA) summarizes the assessment of environmental issues relating to the Erlongshan Hydropower Project (Project), located on Heihe River in Gansu Province in the People’s Republic of China (PRC). The SEIA was prepared in accordance with the Environmental Assessment Guidelines (2003) and Environment Policy (2002) of the Asian Development Bank (ADB). The Project is classified as category A in accordance with ADB environmental classification criteria. The total cost of the Project is $44 million. ADB is considering providing financing of $22 million; the PRC Government $22 million. The Project is anticipated to take 3 years to complete. 2. The SEIA is based on the Environmental Impact Assessment (EIA) Report, October 2004 for the Project, which was prepared by the Gansu Provincial Environment Protection Research Institute in parallel with the feasibility study conducted by the Gansu Water Conservancy and Hydropower Survey Design Institute. The SEIA is also based on the Gansu Middle Sized Hydropower Development Planning Report, 1991, prepared by the former Northwest Hydropower Design Institute, and the Heihe River (Huangzangsi to Dagushan) Cascade Development Report, 2004 prepared by the Gansu Water Conservancy and Hydropower Survey Design Institute. In October 2004, the Gansu Provincial Environment Protection Bureau (EPB) reviewed and approved the EIA. The Zhangye Erlongshan Water and Soil Conservation Report, 2004, was prepared by the Gansu Water and Soil Control Station and approved by the Gansu Water Conservation Bureau in November 2004. As the total installed capacity of the Project is less than 100 megawatts (MW), provincial approval of the EIA report is sufficient. State Environmental Protection Administration approval is not required for the Project. 3. The Project is located in Zhangye City, Gansu Province, PRC, which has a relatively high poverty rate of 29.3%. For several years, Zhangye has experienced electricity shortages due to low installed generation capacity and high transmission losses resulting in unreliable and low quality service (low end voltage electricity). The frequent interruptions of electricity supply have been a major factor inhibiting the city’s economic development. Given the projected demand growth, the power shortages are expected to become more acute. The Project is seen by the local and provincial governments as vital to accelerate Zhangye’s economic development. The area is relatively rich in hydropower resources. ADB has previously supported development of the regional hydropower capacity in Zhangye through the Gansu Clean Energy Development Project (Loan 2032) in 2003 which included construction of a 98 MW hydropower plant (HPP) on Heihe River at Xiaogushan, approximately 27 kilometers (km) downstream from the Erlongshan HPP Project site. II. DESCRIPTION OF THE PROJECT 4. The proposed Erlongshan Hydropower Project consists of a 50.5 MW run-of-the-river hydropower facility (2x20 MW and 1x10.5 MW units). The Project is located within Sunan County in Zhangye City. The project location is presented in map 1 and map 2. The Project will provide base-load electric power generation with annual electricity generation of 174 million kilowatt-hours (kWh). No dam construction or impounded water reservoirs are associated with the Project. The Project will redivert the discharge from the Sandaowan HPP directly to the Erlongshan intake structure. The Project will occupy 24.86 hectares (ha) of land, including 9.13 ha of permanently occupied land and 15.73 ha of temporarily occupied land. The Project will reduce water flow from a 10.3 km stretch of Heihe River. The Project will include construction of the following: 2 (i) a 110 kilovolt (kV) substation, (ii) a 4.7 km water intake tunnel (6-meter [m] diameter) with maximum flow capacity of 98 cubic meters/second (m3/s), (iii) temporary workers’ accommodation, (iv) permanent office and residential building, (v) two waste rock areas, (vi) two borrow pits, (vii) water intake structure, (viii) open water intake canal (217 m), (ix) water discharge canal (70 m), (x) front pool (10–22 m wide and 45 m long), (xi) pressure regulation shaft (15 m in diameter), and (xii) pressured water channel (303 m). 5. Additionally, the Project will use 38.6 km of 110 kV transmission line commencing at the Erlongshan HPP and terminating at Dayimalong Substation (330 kV), and 31 km of a single dead-end access road. The transmission line and the access road are joint-use facilities for the existing and proposed Heihe River HPPs and have already been constructed. 6. The Gansu Water Conservancy and Hydropower Survey Design Institute prepared the Heihe River (Huangzangsi to Dagushan) Cascade Development Report, 2004 to manage hydropower development in the Heihe River basin.