Environmental Impact Assessment for Mamaya I Hydropower Station on Beipan River Receives Approval

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Researched by Industrial Info Resources China (Beijing, China)--The environmental impact assessment for Guizhou Beipanjiang Power Company Limited's (Guiyang, Guizhou) Mamaya I Hydropower Station, which will be on the mainstream of Beipan River, recently received approval from the Ministry of Environmental Protection (MEP).

The Mamaya I Hydropower Power Station is the second scheme in the cascade development of the river section that is downstream from Maokou, on the mainstream of the Beipanjiang River. The dam site is in the Jiansha Gorge, at the boundary between Jianshan Village in Guanling County and Bulang Village in Xingren County, in the Guizhou province. The site has an annual average flow of 309 cubic meters per second. The main purpose of the project is power generation, along with diversified benefits in navigation, downstream ecological protection, and sightseeing.

According to the approval, the project comprises a 109-meter-high rolling compact concrete (RCC) dam, with a reservoir capacity of 136.5 million cubic meters, under a normal pool level that is 585 meters above sea level; a spillway and power diversion system; navigation facilities (not to be built in the current stage, but with space reserved for future construction); and a powerhouse to be furnished with three 180-megawatt (MW) and one 18-MW base-flow, Francis type hydraulic turbine generators. The total installed capacity of the project will be 558 MW, and the total investment for the project will be about $624 millions, including $37 millions for environmental protection, accounting for 6.08% of the total.

HydroChina Guiyang Engineering Corporation (Guiyang, Guizhou) is responsible for the survey and engineering on the project. According to the schedule, the project is expected to achieve river diversion at the end of this year. Construction of the main works is expected to begin shortly after the river diversion. Upon completion, the project will be able to generate about 1.6 billion kilowatt-hours of clean electricity to the local grid.

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