O Chum 2 Hydropower Dam Panorama, Cambodia

O Chum 2 Hydropower Dam is located on O Chum River, in Banlung, Ratanakiri Province, Cambodia with an installed capacity 1 megawatt (1,300 hp), 51 gigawatt-hours (180 TJ) annually. Seasonal storage hydropower, head 32.6 metres (107 ft), height 10 metres (33 ft), length 3,107 metres (10,194 ft), active storage .1 million cubic metres (3.5×10^6 cu ft), catchment area 45 square kilometres (17 sq mi) However, in Ratanakiri, local people are apparently facing serious problem related to change of quality of water in the Se San river and it was reported that the quality of water has deteriorated greatly since 1996 (Fishery office & NTFP, 2000). Residents in Ratanakiri have a poor access to electricity. Only 3,529 households out of 27,396 total households in the province can access to electricity- a percentage access of 12.8%. Only residents in the 3 towns (Banlung, Lumphat, and Veun Sai) can have electricity. O Chum 2, commissioned in 1993, is a 1 MW mini-hydropower plant located in the north-east of Ratanakiri province. It is owned and operated by the Cambodian government and has an estimated annual generation output of between 2.2-2.5 GWh.

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