[1] The Lower Sesan 2 (LSS2) was first envisaged in a 1999 study funded by the Asian Development Bank, and in which it was deemed an unattractive investment due to its marginal financial viability and its large potential environmental impact.

[6] The project was built by the Hydro Power Lower Sesan 2 Co. Ltd., a joint company of the Royal Group of Cambodia and Hydrolancang International Energy.

Both upstream and downstream, the effects of the dam are expected to drastically reduce the fishery resources on which many thousands more villagers depend for food and income.

Both the Sesan and Srepok rivers originate in Vietnam's central highlands before flowing through Stung Treng and Ratanakiri (and Mondulkiri) provinces in northeast Cambodia, making hydropower development along these two Mekong tributaries an international and transboundary concern.

In total, at least 78,000 people living above the Sesan 2 dam site are expected to lose access to migratory fish[8] Download coordinates as: