Bhumibol dam, originally known as Yanhee, is located at Khao Kaeo in Sam Ngao district, Tak province.
concrete arch gravity
The hydroelectric plant situated at the dam base presently has a total installed capacity of 743.8 MW from its seven conventional hydropower generating units (Units 1 – 6 of 76.3 MW each and Unit 7 of 115 MW) and one reversible pump turbine unit. Bhumibol Unit 8 has double-fold functions, serving as a water pump during the off-peak hours to recapture water from the lower reservoir and pump it back up to the upper reservoir; and also operating as a generator to produce electricity during peak periods.
Units 1-2: 1964
Units 3-6: 1967, 1967, 1968 and 1969
Unit 7: 1982
Unit 8: 1996
Date of Inauguration: May 17, 1964