The Bhumibol Dam was constructed across the Ping River at
Khao Kaew Sub-district, Sam Ngao District of Tak Province.
Constructed in 1958 and completed in 1964 with the dam height
of 154 m, crest length of 486 m and retention capacity of 13,462
million m3, the dam is the first and largest multipurpose concrete
arch dam in Thailand. It has provided great benefits to the country
including electrical generation, irrigation in collaboration with the
Sirikit Dam for the areas under the Greater Chao Phraya Project of
1,200,000 ha in the wet season and 480,000 ha in the dry season,
flood mitigation of the Central Plain, inland navigation as well as
prevention of sea water intrusion in the lower Chao Phraya and Tha Chin river basin.