Pasak dam lakes located at Ban Nong Bua district settlement. Lopburi The dam is the longest in the country.The river is the 13th largest in the country's 25 river basins. The basin area of about 14,520 square kilometers . The long, narrow basin. Watersheds in Loei The river has a length of 513 kilometers through the province of Phetchabun, Lop Buri, Saraburi, and meets the Chao Phraya River in Ayutthaya. A runoff is about 2400 million cubic meters per year.
King His Majesty the King on February 19 2532 for a feasibility study of the project Irrigation dam catchment river. Urgently to solve the water shortage. To benefit farmland and alleviate flooding problems recurring in the watershed forest. A sequel to Bangkok. And by metropolitan area This summer brings a rat almost all year
on 3 May 2537 the project spent five years between the 2537-2542 and the King. This dam was gracious King said. "Pasak dam lakes" which means "river dams that store water efficiently," Pasak dam lakes. Began to store water for the first time on 15 June 2541, which King Maha Chakri Sirindhorn's. Siam Royal mulatto Has graciously presided over the ceremony. Pasak Jolasid The dam is a clay core length of approximately 4,860 meters catchment highest level +43.00 meters above sea level. 960 million cubic meters of water retention.And a third of the building drain.
- Building an overflow drain Drain up to 3900 cubic meters per second
- a building sewer water into the river. Drain up to 80 cubic meters per second
- a building sewer emergency. Drain up to 65 seconds per cubic meter to Pasak dam lakes.