When one think of clean energy, environmentally-friendly, one among this is “hydro energy”. Dam construction is regarded as the development of water sources for utilization. Dam is the source of storing and discharging water. Among EGAT dams, the dam which is outstanding and beautiful not less than its benefits is “Rajjaprabha Dam” or formerly known as “Chiew Larn Dam”. The beautiful scenery and peaceful atmosphere of Rajjaprabha Dam and its reservoir attracts a large number of tourists to the dam. The beautiful scenery of reservoir has been nicknamed as “Guilin of Thailand”. It is the last large dam of EGAT.

Rajjaprabha Dam is under the Water Source Development Project in the South. It helps strengthen security to the power system and economic prosperity which is consistent with the meaning of the dam’s name Rajjaprabha-“Light of the Kingdom”.

The dam gives benefits to irrigation for cultivation and flood relief in the rainy season. The water storage can reduce the severity of large amounts of water, to dilute wastewater, to prevent the saltwater from intrusion at the mouth of the river. Moreover, the reservoir serves as the freshwater fishery and promoting tourism to earn more income for local villagers.

 Rajjaprabha Dam is under the project to celebrate the 5^th Cycle Birthday Anniversary of His Majesty King Bhumibol and the Ceremonial Rajamangala in 1987 which is a great honor for EGAT and the people of Surat Thani Province. The construction of the dam began on 9 February 1982 and was completed in September 1987. His Majesty King Bhumibol, accompanied by Her Royal Highness Princess Maha Chakri Sirindhorn, performed the inauguration of the dam and power plant on 30 September 1987. At present, the power plant has contractual generating capacity of 240 MW.