Tha Thung Na Dam

Tha Thung Na dam was constructed across Kwai Yai River located at an area called Ban Tha Thung Na in Chong Sa Dao sub-district, Mueang district, Kanchanaburi province.

Dam Features



Crest Length
Crest width
Reservoir’s storage capacity
Maximum reservoir water level

Rockfill and concrete

gravity dam
30 meters
840 meters
8 meters
54.8 million cubic meters


+59.70 meters (MSL)

Power Plant
The powerhouse is a reinforced concrete building with 5 floors. The building is 20 meters wide, 50 meters long and 45.87 meters high. It houses two 19 MW alternating current generating units, totaling 38 MW of generating capacity. The power plant is connected with the national grid system via a 115 kV transmission line linking Srinagarind switchyard and Kanchanaburi substation.

Operation Year
Unit 1: December 1981
Unit 2: February 1982

Date of Inauguration