The 93 m high and 2720 m long Klong Tha Dan Dam, most now call it the Khun Dan Prakan Chon Dam, designed for irrigation on the Nakon Nayok River, is the largest Roller-Compacted Concrete (RCC) dam in the world by volume of concrete used, at 5 million cubic metres. It has a spillway with discharge capacity of 1,600 m3/sec.
Tractebel Engineering has been in charge of preliminary design and drafting of tender documents and works supervision for the construction of the dam