Hua Na Dam

Hua Na Dam (เขื่อนหัวนา,, ), in Kanthararom District, Sisaket Province, is the biggest dam in the Khong-Chi-Mun project in Thailand. It is close to the Rasi Salai Dam, which has been inoperable for over 10 years because of extreme salinity. Hua Na sits atop the same salt dome as Rasi Salai and may face the same fate if the gates are ever closed. Its height is 17 m, while its length is 207 m. It has 14 gates and a catchment area of 115000000 m3. The reservoir stretches for 90 km, while its surface area is unknown. The reservoir has a manageable storage capacity of 64.98 million cubic metres.

It exceeded its budget of 1.5 billion baht, costing 2.5 billion.

Opponents note that no Environmental Impact Assessment (EIA) was completed before construction, leaving concerns about flooding and salinity unresolved. Clay resources, which provide a primary occupation for many villagers, would be endangered if the dam gates were closed.