Well-known as the country's longest earth dam with the crest length of
7,800 m and height of 33 m, the dam was constructed during 1963 - 1968
across the Lam Pao and Huai Yang rivers at the adjoining areas of
Sahatsakhan, Muang Kalasin and Yang Talat districts of Kalasin Province .
The impounded water of 1,430 million cubic meters together with the
distribution system completed in 1985 has enabled the irrigation of water
over the cultivated areas of 50,288 ha in the wet season and 32,000 ha in
the dry season as well as flood alleviation in the Lam Pao and Chi river basins.