The dam kaeng SUA away from the confluence of the Yom river is long, flows from the province to the north, Ngao district about 6.7 kilometers. Away from Mueang Phrae 50 kilometers, catchment area, 3583 square kilometers, average runoff 933 million cubic meters per year. River irrigation area with larger area, 200000 Rai downstream also relies on rainwater. The dam is a rockfill dam concrete wide 10 meters high from the belly River 69 meters long ridge the dam 540 meters.367.228 rai.