Nam Un Dam

Nam Un Dam is an earthfill dam and reservoir in Nikhom Nam Un District, Sakon Nakhon Province, northeastern Thailand. Built on the Nam Un River, a tributary of the Songkhram River, it was constructed between 1965 and 1974. The dam is 29.5 meters high and 1,720 meters long, impounding a reservoir with a capacity of about 520 million cubic meters for irrigation, flood control and fisheries, and is a local sightseeing and recreation area.

Visitors can expect a long earthen embankment with a paved crest road, wide reservoir views and lakeside scenery. The area includes viewpoints over the water, fishing boats on the reservoir, open grassy banks used for picnics, and access roads around the reservoir. The setting is rural and open, with agricultural land and low hills surrounding the water. Facilities are basic and the site is primarily for sightseeing, photography and leisure by the water.

Constructed between 1965 and 1974 by the Royal Irrigation Department as part of the Nam Un Development Project. The earthfill dam was built to store water from the Nam Un River for irrigation of agricultural land, flood mitigation in the Songkhram River basin, and to support inland fisheries and water supply in northeastern Thailand.

The reservoir plays an important role in local agriculture and livelihoods, supporting rice cultivation and freshwater fisheries for communities in Nikhom Nam Un and surrounding districts. It is a well-known local recreation area for residents of Sakon Nakhon Province.