Lake Ouachita (Pronounced WAH-shi-tah) is a reservoir created by the damming of the Ouachita River by Blakely Mountain Dam (34°34′21″N 93°11′39″W / 34.57250°N 93.19417°W). Blakely Mountain Dam was built by the United States Army Corps of Engineers from 1948 to 1953 for hydroelectric power, recreation, water supply and wildlife conservation. The dam is 231 feet (70 m) tall, 1,100 feet (340 m) long at the crest, and is capable of 75 megawatts.