Awash River, located in eastern Ethiopia, rises on a steep northern escarpment of the Eastern (Great) Rift Valley. It is fed by number of tributaries including Lakes Shala, Abiyata, Langano, and Ziway. The Dams (notably the Koka Dam, 1960) supply hydroelectric power. Herds of antelope and gazelle live in the Awash National Park. The river ends in a chain of salt lakes in the Denakil Plain, after a north-easterly course of about 750 miles (ca. 1,207 km).