At Tarbela in Haripur this project is situated on the narrow spot in the Indus River Valley. District Swabi starts from the point of this dam’s location. Close to the left bank and around the large island this river formerly splits. The main wall of the dam stretches 2.743 meters to river right from island and is made of earth and rock fill, and it is 486 feet high. The river is extended from the island to river left by a pair of concrete auxiliary dams. On the auxiliary dams, spillways that consist of two parts as well are located. 18,406 cubic meters per second is the discharge capacity of the main spillway and 24,070 cubic meters per second is the discharge capacity of the auxiliary spillway. A group of four tunnels called outlook workers at right river, have been cut through the valley wall to flow control and hydropower generation.