Warsak Hydro Electric Power Project is located on River Kabul at about 30 km from Peshawar in North-West Frontier Province of Pakistan. The project financed by Canadian Government was completed under COLOMBO PLAN in two phases. In general, the project consists of a mass concrete gravity dam with integral spillway, power tunnel, power station, a concrete lined 10 feet diameter irrigation tunnel on right bank and a 3 feet diameter steel pipe irrigation conduit on the left bank of the reservoir. The 250 ft. high and 460 ft. long dam with reservoir of 4 square miles had a live storage capacity of 25,300 acre-feet of water for irrigation of 119,000 acres of land and meeting power generation requirement. A spillway with nine gates is capable to discharge 540,000 cusecs of flood water.
The first phase including construction of Dam, Irrigation tunnel, civil works for Phase-II and installation of four units each of 40 MW capacity with 132 kv transmission system, was completed in 1960 at a total cost of Rs.394.98 million. Two additional generating units each of 41.48 MW capacity were added in 1980-81 at a cost of Rs.106.25 million as second phase of the project.
Warsak Dam has now completely silted up and practically there is no available storage. Power generation is being achieved according to water inflows in River Kabul like a "Run-of-the-River' project. Lean flow period at Warsak is observed from October to March during which capability reduces to about 100 MW (Peak).