Köprü Dam and HEPP
Project’s Overview
The project included building a roller-compacted-concrete (RCC) gravity dam with an integrated ungated spillway which has a water release capacity of 4,500 m3/s. The dam is 109 meters high from the foundation and has a crest length of 415 meters. The crushed rock aggregate generated from an onsite stone quarry amounted to nearly 1,000,000 m3 to build the RCC dam.
The river diversion work includes a 600-meter-long tunnel with an excavation diameter of 10.5 meters. It is concrete lined to an internal diameter of 9.5 meters. In addition, the upstream and downstream rock-fill cofferdams with an RCC volume of 55,000 m3 were built to divert the stream flow through the diversion tunnel during the dam construction.
An open-air powerhouse is located on the right bank of the river. The plant houses two generating units with vertical shaft Francis turbines, coupled with synchronous generators, each having a capacity of 72.5 MW, and with an operating maximum head of 90 meters. The total installed power is 145 MW.
The main dam was completed 9 months before the date set by the contract. The project started in 2009 and was completed in 2014. The site was fully commissioned in 2015. It is owned and operated by Enerjisa Company.