Studies of the Yasuj Chain Project began in 1989 by Jihad Ministry and cooperation of Chinese Research Institute (ECHIDI). In basic studies construction of a reservoir dam had been predicted which was cancelled due to complex geological situation and technical difficulties. In further studies several other options were studied and finally the option of nine chain power plants with the capacity of 20 MW was approved by the client.
Construction activities of six of these nine power plants which had economical priority began. Karick1 and Polkolu1 were completed and put into operation in 1994 and 2004. Construction activities of Karick2 and Karick3 were also finished in 2006. Two power plants of Polkolu2 and Kohkdan were also tested in June 2007 and put into operation.
Power plants of Yasuj Chain Project are as follows: