Initial studies were carried out of the project by Tractionell Consultant, a Belgian Company, in 1970. The first phase studies were completed in 1972 by the same company.
In 1984 the Moshanir and Lahmayer International Joint venture, began phase II studies and preparation of tender documents which were completed in 1986.
Technical and economical provisional studies were started again in 1999 by the EDF Company and completed in 2000. Phase II design completion was carried out by Moshanir-EDF in 2002.
The project is located in the vicinity of Siah-Bisheh village in Mazandaran province 125 km to the north of Tehran and 10 km to the north of kandovan tunnel on Chalus river . The objectives of the project are generating 1000 MW of hydroelectric energy and creating balance in the national electricity network during peak and non-peak hours.


Project specifications Upper Dam Lower dam
Dam type Concrete faced rockfill dam (CFRD) CFRD
Height 85 m 104 m
Crest length 390 m 330 m
Crest width 15 m 15 m
Spillway capacity 170 m3/s 890 m3/s
Reservoir volume 3.5 million m3 3.6 million m3
Spillway type Free Ogee Free Ogee
Energy dissipation system Flip bucket Flip bucket with plunge pool

Water diversion system:
Two tunnels: Diameter of upper dam tunnel: 2.95 m. Diameter of lower dam tunnel: 4 m.

Water conveyance tunnel:
Tunnel diameter: 5.7 m
Tunnel length: 2 km
Water flow rate: 130 m3/s

Power plant specifications:
Power plant cavern: Length 130 m, Width 22 m, Height 42 m
Transformer cavern: Length 182 m, Width 13m, Height 22 m
Turbine type: Four 250-MW vertical Francis turbines

Reporter : mehdi akbarsefat

َApproved by : Story Id 28

Create date : 27 Apr 2008 14:13

Id : 3163

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