Karun-4 Dam
| Karun-4 Dam | |
|---|---|
The dam under construction
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 Location of Karun-4 Dam in Iran
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| Location |
Chahārmahāl-o-Bakhtiyārī Iran |
| Coordinates | 31°35′58″N 50°28′20″E / 31.59944°N 50.47222°ECoordinates: 31°35′58″N 50°28′20″E / 31.59944°N 50.47222°E |
| Construction began | 1997 |
| Opening date | 2010 |
| Construction cost | 1.2 billion dollars |
| Operator(s) | IWPRDC |
| Dam and spillways | |
| Impounds | Karun River |
| Height | 230 m (750 ft) |
| Length | 440 m (1,440 ft) |
| Spillway capacity | 6,150 m3/s (217,000 cu ft/s) |
| Reservoir | |
| Creates | Reservoir |
| Total capacity | 2,190,000,000 m3 (1,780,000 acre·ft) |
| Catchment area | 12,813.4 km2 (4,947 sq mi) |
| Surface area | 29 km2 (11 sq mi) |
| Power station | |
| Commission date | 2010-2011 |
| Turbines | 4 x 255 MW Francis-type |
| Installed capacity | 1,020 MW |
The Karun-4 Dam is an arch dam on the Karun River located at 180 km southwest of Shahr-e-Kord in the province of Chaharmahal and Bakhtiari, Iran. The Karun has the highest discharge of all the Iranian rivers. Its construction is aimed at electric power supply of 2107 million kWh annually and controlling floods in the upper Karun.
The dam is a concrete double curvature arch-type and 230 metres (750 ft) high from the foundation. The arch dam design is an ideal one for a dam built in a narrow, rocky gorge to hold back water in a reservoir. The dam is curved. Because of the arch shape, the force of the backed up water presses downward against the dam and has the effect of strengthening the dam foundation. The dam withholds a reservoir with a surface area of 29 square kilometres (11 sq mi) and capacity of 2.19 cubic kilometres (1,780,000 acre·ft). The dam's first study was conducted in 1995 and river diversion began in 1997. Concrete pouring began in 2006 and the power plant began producing electricity in November 2010. On December 11, 2010, the second generator for the dam became operational and was connected to the grid. The dam will eventually have an installed capacity of 1,020 MW. The dam was inaugurated on 6 July 2011 by Iranian President Mahmood Ahmadinejad.
It was built to fulfill the followings:
The dam construction was costed 8600 billion Rials financed by public resources including national and local budget, domestic banks facilities, bonds, as well as foreign facilities (finance, loan, etc.).Initial estimate of annual income from the electricity production amounted to 1353 billion Rials (642 Rials per kilo watt hour).
1. Daelim (Korea) + Sato (Japan): Main Civil Works
2. Ilbau (Austria) + Forman (Iran): Preconstruction Works
3. Machine Sazi Arak (Iran): Hydraulic Steel Structures
4. Farab (Iran) + Harbin (China): Mechanical Equipment
5. Farab (Iran) + Elin (Austria): Electrical I&C and HVAC Equipment
6. IEO (Iran): GIS Switchgear
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