| Ichari Dam | |
|---|---|
 Ichari Dam on Tons river | |
  Location of Ichari Dam in Uttarakhand | |
| Country | India |
| Location | Dakpathar |
| Coordinates | 30°36′49″N77°47′28″E / 30.61361°N 77.79111°E /30.61361; 77.79111 |
| Status | Operational |
| Opening date | 1972 |
| Owner(s) | Uttarakhand Jal Vidyut Nigam Ltd (UJVN) |
| Dam and spillways | |
| Type of dam | Gravity |
| Impounds | Tons River |
| Height | 59 m (194 ft)[1] |
| Length | 155 m (509 ft) |
| Dam volume | 181,000 m3 (236,739 cu yd) |
| Spillway capacity | 13,500 m3/s (476,748 cu ft/s) |
| Reservoir | |
| Creates | Ichari Reservoir |
| Total capacity | 8,930,000 m3 (7,240 acre⋅ft) |
| Active capacity | 5,110,000 m3 (4,143 acre⋅ft) |
| Surface area | 8 km2 (3 sq mi) |
| Power Station | |
| Commission date | Chibro: 1975 Khodri: 1984 |
| Type | Run-of-the-river |
| Hydraulic head | Chibro: 110 m (361 ft) Khodri: 57.9 m (190 ft) |
| Turbines | Chibro: 4 x 60 MWFrancis-type Khodri: 4 x 30 MWFrancis-type |
| Installed capacity | Chibro: 240 MW Khodri: 120 MW |
TheIchari Dam is a concretegravity dam on theTons River 13 km (8 mi) north ofDakpathar inUttarakhand,India. The primary purpose of the dam ishydroelectric power production and it is arun-of-the-river-type. It was completed in 1972. The dam diverts water to theChibro Power Station (240 MW) which is then returned to the Tons River before being fed to theKhodri Power Station (120 MW).
The dam is a 59 m (194 ft) tall and 155 m (509 ft) long concrete gravity type with a structural volume of 181,000 m3 (236,739 cu yd). The dam'sspillway is located across its crest and is controlled by seven floodgates. It has a maximum discharge capacity of 13,500 m3/s (476,748 cu ft/s). The dam'sreservoir has a 8,930,000 m3 (7,240 acre⋅ft) capacity, of which 5,110,000 m3 (4,143 acre⋅ft) is active (or "useful") capacity. The surface area of the reservoir is 8 km2 (3 sq mi).[2]
Adjacent to the dam and on its left bank, water is diverted into a 6.2 km (4 mi) head-race tunnel which leads south to theunderground power station at30°33′23″N77°47′53″E / 30.55639°N 77.79806°E /30.55639; 77.79806 (Chibro Power Plant). There, the water powers four 60 MWFrancis turbine-generators. The designhydraulic head of the station is 110 m (361 ft) and its design discharge is 200 m3/s (7,063 cu ft/s). The plant was commissioned in 1975 and was the first power plant built underground in Northern India.[3]Made by
Water discharged from the Chibro Power Plant is returned into the Tons River just 100 m (328 ft) upstream of the intake for the Khodri Power Station. Water enters the intake and then travels south down a 7.5 km (5 mi) head-race tunnel which leads to the power station on theYamuna River at30°30′30″N77°47′59″E / 30.50833°N 77.79972°E /30.50833; 77.79972 (Khodri Power Plant). There, the water powers four 30 MW Francis turbine-generators before being discharged into a tail-race channel behind theDakpathar Barrage. The design hydraulic head of the station is 57.9 m (190 ft) and its design discharge is 200 m3/s (7,063 cu ft/s). The plant was commissioned in January 1984.[4]
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