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Location of Tehri Dam|
Country|India|
Location|Uttarakhand[->0]|
Coordinates|30°22′40″N 78°28′50″ECoordinates[->1]: 30°22′40″N 78°28′50″E|
Status|Operational|
Construction began|1978|
Opening date|2006|
Construction cost|US$1 billion|
Owner(s)|Tehri Hydro Development Corporation|
Dam and spillways|
Type of dam[->2]|Embankment[->3], earth and rock-fill|
Height|260.5 m (855 ft)|
Length|575 m (1,886 ft)|
Crest width|20 m (66 ft)|
Base width|1,128 m (3,701 ft)|
Impounds|Bhagirathi River[->4]|
Type of spillway|Gate controlled|
Spillway capacity|15,540 m3/s (549,000 cu ft/s)|
Reservoir|
Capacity|2.6 km3 (2,100,000 acre·ft[->5])|
Surface area|52 km2 (20 sq mi)|
Power station|
Commission date|2006|
Turbines|Vertical Francis turbines[->6]|
Installed capacity|1,000 MW|
Maximum capacity|2,400 MW|
As of 20 February 2011|
The Tehri Dam is the highest dam in India, 2nd highest in Asia and 8th highest in world. It is a multi-purpose rock and earth-fill embankment dam[->7] on the Bhagirathi River[->8] near Tehri[->9] in Uttarakhand[->10], India[->11]. It is the primary dam of the THDC India Ltd. and the Tehri hydroelectric[->12] complex. Phase 1 was completed in 2006, the Tehri Dam withholds a reservoir for irrigation[->13], municipal water supply[->14] and the generation of 1,000 MW of hydroelectricity. The dam's 1,000 MW pumped-storage[->15] scheme is currently under construction.[1]
Contents[hide] · 1 History · 2 Technical description · 3 Environmental issues · 3.1 Scheduling and Generation Despatch· 4 References · 5 External links|
History
A preliminary investigation for the Tehri Dam Project was completed in 1961 and its design was completed in 1972 with a 600 MW capacity power plant based on the study. Construction began in 1978 after feasibility studies but was delayed due to financial, environmental and social impacts. In 1986, technical and financial assistance was provided by the USSR[->16] but this was interrupted years