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Tehri Dam

Tehri Dam
Tehri Dam
Tehri Dam
Coordinates30°22′40″N 78°28′″N 78°28′50″E
ImpoundsBhagirathi River
LocaleUttarakhand, India
TypeEmbankment, earth and rock-fill
Length575 m (1,886 ft)
Height260 m (850 ft)
Base width1,128 m (3,701 ft)
Crest width20 m (66 ft)
Type of spillwayGate controlled
Discharge capacity of spillway15,540 m3/s (549,000 cu ft/s)
Construction began1978
Opening date2006
Construction cost$1 Billion USD
Maintained byTehri Hydro Development Corporation
Power generation information
TurbinesVertical Francis turbines
Installed capacity2000 MW (With PS plant)

The Tehri Dam is a rock and earth-fill embankment dam on the Bhagirathi River near Tehriin Uttarakhand, India. It is the primary dam of theTehri Hydro Development Corporation Ltd. and the Tehri hydroelectric complex. Completed in 2006, the Tehri Dam withholds a reservoir of 2.6 billion cubic meters for irrigation, municipal water supply and the generation of 1,000 MW of hydroelectricity along with an additional 1,000 MW of pumped storage hydroelectricity.


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 off the study. Constructed began in 1978 after feasibility studies but was delayed because of financial, environmental and social impacts. In 1986, technical and financial assistance was provided by the USSR but this was interrupted years later with political instability. India was forced to take control of the project and at first it was placed under the direction of the Irrigation Department of Uttar Pradesh. However, in 1988, the Tehri Hydro Development Corporation was formed to manage the dam and 75% of the funding would be provide by the federal government, 25% by the state. Uttar Pradesh would finance the entire irrigation portion of the project. In 1990, the project was reconsidered and the design changed to its current multi-purpose, including a 2400 MW power production capacity. Construction on the Tehri Dam was complete in 2006 while the second part of the project, the Koteshwar Dam, remains ongoing.


The 1000 MW Tehri Dam is part of the Tehri Hydropower Complex which also includes the 400 MW Koteshwar Dam downstream and the 1000 MW Tehri Pumped Storage Hydroelectric Power Plant which is set for completion in 2013.[1] The Tehri dam along with the downstream Koteshwar Dam and the Tehri pumped storage hydroelectricity power plantwill afford a power generation capacity of 2400 MW, provision of irrigation to an area of 270,000 hectares, irrigation stabilization to an area of 600,000 hectares, and a supply of 270million gallons of drinking water per day to the industrialized areas of Delhi, Uttar Pradesh and Uttarakhand.

Tehri dam on the rivers Bhagirathi and Bhilangana, 2005
Tehri dam in November 2004

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