Koteshwar Dam

Koteshwar Dam
Koteshwar Dam is located in Uttarakhand
Koteshwar Dam
Location of Koteshwar Dam in Uttarakhand
CountryIndia
LocationNew Tehri
Coordinates30°15′37″N 78°29′53″E / 30.26028°N 78.49806°E / 30.26028; 78.49806
Opening date2011
Owner(s)Tehri Hydro Development Corporation
Dam and spillways
Type of damGravity
Height97.5 m (320 ft)
Length300 m (984 ft)
Elevation at crest618.5 m (2,029 ft)
Dam volume560,000 m3 (732,452 cu yd)
Spillway typeService, 4 x radial gate controlled
Spillway capacity13,240 m3/s (467,566 cu ft/s)
Reservoir
Total capacity88,900,000 m3 (72,072 acre⋅ft)
Active capacity35,000,000 m3 (28,375 acre⋅ft)
Catchment area7,691 km2 (2,970 sq mi)
Surface area29 km2 (11 sq mi)[1]
Normal elevation612.5 m (2,010 ft) (full)
Power Station
Commission date2011-2012
Hydraulic head75 m (246 ft) (max)
Turbines4 x 100 MW Francis-type[2]
Installed capacity400 MW

The Koteshwar Dam is a gravity dam on the Bhagirathi River, located 22 km (14 mi) downstream of the Tehri Dam in Tehri District, Uttarakhand, India. The dam is part of the Tehri Hydropower Complex and serves to regulate the Tehri Dam's tailrace for irrigation and create the lower reservoir of the Tehri Pumped Storage Power Station. In addition, the dam has a 400 MW (4x100 MW) run-of-the-river power station.[3] The project was approved in 2000 and its first generator was commissioned on 27 March 2011 and the second on 30 March 2011. The construction site had been inundated in September 2010 by floods. The diversion tunnel was later blocked heaving/collapse of the hill in December 2010. The spillway was commissioned in Jan, 2011.[4] The last two generators were made operational in March 2012.[5]

Design

The dam is 97.5 m (320 ft) tall and 300 m (984 ft) long. It has a structural volume of 560,000 m3 (732,452 cu yd) and its crest lies at an elevation of 618.5 m (2,029 ft) above sea level. The dam's spillway consists of four 18 m (59 ft) wide and 16 m (52 ft) tall radial gates. When the reservoir is at flood level, the spillway has a discharge capacity of 13,240 m3/s (467,566 cu ft/s). Receiving water from Tehri Dam and collecting it from an overall 7,691 km2 (2,970 sq mi) catchment area, the dam creates a reservoir with a 88,900,000 m3 (72,072 acre⋅ft) capacity, of which 35,000,000 m3 (28,375 acre⋅ft) is active (or "useful"). The reservoir's surface area is 29 km2 (11 sq mi) and at full pool, it lies at an elevation of 612.5 m (2,010 ft). The dam's power station is a run-of-the-river type and uses the active storage in the reservoir which can draw the lake down 30 m (98 ft) from full pool. The power house is located on the right bank of the river below the dam and contains 4 x 100 MW Francis turbine-generators. The height of the dam allows for a maximum 75 m (246 ft) of hydraulic head.[1][2]

See also

References

  1. ^ a b "India: National Register of Large Dams 2009" (PDF). Central Water Commission. Archived from the original (PDF) on 21 July 2011. Retrieved 14 August 2011.
  2. ^ a b "Features". Tehri Hydro Development Corporation. Retrieved 14 August 2011.
  3. ^ "Koteshwar Hydro Power Project". Tehri Hydro Development Corporation. Archived from the original on 29 November 2011. Retrieved 14 August 2011.
  4. ^ "Koteshwar project was commissioned within six months of the crisis". Projects Info. 18 April 2011. Retrieved 14 August 2011.
  5. ^ "Projects:Current Status". Tehri Hydro Development Corporation. Archived from the original on 6 October 2015. Retrieved 14 August 2011.

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