[Himachal GK] Nathpa Jhakri Dam

The Nathpa Jhakri Dam is a concrete gravity dam on the Satluj River in Himachal Pradesh, India. The primary purpose of the dam is hydroelectric power production and it supplies a 1,500 megawatts
(2,000,000 hp) underground power station with water. Before reaching the power station, water is diverted through a 27.4 km (17 mi) headrace tunnel. Construction on the project began in 1993 and it was complete in 2004. The last two of the 250 megawatts (340,000 hp) Francis turbine-generators went online in March 2004. It is owned by SJVN Ltd.


                                                       fig: Nathpa Jhakri Dam

Important Details:


Location
Himachal Pradesh
India
Coordinates
31°33′50″N 77°58′49″E Coordinates: 31°33′50″N 77°58′49″E
Construction began
1993
Opening date
2004
Construction cost
US $ 2 billion
Owner(s)
SJVN Ltd
Dam and spillways
Type of dam
Concrete gravity
Impounds
Satluj River
Height
62.5 m (205 ft)
Length
185 m (607 ft)
Dam volume
200,000 m3(261,590 cu yd)
Spillway capacity
5,660 m3/s (199,881 cu ft/s)
Reservoir
Total capacity
3,430,000,000 m3(2,780,746 acre·ft)
Active capacity
3,030,000,000 m3(2,456,461 acre·ft)
Surface area
234.5 m (769 ft)
Power station
Commission date
2004
Hydraulic head
428 m (1,404 ft)
Turbines
6 × 250 MW Francis-type
Installed capacity
1,500 MW


Project Layout :



fig : Nathpa Jhakri Project Location



fig : Nathpa Jhakri Project Layout


                                                         fig : Nathpa Jhakri Project


Scheduling and generation despatch
The scheduling and despatch of the Nathpa Jhakri Hydro Power plant is done by Northern Regional Load Despatch Centre which is the apex body to ensure the integrated operation of the power system grid in the Northern region and comes under Power System Operation Corporation Limited (POSOCO).

Sponsors and investors
  • Sponsor Nathpa Jhakri Power Corporation
  • Kvaerner / ABB / Siemens / Sulzer Escher Wyss
  • Impregilo / Foundation Corporation ( Construction)
  • BHEL

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