department of power annual report 1991-92 - Ministry of Power

Salient Features:
A 260.5 metres high earth and rockfill dam, across
the river Bhagirathi at Tehri, just after its confluence
with river Bhilangana for creating a storage reservoir
to generate power and provide irrigation facilities.
• An underground power house of 1000 MW (4x250
MW) capacity with conventional turbine-Generating
sets under Stage-I at Tehri.
• Second underground power house of 1000 MW
(4x250 MW) capacity with reversible pump turbine
sets under Stage-II at Tehri Pump Storage Plant).
• A 103.5 metre high concrete dam (which will
provide a balancing reservoir) with a surface power
house of 400 MW (4x100 MW) capacity at
Koteshwar, 22 Km, downstream of Tehri dam site
across the river Bhagirathi.
• Transmission system for evacuation of power
generated Tehri at an Koteshwar projects, through
two single circuits 6765 KV lines to Meerut for
utilisation in Northern Region.
The esimated cost of the entire Tehri Hydro Power
Complex is Rs. 5058 Crores at December, 1991
price level. An expenditure of about Rs. 653 Crores
has been incurred on the project till December, 1991.
Project Status
• Infrastructure woks completed.
• 4 Nos. diversion tunnels 11 M dia each completed.
• 4 Nos. 8.5 M dia each Head Race Tunnel excavation
completed and lining works is nearing completion.
• Various approach adits to underground Power House
cavern completed.
• Foundation work of Coffer Dam & the Main Dam
have been completed and dam raised to RL. 615
metre throughout its length.
45
PROJECT COST AND COMMISSIONING
SCHEDULE
(Rs. in Crores)
PROJECT ESTIMATED COST COMMISSIONING
(AT DEC., 1991 SCHEDULE
PRICE LEVEL) (PLANNED)
i) Tehri Dam & HPP
(4x250 MW)
2618 1996-97
ii) Koteshwar Dam & HPP
(4x100 MW)
654 1996-97
iii) Tehri Pump Storage
Plant (4x250 MW)
1090 1996-97
iv) Associated Transmission
System (800 KV)
696 1996-97
Total 5058
6.28 NATHPA JHAKRI POWER
CORPORAION LTD. (1500 MW)
Nathpa Jhakri Power Corporation (NJPC) was
incorporated on 24th May, 1988 as a Joint Venture of
Govt. of India and Government of Himachal Pradesh both
sharing the cost of the projects in the ratio of 3:1
respectively to plan, promote, organise and execute
Hydroelectric Power Projects in the Satluj river basin in
Himachal Pradesh.
NJPC is presently executing its first project Nathpa Jhakri
Hydro-electric Project (Installed Capacity=1500 MW) in
Distt. Kinnaur/Shimla (HP) for which World Bank has
sanctioned a Loan of US # 437 million. Besides this
project, NJPC has taken up pre-construction planning of
Kol Dam Project (I.C. = 800 MW).
Main Features of Nathpa Jhakri Project
The Nathpa Jhankri Power Project envisages the
construction of:
- 60.50 m high concrete dam on Satluj river at Nathpa
to divert 405 cumecs of water through four intakes.
- underground desilting complex, comprising four
chambers, each 525 m long, 16.31 m wide and 27.5
m deep, one of the largest underground complex in
the World.