Location: UTTARANCHAL

Capacity: [1000 MW]

The essntial works such as dam, intake, HRTs, transformer hall, and the various adits are already complete along with Tehri Stage-I works. Tehri PSP comprising of four reversible pump turbine units of 250 MW each, would involve construction of an underground machine hall on the left bank of river Bhagirathi. The main feature of the Project is the large variation of about 90m between the maximum and minimum head, under which the reversible units shall operate. The operation of Tehri PSP is based on the concept of recycling of water discharged between upper reservoir to lower reservoir. The Tehri Dam reservoir shall function as the upper reservoir and Koteshwar reservoir as the lower balancing reservoir. On completion, additional generating capacity of 1000 MW peaking power will be added to the Northern Region (annual generation of 1377 million units).With the construction of Tehri PSP, Tehri Hydro Complex will function as a major peaking station having an installed capacity of 2400 MW.

Essential works of Tehri PSP already completed along with the execution of Tehri Stage-I(1000 MW) are:

*Two head race tunnels for PSP,

*Intakes for HRTs of PSP,*Transformer hall constructed under Tehri Stage-I planned to accommodate generator transformers for PSP also,

*Main cable gallery, and

*Interface facility civil work.

Major works to be taken up in PSP involve construction of underground Power House cavern, Bus bar ducts and safts. Penstock assembly chamber, penstocks, upstream and downstream surge shafts, Tail race channels, TRT outlet structure and Appurtenant works. The Electro Mechanical works for Tehri PSP would be the design, supply and installation of the Power House Generation equipment, comprising reversible punp turbine sets along with auxiliaries.

Present Status: Major works have been planned for execution through a single turnkey EPC package to be invited under ICB. The bidding for EPC contract has been completed. Technocommercial & price bids were opened on 15.1.09. As L-1 price bid is more than the cost estimate of the project, revised has been prepared based on the price of L-1 bidder. The project is planned for commissioned in 54 months after award of EPC contract.

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