1.0 BACKGROUND
Tehri PSP is envisaged to generate 1000 MW peaking power to enhance system reliability and to provide balanced power to thermal and renewable generation during off peak hours. The reservoirs created by Tehri Dam and Koteshwar Dam will act as upstream and downstream reservoirs for the pumped storage plant. This plant will contribute in stabilization by meeting peak load and balancing requirement. Tehri PSP consists of four reversible units of 250 MW each, involves construction of underground machine hall on the left bank of river Bhagirathi. The main feature of the project is that it has a large head deviation of about 90 m between the maximum and minimum head from which the reversible units will operate. The operation of Tehri PSP is based on the concept of recycling of water between the upper reservoir and the lower reservoir. On completion of the project, there will be an additional generation capacity of 1000 MW (annual generation 2442 million units) of peaking power in the northern region. The pumping operation of the reversible units will require 3075 MU of peak power. With the construction of Tehri PSP, the Tehri Hydro Power Complex will have a capacity of 2400 MW. It will serve as the major peaking power station with an installed capacity of 2400 MW.
2.0 PROJECT APPROVAL
Government of India approved the execution of Pumped Storage Plant (4x250 MW) in July 2006 at a cost of Rs. 1657.60 crore including IDC of Rs. 81.64 crore at December 2005 price level with debt equity ratio of 70:30.
3.0 REVISED COST ESTIMATE
Revised Cost Estimate-II: Approved RCE-II of Tehri PSP is Rs. 4825.60 Cr at Feb'2019 PL.
Revised Cost Estimate-III: Preparation of RCE-III at Feb’25 PL.
4.0 Expected Commissioning of Project
Unit-1: COD declared w.e.f. 00:00 hrs. of 07.06.2025.
Unit-2: COD declared w.e.f. 00:00 hrs. of 10.07.2025.
Unit-3 & 4: Mid Nov’25 & Dec’25 respectively.
