Teesta Urja Limited is seemingly on track to achieve the accelerated commissioning of schedule of March 2012 for commissioning all the six 200 MW units of the 1,200 MW Teesta Hydro Electric Project (HEP) Stage-III, in the North Sikkim district of Sikkim. - While as per the original schedule, only the first three units were slated to be commissioned in the 2011-12 fiscal, leaving the remaining units for 2012-13, the optimistic project developer is entertaining high hopes of putting the entire project on the bus bar within the 11th Plan.
- Importantly, around 11.3 km of head race tunnel (HRT) excavation work has already been wrapped up, out of the total 13.816 km. Besides, 94% tail race tunnel (TRT) excavation is completed, while excavation of diversion tunnel, flushing tunnel heading and all the access tunnels have also been completed.
- The 1,200 MW HEP involves construction of a 60 m high Concrete Faced Rockfill Dam (CFRD), near the village Chungthang, 400 m downstream of the confluence of the rivers Lachen Chu and Lachung Chu, and a 13.32 km long horse-shoe shaped HRT, with a diameter of 7.5 m for discharge of 175 cumecs of water. The project would include an underground power house for housing six shaft pelton wheel turbines of 200 MW capacity, each. The project, upon completion, is expected to generate 5,183 Giga-watt hour (GWh) of energy per year, assuming 90% performance levels. The project cost is estimated to be around Rs 5,705.55 crore.
- TUL, a special-purpose-vehicle (SPV) floated for implementation of the HEP, was awarded the project, on a build-own-operate-transfer (BOOT) basis, by the Government of Sikkim, which holds 26% of the equity of the company. TUL would be responsible for operating and maintaining the project for a period of 35 years subsequent to commissioning.
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