| Introduction : |
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| Teesta Stage-IV Hydroelectric Project is a run of the river scheme proposed along river Teesta as a part of cascade development of projects in Teesta basin. Teesta River is the largest river of Sikkim and about 95 % of the total area of the state falls under the catchment area of this majestic river. |
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| SALIENT FEATURES : |
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Location |
Village Chandey near Mangan in North Sikkim District of Sikkim |
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Approach |
Nearest Rail Head-New Jalpaiguri (150 Km). Nearest Airport-Bagdogra (175 Km) |
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Capacity |
520 MW (4 x 130 MW) |
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Annual Generation |
2373 MUs (in a 90% dependable year) |
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Project Cost |
Rs.3594.74 Crores (July 2009 Price Level) |
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Beneficiary States |
Sikkim, West Bengal, Bihar, Orissa, Jharkhand. |
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Year of Commissioning/Completion Schedule |
74 months from the date of Investment sanction by Govt. of India |
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| TECHNICAL FEATURES : |
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Diversion Structure/Dam : |
108.50 m high from deepest foundation level, Concrete gravity Dam |
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Water Conducter System : |
2 Nos., 8 m dia., 6.58 km and 6.47 km long, Head Race Tunnel |
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Surge Shaft : |
23m dia, 116.5m high |
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Pressure Shaft : |
4 Nos., 4.8m dia eacg, Vertical steel lined |
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Power house : |
Underground, with 4 units of 130 MW each, Francis Turbine. |
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Tail Race Structure : |
2 Nos., 8m dia, 622m and 627 m long Horse shoe shaped Tail Race Tunnel |
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