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Teesta - Ministry of Power

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3<br />

Preliminary Feasibility Report<br />

<strong>Teesta</strong> (I) HE Project (4 x 80 MW)<br />

Location <strong>of</strong> <strong>Power</strong> House Just U/S <strong>of</strong> confluence <strong>of</strong> Zemu chu with<br />

<strong>Teesta</strong><br />

Latitude & Longitude <strong>of</strong> <strong>Power</strong> House 27º45’50’’ & 88º32’30’’<br />

Nearest Rail head New Jalpaiguri<br />

Nearest Airport Bagdogra<br />

HYDROLOGY<br />

Catchment area Dam -I 881 km 2<br />

Catchment area Dam-II 600 km 2<br />

Design Flood for Dam -I 1600 m 3 /sec<br />

Design Flood for Dam-II 1300 m 3 /sec<br />

DIVERSION TUNNELS<br />

Diameter & Shape (for both DT’s) 6 m, Horse-shoe shaped<br />

Length <strong>of</strong> DT for Dam-I 600 m<br />

Length <strong>of</strong> DT for Dam-II 300m<br />

Diversion Discharge(for both DT’s) ± 400 m 3 /sec<br />

Diversion Tunnel Gate 1 No. Vertical lift gate<br />

Size <strong>of</strong> Gate 6m × 8m<br />

COFFER DAMS (for both dams)<br />

Type Rockfill with central clay core.<br />

Maximum height <strong>of</strong> upstream c<strong>of</strong>fer dam ± 15.0 m<br />

Maximum height <strong>of</strong> downstream c<strong>of</strong>fer<br />

dam<br />

CONCRETE DAM-I<br />

± 8.0 m<br />

Type Concrete Gravity

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