| Hydrology |
|
| Drainage Area |
1.250 km2 |
| Average Flow |
83.6 cms |
| Design Flood |
|
| (Probable Maximum Flood) |
13,000 cms (10,000 yr. return period) |
|
|
| Reservoir |
|
| Capacity (EI. 280.0) |
835 million cubic meters |
| Capacity (EI. 290.0) |
955 million cubic meters |
| Active Storage |
525 million cubic meters |
| Dead Storage |
310 million cubic meters |
| Flood Surcharge (EI. 280-290) |
120 million cubic meters |
| Surface Area at Maximum |
|
| Normal Water Level |
12.8 km2 |
| Maximum Normal Water Level |
EI. 280 masl |
| Maximum Exceptional Water Level |
EI. 290 masl |
| Minimum Normal Water Level |
EI. 225 masl |
|
|
| Dam |
|
| Type |
Central clay core rock fill dam
|
| Maximum Height |
200 m |
| Crest Level |
EI. 295 masl (plus 2 m camber) |
| Fill Volume (Including cofferdams) |
40 million cubic meters (approximate)
|
| Dam Length |
1.130 m |
| Slope |
2h:1v (upstream & downstream) |
| Crest Width |
12 m |
|
|
| Spillway |
|
| Type |
Concrete chute |
| Number of gates, type |
6, Hydraulically operated radial gates |
| Crest Elevation |
EI. 270 masl |
| Capacity |
12,800 cms w/ reservoir @ EI.289.3 |
|
|
| Power Tunnel |
|
| Size, lining length |
8.5 m dia (concrete-lined) |
|
8.2 m to 3.5m dia. (steel lined) |
|
1.3 km. long |
| Number of gates, type |
2 wheel gates w/ 2 slide-type guard gates |
|
|
| Turbines |
|
| Turbine type |
Vertical shaft Francis |
| Units |
3 |
| Max. Normal Gross Head |
180 m |
| Min. Gross Head |
125 m |
| Rated Head |
150.4 m |
| Installed Capacity |
411 MW at rated head |
| Flow Range (1 to 3 Units) |
40 to >270 cms |
|
|
| Generators |
|
| Type |
3 Vertical Shaft, Semi-Umbrella |
|
Synchronous Generator |
| Rated output (kVA) |
150,000 |
| Rated Voltage (V) |
13,800 |
| Frequency (Hz) |
60 |
| Synchronous Speed (rev/min) |
225 |
| Number of poles |
32 |
|
|
| Power Transmission |
|
| Switchyard type |
Step-up 13.8 to 230 kV |
| Line Type |
Double circuit |
| Length |
9 km |
|
|
| Low Level Outlet |
|
| Size, lining, length |
5.5 m dia., concrete lined, 1.3 km. long |
| Number of gates, type |
3 slide gates with 3 guard gates |
| Flow range |
90 to 480+ cms |
