Salient Technical Features
Item |
Description |
| Concession Period | 30 years (commencing at COD) |
| Design Discharge (Project) | 1260 m3/sec |
| Rated Net Head | 61.7 m |
| Gross Generation at Generator Terminals | 3299 GWh |
| Net Generation | 3265.81 GWh (net of auxiliary consumption) |
| Plant Factor | 53.6 % |
Power Purchaser |
Central Power Purchasing Agency Guarantee Limited |
DAM & SPILLWAY: |
|
| Dam Crest Level | 535 m.a.s.l |
| Crest El. of overflow section | 526 m.a.s.l |
| River Bed level at Dam | 450 m.a.s.l |
| Maximum Reservoir Level at Dam (PMF) | 535 m.a.s.l |
| Maximum flood (PMF) | 35,650 m3/sec |
| Spillway Gates – type | 7 nos radial with overspill capacity |
| Spillway Gates - size | Width 14m x Height 20m |
| Low level Outlet Gates –type | 2 No. radial gates |
| Low level Outlet Gates –size | Width 6.75m x Height 8m |
Roller Bucket Energy Dissipator - invert level |
450 m.a.s.l |
HEADRACE & PENSTOCK: |
|
| Four (04) Tunnels-Overall Lengths | 122m/136m/160m/184m |
| Design discharge (Unit) | 315 m3/sec |
Headrace / Penstock Diameter |
8.2m |
DIVERSION TUNNEL: |
|
| Tunnel length | 400 & 495 m |
| Tunnel width | 12.5 m |
Tunnel height |
14 m |
POWERHOUSE: |
|
| Accommodation | Surface loading bay building, underground machine hall. The main transformer is located on the surface near powerhouse entrance. |
| Surface building (length x width) | 40m x 20m |
| Surface building cranage | 1 x OET |
| Crane capacity | 275/25/5 tonnes |
| Machine Hall (length x width) | 170m x 20m |
| Machine Hall cranage | 2 x OET |
| Crane Capacity | 275/25/5 tonnes |
| Turbine generators installed | 4 No. |
| Type of Turbine, power (each) | Francis, 175.175 MW |
| Speed | 111.1 rpm |
| Discharge max, min (per turbine) | 315m3/s, 189 m3/sec |
Generator Transformers |
Single phase, 12 No. |
TAILRACE TUNNEL: |
|
| Tunnel U1 | Length 150m. Cross section 8.5m x 9.5m; U shaped |
| Tunnel U2 | Length 184m. Cross section 8.5m x 9.5m; U shaped |
| Tunnel U3 | Length 211 m; Cross Section 9.5 m x 10.5 m; U shaped |
| Tunnel U4 | Length 238 m; Cross Section 9.5 m x 10.5 m; U shaped |
| Tunnel Discharge Capacity | 315 m3/sec |
| Maximum Tailwater Level with 4 units in operation at rated discharge | 461.76 m.a.s.l. |
| Maximum Tailwater Level with one unit in operation at rated discharge | 461.08 m.a.s.l. |
Maximum Tailwater Level (PMF) |
503 m.a.s.l. |
RESERVOIR: |
|
| Full Supply Level | 526 m.a.s.l. |
| Reservoir Length | ~22 km |
| Reservoir Area | 3.8 km2 |
Note:All of the above data is based on the Project Feasibility Stage design and the Optimized Feasibility Design as approved by POE of PPIB.