Ambeshwar Engineering Hydropower Pvt. Ltd (AEHPL), a company registered under the Government of Nepal Act 2063 is set upping 180 MW Kaligandaki Koban Hydroelectric Project in Mustang District, Nepal. The project would affect Koban, Kunjo and Lete VDCs of the district. The project at a distance of 125 km from Pokhara would be built on the Kali Gandaki River. The estimated cost of the project is Rs 40 billion. The project would be constructed under financial assistance from international donor agencies. Major share holder of the company is Essar Power, India. Essar Power, amongst India’s largest power generation companies in the private sector, has a total installed generation capacity of 3,910 MW
Salient Features
|
BASELINE |
RESERVOIR, STRUCTURE AND PLANT CHARACTERISTICS |
PHYSICAL PARAMETERS FOR 180 MW |
| GENERAL | Catchment AreaEstimated Specific Runoff
Mean Annual Flow Mean Annual Yield FSL MDDL Depletion Turbine Level Gross Head Design Discharge Plant Capacity Combined Total Dead Storage Total Live Storage Single Turbine Capacity Bypass Tunnel Length Minimum Peaking Duration |
3474km212l/s/km2
1.8 m3/s 1318 million m3 2530masl 2511 masl 19 m 1910 masl 620 m 35 m3/s 180 MW 4 million m3 26.2 million m3 60 MW 2.1 km 7 hours |
| LOWER RESERVOIR | FSLMDDL
Dead Storage Live Storage Combined Storage Volume Minimum Time for Continuous Reservoir Operations Without Interruptions |
2530masl2511 masl
4.7 million m3 5.1 million m3 9.8 million m3
40 hours |
| UPPER RESERVOIR | Maximum Flood Level During MonsoonMaximum Operating Level During Monsoon
MDDL |
2521masl
2520.5 masl 2508.1masl |
| FLOOD DISCHARGEDESIGN | 1000 years10,00 years
PMF |
1000m3/s1400m3/s
3200m3/s |
| MAIN CFRD DAM AT LOWER RESERVOIR | Free BoardCrest Level
Crest Wall Top Concrete Top Foundation Level Dam Height |
3m2533masl
2534 masl 2534masl 2490 masl 44m |
| INTAKE AT LOWER RESERVOIR | No. of Gates (Vertical)Width
Height Nos. of Trash Racks Trash Rack Height Trash Rack Width Bottom Level of Trash Rack |
23m
4m 2 7m 4m 2505 masl |
| SPILLWAY AT LOWER RESERVOIR | Spillway Crest LevelNo. of Gates Radial Type
Width Height |
2519masl2
11m 8m |
| SLUICEWAY AT LOWER RESERVOIR | Bottom of Stop LogNo. of Gates Radial Type
Width Height |
2498masl2
4m 6m |
| RD DAM AT UPPER RESERVOIR (Guiding Structure) | Dam TypeCrest Level
Foundation Level Dam Height Approx. Crest Length |
Rockfill2522masl
2504 masl 18m 320m |
| SLUICEWAY AT UPPER RESERVOIR | Sill LevelNo. of Gates Radial Type
Width Height Approx. Length of Bridge Deck Bridge Deck Level |
2508masl2
8m 12.5m 35m 2533 masl |
| LATERAL CHANNEL WEIR AT UPPER RESERVOIR(Intake for the Bypass Tunnel) | LengthSill Level
Invert Level |
50m2519.8
2512 masl to 2514 masl |
| STILLING BASIN AT UPPER RESERVOIR(Downstream of Sluice) | Approx. LengthWidth
Invert Level |
40m22m
2502 masl |
| UNLINED HEADRACE TUNNEL | TypeLining
Flow Regime Velocity Unlined Section Finished Diameter Finished Area Total Length U/S Invert Level D/S Invert Level |
HorseshoeShotcrete
Low Pressure 1.5m3/s 24.18 m2 5.4m 5.4m 5.5 km 2498 masl 2460 masl |
| CONCRETE LINED SECTION OF HRT | TypeVelocity
Finished Cross Sectional Area Finished Diameter Total Length |
Horseshoe2.5 m3/s
16.1 m2 4.2m 1.36 km |
| SURGE TUNNEL | TypeLining
Top Level Inclination Diameter Total Length |
Circular80% shotcrete lined
2580 masl 1/7 5.2m 840m |
| PRESSURE SHAFT | LiningVelocity
Section Finished Diameter Bottom Level Total Length |
Steel5m/s
7 m2 3m 1915 masl 545m |
| STEEL INLET CONDUIT&MANIFOLD | VelocityNo. of Branches
Cross Sectional Area Diameter |
5.1m/s3
2.3 m2 1.71m |
| TAILRACE TUNNEL | TypeFlow Regime
Concrete Lining in Tunnel Velocity Cross Sectional Area Width Height Outlet Invert Level
|
Inverted D ShapedOpen Channel
30% of Total Length 1.5 m3/s 30 m2 4.6m 4.6m 1900masl
|
| BYPASS TUNNEL | Type
Flow Regime Design Discharge Length Maximum Velocity Section Approximate Slope Tunnel Width Tunnel Height Invert Level U/S Outlet Level Drop |
Inverted D Shaped and UnlinedOpen Channel
250m3/s 2.1 km 5.7m/s 43.75m2 1% 7m 7m 2508masl 2489masl 19m
|
| POWER STATION | Nominal Installed CapacityNo. of Power Units
Generator Floor (W*L*H) Turbine Type Nominal Discharge Turbine Center Elevation Gross Head Rated Power Output Rated Speed Average Annual Production |
180 MW3
15x75x30m Pelton 11.7m3/s/unit 1910 masl 620m 180 MW 500 rpm 953.5GWh
|
| TRANSFORMER CAVERN | No. of TransformersType
Voltage Area (W*L*H) |
10Mono Phase
220kV 11mx64mx13m |
