| Project Type | RoR | PRoR |
| PROJECT LOCATION | |
| Location | |
| | Region | : | Eastern | Eastern |
| | Province No. | : | One | One |
| | District | : | Solukhumbu | Solukhumbu |
| | Rural Municipality | : | Chheskam VDC (Now, Mahakulung Rural Municipality) | Chheskam VDC (Now, Mahakulung Rural Municipality) |
| Project Boundary | |
| | East | : | 86°52’53″E | 86°52’53″E |
| | West | : | 86°54’31″E | 86°54’31″E |
| | South | : | 27°32’08″N | 27°32’08″N |
| | North | : | 27°34’40″N | 27°34’40″N |
| GENEARL | |
| River | : | Hongu | Hongu |
| Nearest Town | : | Salleri | Salleri |
| Type of Scheme | : | Run-of-River | Peaking Run-of-River |
| Highest Regulated Water Level | : | | 1966 masl |
| Lowest Regulated Water Level | : | | 1961 masl |
| Peaking Period | : | | 1-hour morning and 1-hour evening |
| Reservoir Volume | : | | 46,442 m3 |
| Dead Storage Volume | : | | 10,600 m3 |
| Live Storage Volume | : | | 32,000 m3 |
| Gross Head | : | 310 m | 314 m |
| Rated Net Head | : | 294 m | 294 m |
| HYDROLOGY | |
| Catchment Area | : | 321.5 km2 | 321.5 km2 |
| Design Discharge | : | 11.71 m3/s | 11.71 m3/s |
| Minimum Downstream Release | : | 0.397 m3/s | 0.397 m3/s |
| POWER AND ENERGY CALCULATIONS | |
| Installed Capacity (MW) | : | 28.9 MW | 28.9 MW |
| Total Saleable Energy | : | 167.43 GWh | 167.43 GWh |
| | Dry Energy | : | 31.49 GWh | 51.85 GWh |
| | Wet Energy | : | 135.94 GWh | 115.58 GWh |
| DIVERSION TUNNEL | |
| Type | | : | Unlined | Unlined |
| Length | | : | 84 m | 84 m |
| Size (B x H) | | : | 3 m x 3 m | 3 m x 3 m |
| Slope | : | 0.097 | 0.097 |
| DIVERSION WEIR | |
| Type | : | Ogee shaped Concrete Gravity Dam | Ogee shaped Concrete Gravity Dam with free overflow spillway |
| Dam Length | : | 15.2 m | 20.2 m |
| Dam Height (from river bed) | : | 7.0 m | 13.0 m |
| UNDERSLUICE | |
| Size (B x H) | : | 5 m x 2.5 m | 5 m x 3 m |
| No. of Gates | : | 1 | 2 |
| INTAKE | |
| Type | : | Side Intake with submerged orifice | Side Intake with submerged orifice |
| Size of Intake Opening (B x H) | : | 4.0 m x 2.4 m | 4.0 m x 2.4 m |
| No. of Openings | : | 2 | 2 |
| Velocity of Flow at Intake Trash-rack | : | 0.6 m/s | 0.6 m/s |
| Trash-rack Cleaner | : | Manual by raking | Manual by raking |
| GRAVEL TRAP | |
| Average Length | : | 7.6 m | 7.6 m |
| Size (B x H) | : | 2.7 x 3.0 m | 2.7 x 3.0 m |
| GRAVEL TRAP FLUSHING CULVERT | |
| Length | : | 13.0 m | 13.0 m |
| Size (B x H) | : | 1.3 x 1.3 m | 1.3 x 1.3 m |
| APPROCH TUNNEL | | | |
| Type | : | Inverted D-shaped unlined and partially concrete lined tunnel | Inverted D-shaped unlined and partially concrete lined tunnel |
| Depth | : | 3.5 m | 3.5 m |
| Width | : | 3.5 m | 3.5 m |
| Bed Slope | : | 1 in 200 | 1 in 200 |
| Length | : | 255 m | 255 m |
| BRANCH TUNNEL (TO SETTLING BASIN) | |
| Type | : | Inverted D Shaped Concrete Lined | Inverted D Shaped Concrete Lined |
| Length | : | 92 m (46 m each) | 92 m (46 m each) |
| Size | : | 2.5 m x 2.5 m | 2.5 m x 2.5 m |
| SETTLING BASIN | |
| Type | : | Hopper shaped underground with mechanized flushing | Hopper shaped underground with mechanized flushing |
| Sediment Size to be Settled | : | 90% of 0.2 mm | 90% of 0.2 mm |
| No. of Bays | : | 2 | 2 |
| Length | : | 100 m | 100 m |
| Width of uniform section | : | 8.0 m | 8.0 m |
| Depth of uniform section (spring line to hopper top) | : | 5.7 m | 5.7 m |
| Depth of hopper | : | 2.2 m | 2.2 m |
| LINK TUNNEL (SETTLING BASIN TO HRT) | |
| Type | : | Inverted D Shaped Concrete Lined | Inverted D Shaped Concrete Lined |
| Length | : | 82 m (41 m each) | 91 m (45.5 m each) |
| Size | : | 2.5 m x 2.5 m | 2.5 m x 2.5 m |
| ADIT/ACCESS/FLUSHING TUNNEL | |
| Total Length | : | 417 m | 487m |
| Size | : | Various | Various |
| HEADRACE TUNNEL | |
| Type | : | Low Pressure Tunnel | Low Pressure Tunnel |
| Total Length (starting from link tunnel) | : | 2 890 m | 2 890 m |
| Excavated size of Tunnel (B x H) | : | 3.5 m x 3.5 m | 3.5 m x 3.5 m |
| Shape | : | Inverted D-shaped | Inverted D-shaped |
| SURGE SHAFT | |
| Type | : | Simple, Vertical Shaft Underground, RCC Lined | Restricted Orifice Type or Steel Pipe |
| Finished Diameter | : | 6.0 m | 6.0 m |
| Upsurge Level | : | 1 968.7 masl | 1 974.7 masl |
| Down-surge Level | : | 1 947.3 masl | 1 947.3 masl |
| Top of surge shaft | : | 1 985.0 masl | 1 979.0 masl |
| Total Height | : | 45 m | 36.5 m |
| HEADRACE PIPE | |
| Material | : | | MS Pipe |
| Length (including embedded in HRT) | : | | 245 m |
| Diameter | : | | 2.5 m |
| PENSTOK PIPE | |
| Surface Pipe | : | 662 m length, 2.0 m dia. | 570 m length, 2.0 m dia. |
| Diameter of penstock | : | 2 000 mm before branching | 2 000 mm before branching |
| Vertical Shaft with penstock | : | 141 m length, excavated dia 3.2 m. | 141 m length, excavated dia 3.2 m. |
| Inclined Shaft with penstock | : | 167 m length, excavated width 3.0 m | 167 m length, excavated width 3.0 m |
| Penstock on Surface | : | 22 m length | 22 m length |
| Branch pipe | : | 77 m (dia 1.3 m and 0.9 m) | 77 m (dia 1.3 m and 0.9 m) |
| Thickness | : | 8 mm to 30 mm | 8 mm to 30 mm |
| Material | : | Mild steel | Mild steel |
| POWERHOSUE | |
| Type | : | Semi-surface | Semi-surface |
| Size (L x B x H) | : | 38 m x 17 m x 17 m | 38 m x 17 m x 17 m |
| TAILRACE CULVERT | |
| Type | : | RCC box culvert | RCC box culvert |
| Length | : | 25 m | 25 m |
| Size (B x H) | : | varies | varies |
| TURBINE | |
| Type | : | Pelton, 4 jets | Pelton, 4 jets |
| No. of Units | : | 2 | 2 |
| Rated output | : | 15 000 kW | 15 000 kW |
| Max. Efficiency | : | 90.50% | 90.50% |
| Speed | : | 428.6 RPM | 428.6 RPM |
| GENERATOR | |
| No. of Units | : | 2 | 2 |
| Efficiency | : | 98% | 98% |
| Generation voltage | : | 11 kV | 11 kV |
| Rated output | : | 18 MVA | 18 MVA |
| Frequency | : | 50 Hz | 50 Hz |
| Transformer | | | |
| No. of Units | : | 3 +1 spares | 3 +1 spares |
| Efficiency | : | 99% | 99% |
| Rated Output | : | 12 MVA | 12 MVA |
| TRANSMISSION LINE AND GRID CONNECTION | |
| Length | : | 39 km, to Lamane s/s at Tingla | 39 km, to Lamane s/s at Tingla |
| Voltage | : | 132 kV, Single Circuit | 132 kV, Single Circuit |
| CONSTRUCTION PERIOD | : | 3 Years | 3.5 Years |
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