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1.Project Name |
Jum Khola Jalvidhyut Aayojana (56 MW) |
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2. Project Location |
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Province |
Bagmati |
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District |
Dolakha |
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Intake Site |
Bigu Rural Municipality-1 |
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Powerhouse Site |
Bigu Rural Municipality-1 |
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Geographical Co-ordinates |
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Latitude |
27°56'40" N to 27°58'23" N |
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Longitude |
86°12'47" E to 86°15'00" E |
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3. General |
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Name of River |
Jum Khola |
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Nearest village |
Lamabagar |
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Type of Scheme |
Run-off-River (RoR) |
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Gross Head |
254 m |
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Net rated Head |
249.62 m |
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Installed Capacity |
56 MW |
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Average Annual Energy after Outage |
324,754,069 KWh |
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Dry Seasonal Energy |
97.41 GWh (30 % of total energy) |
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Wet Seasonal Energy |
227.34 GWh (70 % of total energy) |
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4. Hydrology |
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Catchment Area |
992 Km2 |
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Mean Annual Discharge |
50.25 m3/s |
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Design Discharge (at 41.11% PoE) |
25.45 m3/s |
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Riparian Release |
10% of monthly flow |
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Design Flood Discharge |
814.95 m3/s (100 years return period) |
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5. Diversion Weir |
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Type of Weir |
Concrete, free flow weir |
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Length of Weir |
36 m |
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Crest Elevation |
2300 m amsl |
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Height |
10 m (from riverbed level) |
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6. Approach Culvert/ Tunnel |
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Type |
Culvert/ Inverted D shaped tunnel |
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No. of culvert/ tunnel |
3 |
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Total length |
230 m |
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7. Settling Basin |
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Type |
Underground (3 bays) |
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Dimension (L x B x H) |
68 m x 12 m x 7.5 m |
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8. Headrace Tunnel |
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Type |
Inverted D shaped headrace tunnel |
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Internal Dimension/ Size |
4.4 m x 4.4 m |
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Length |
1519 m |
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9. Surge Shaft |
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Type |
Steel with concrete casing |
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Diameter |
387 m (Vertical-222 m, Horizontal including bifurcations-165 m) |
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Height |
4.25 m (Vertical shaft) |
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10. Penstock Shaft |
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Material |
Steel with concrete casing |
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Length |
387 m (Vertical-222 m, Horizontal including bifurcations-165 m) |
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Diameter |
4.25 m (Vertical shaft) |
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Size (W x H) |
4.5 m x 5 m (Horizontal shaft) |
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11. Powerhouse |
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Type |
Underground |
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Size (L x W) |
75 m x 15 m |
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Height |
35 m |
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12. Tailrace |
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Type |
Inverted D shaped tunnel |
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Tailrace Length |
703.64 m |
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Size (W x D) |
4.5 m x 5 m |
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13. Turbine |
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Type |
Vertical axis Francis turbine |
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Number |
4 |
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14. Access Road/Tunnel/Ropeway |
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Surface Road |
4.36 km |
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Tunnel |
0.498 km |
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Ropeway |
0.275 km |
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15. Transmission Line |
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Voltage Level |
132 kV (Double Circuit) |
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Length |
37 km |
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Conductor Type |
ACSR BEAR |
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From |
Powerhouse |
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To |
Garjyang Substation |
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16. Construction Period |
4 Years |
