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Project Title: Tinekhu Khola Small HP

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  • Task: Feasibility study

  • Capacity: 990 KW

  • Status: Completed

Salient features: as per Feasibility Study Report, 2010
Location Tinekhu Khola, Suri/Jhaku VDC’s, Dolkha District, Janakpur Zone, Central development region of Nepal
Latitude 27°44’07” N to 27°45’15” N
Longitude 86°10’45” E to 86°12’06” E.
Geology
Region Middle Mountain Zone
Rock composed Quartzite, Schist, Augen Gneiss, Phyllite
Geotechnical zoning Fair to good
Hydrology
Catchment area 21 km2
90% firm flow in the driest month 250 lps
Design flow (Q57) 350 lps
Flood 1 in 100 years 127 m3/sec
Weir
Type Concrete and gabion
Length 18.25m
Crest level 1398.6 m amsl
Intake
Type Side intake
Number of orifice 3
Orifice Size 0.4 x 1.00 m (w x h)
Sill level upper orifice 1398.90 m amsl
Sill level bottom orifice 1397.90 m amsl
Number of gates 2
Gravel trap
Type Surface
Length 3.0 m (including transition)
Width 1.5 m
Height 2.8 m
Normal water level 1398.30 m amsl
Spillway level 1398.60 m amsl
Gravel Flushing Canal
Type Surface
Length 7.40 m
Breadth 0.5 m
Height 0.5 m
Number of gates 2 nos.
Approach canal
Type Reinforced concrete rectangular culvert
Length 9.15 m
Bottom width 0.8 m
Height 0.8 m
Settling basin
Type Surface
Size 23.5 x 1.5 x 3.0m (l x b x h)
No. of chambers 2
Normal water level 1398.27 m amsl
No. of flushing channel 2
Sediment Flushing Channel
Type Surface
Length 8.0 m
Breadth
Height 0.5 m
No. of gates 2
Headrace pipe
Material High Density Polyethylene (HDPE)
Length 2046 m
Internal diameter 500 mm
Anchor blocks 43 nos.
Forebay
Type Surface
Width 3.5 m
Length 4.0 m
Height 4.0 m
Water level 1387.34 m amsl
Penstock Pipe
Material Steel
Length 960 m
Internal diameter 450 mm
Thickness 8-32 mm
Anchor blocks 16 nos.
Saddle support 107 nos.
Y-Bends 1 no.
Branching 2 pipes of 320 mm internal diameter, 20 m long
Powerhouse
Type Surface
Length 16.5 m
Breadth 8.0 m
Height 12 m (from foundation level)
Number of generating units 2 (Two) each 495 MW
Turbine type Horizontal Axis Pelton Turbine
Installed capacity 990 KW
Turbine axis level 985.61 m amsl
Tailrace
Type Rectangular box culvert
Length of closed duct 40.8 m
Transmission Facilities
Transmission line Length 3 km from Powerhouse to to Singati Sub-station
Voltage level 11 KV
Power and Energy
Gross Head 412 m
Net Head at design discharge 388.40 m
Installed Capacity 990 KW
Gross Annual Energy 7.48 GWh
Net Annual energy 7.10 GWh
Wet Energy 5.20 GWh
Dry Energy 1.90 GWh
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