PROJECT LOCATION
Development Region: Eastern
Zone: Bagmati
District: Sindhupalchowk
Intake site: former Golche/Gumba VDC
Powerhouse site: Baikunthe village
GENERAL
Name of River: Balephi Khola
Nearest town: Kartike Bazaar
Type of scheme: Run of river
Gross head: 208.00 m
Net head: 202.24 m
Installed capacity: 36 MW
HYDROLOGY
Catchment Area at intake: 434.27 km2
Mean Annual discharge: 38.37 m3/s
Design discharge (at Q40PoE): 20.80m3/s
Riparian release: 0.764 m3/sec
Design flood discharge: 1606 m3/s (100 Yr. Flood)
Average Annual Precipitation: 1700-2700 mm
DIVERSION WEIR
Type of Weir: Gravity Free Flow concrete
Length of Weir: 41.50 m
Crest Elevation: EL. 1257.00 m
Intake Structure
Type: Side Intake
Size: 3.00 m x 3.5m (W x H)
Nos.: 2 (Two)
Elevation of intake invert: EL.1253.50 m amsl
FISH PASS
Size 0.60m x 0.60m (W x H)
Elevation 1256.4 amsl
UNDER SLUICE
Size 3.50 m x 4.00 m (W x H)
Nos. 1 (One)
Elevation of bottom sill EL.1251.00 m amsl
APPROACH CHANNEL
Size 3.0 m x 5.0 m (W x H)
Average Length 16.80 m
SETTLING BASIN
Type Surface
No of Basin 1 (One)
Size 115.00 (L) x 12.00 (W) x 10.10 m (H)
Transition Length 27.50 m
Particle Size to be settled 0.20 mm at 90% trap efficiency
Flushing type Pipe, 70m.
Flushing culvert size 0.80 m x 1.0 m (W x H)
BYPASS CHANNEL
Type Surface
No. of Channel: One
Size : 3.0m x 5.0m (W x H)
Length: 165 m
INVERTED SYPHON
Diameter: 3.20 m
Length: 180.00 m
Type: Steel pipe (12.00 mm) encased in 0.80m thick RCC
HEADRACE TUNNEL
Section Type: Inverted D
Length: 4447.80 m
Finish Diameter : (Concrete/Shotcrete) 3.40 m ~ 4.10 m
Support Shotcrete Lining: 2485 m
Concrete Lining: 991 m
Steel Lining: 360m (12mm thick, 3.2 dia)
SURGE SHAFT
Type: Underground, Circular
Finish Diameter: 8.00 m
Height: 43.82 m
Upstream surge water level (m) EL: 1273.88m amsl
Down surge water level (m) EL: 1237.69 m amsl
Ventilation Tunnel: 2.50 m Diameter, 30 m length
PENSTOCK PIPE
Material: Steel
Total length : 418.9.00 m, Dia3.00m
Material/Thickness: 12.00-32.00 mm
ANCHOR BLOCK
No: 6
POWERHOUSE
Type
: Surface
Int. Dimension : 48.40m (L) x 10m (W) x 14.81m (H)
Turbine Axis Level: EL. 1044.71 masl
TAILRACE
Type: Free Flow Box Culvert
Length : 164.30m
Size : 5.0m (B) x 3.5m (H)
Outlet Level
: 1046.50masl
TURBINES
Type of Turbine: Francis (Horizontal Axis)
No. of Units: Three
Rated Capacity Per unit: 12.65MW
Unit Discharge: 8.33 m3/s
Rated Speed: 750 rpm
Rated Efficiency: 92.70%
GENERATORS
No. of Units: Three
Type: Synchronous 3 Phase
Rated Capacity: 14.46 MVA
Power Factor: 0.85
Rated Speed: 750 rpm
Frequency: 50 Hz
Voltage : 11kV
Efficiency: 96.80%
TRANSFORMER
No. of Units: Ten (Nine + One)
Phase: Single
Voltage Level: 11kV/132kV
Type: Outdoor
Rated Capacity: 5.1 MVA
TRANSMISSION LINE
Voltage : 132kV
Length: 21km, ACSR Bear
Connection: Proposed Sub-station at existing Lamosanghu Substation