Due Diligence and Short Term Study

Project Title: Upper Puwa I HP

  • Task: Due Diligence study of Upper Puwa I Small Hydropower Project

  • Capacity: 3MW

  • Status: completed

Salient features as per PPA:
Project location
Development Region: Eastern
Zone: Mechi
District: Ilam
Intake site: Shanti Danda/ Barbote VDCs
Powerhouse site: Barbote VDC
Geographical coordinates:
Latitude: 270 17′ 13″ N to 270 19′ 27″ N
Longitude: 860 42′ 55″ E to 860 46′ 05″ E
Name of River: Puwa Khola
Nearest town: Ilam Bazaar
Type of scheme: Run-of-River
Gross head: 125 m
Net Rated head: 116.91 m
Installed capacity: 4000 kW
Average annual energy after outage: 23.112 GWh
Catchment Area: 94 km2
Mean Annual discharge: 7.544 m3/s
Design discharge (40% PoE) 4.46 m3/s
Riparian release: 0.108 m3/s
Design flood discharge: 588 m3/s (100 years flood)
Average Annual Precipitation: 1632 mm
Diversion Weir
Weir Type: Concrete Weir
Length: 43.0 m
Weir Crest Level: EL 942 m
Maximum Weir height: 6.0 m above foundation to crest
Intake Structure: Side intake
Openings: 3.00 m x 1.00 m, 2 nos.
Desanding Basin
Type: Surface, Rectangular
Length: 50 m
Size (WxD): 4.60 m x 3.60 m
Nos of Bays: 2
Particle size to be removed: <0.2 mm
Headrace Canal
Type: Free Flow, Rectangular RCC
Length: 3100 m
Size: 2.25 m X 1.7 m
Type: RCC, Rectangular, Surface
Capacity of Forebay: 837 m3
Surface Area: 60 m (L) x 30 m (W)
Normal Water Level: EL. 938 m
Steel Penstock Pipe
Type: MS welded Pipe
Internal diameter: 1.3 m
Length: 360 m (before bifurcation)
Max Steel Thickness: 10 mm
Nos of Anchor Blocks: 9
Type: Surface
Size: 28.50 m x 1.7 m
Water Level at Draft Tube: EL. 817 m
Type: RCC box and open
Length: 29 m
Dimension: 3.0 m (W) x 1.7 m (H)
Type: Horizontal Axis, Francis
Number: Two (2)
Rated output capacity per unit: 2,100 kW
Efficiency: 90%
Type: Electronic with PID Control
Adjustment for speed Droop: Between 0 to 5%
Type: Synchronous 3 phase
Rated output capacity per unit: 2,352 kVA
Power factor: 0.85
Voltage: 6.3 kV
Frequency: 50 Hz
No. of units: Two (2)
Excitation system: Brushless
Efficiency: 96%
Type: Three phase, ONAN
Nos of Unit: 2 (Two)
Rated capacity: 2,500 kVA
Vector Group: YND 11
Voltage ratio: 33/6.3 kV
Efficiency: 99%
Transmission Line
Voltage level: 33 kV
Length: 4 km
Conductor: ACSR “DOG”
From: Powerhouse
To: NEA, Godak Sub-Station
Project Cost Estimate
Total cost of the project: NPR 613,868,000.00
Construction Period: 24 months
Recent News
recentImage Contract Agreement with Citizens Bank International Limited and Him Parbat Hydro Power Pvt. Ltd for Due diligence Study
Sanima Hydro & Engineering Pvt. Ltd signed a Tripartite contract agreement with Citizens bank International Limited and Him Parbat Hydropower Pvt. Ltd to conduct Due Diligence study of Sagu Khola Hydropower Project (20 MW) on the 27th of September 2020. The Project is Run of River (RoR) located at Dolakha District. Read More »
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