| 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 |
| General |
|
| 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 |
| Hydrology |
|
| 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 |
| Forebay |
|
| 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 |
| Powerhouse |
|
| Type: |
Surface |
| Size: |
28.50 m x 1.7 m |
| Water Level at Draft Tube: |
EL. 817 m |
| Tailrace |
|
| Type: |
RCC box and open |
| Length: |
29 m |
| Dimension: |
3.0 m (W) x 1.7 m (H) |
| Turbine |
|
| Type: |
Horizontal Axis, Francis |
| Number: |
Two (2) |
| Rated output capacity per unit: |
2,100 kW |
| Efficiency: |
90% |
| Governor |
|
| Type: |
Electronic with PID Control |
| Adjustment for speed Droop: |
Between 0 to 5% |
| Generator |
|
| 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% |
| Transformer |
|
| 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 |
Contract Agreement with Spark Hydroelectric Company Ltd.
HRE III
