Introduction:

Puwa II is the first project being developed by People’s Power Limited in Puwa Khola in Ilam district. The capacity of the project is 4.96 megawatt (MW). The Puwa II hydroelectric project is located in Ilam Municipality ward no 1, Sakhejung and ward no 4 Maipokhari.

This project has a very easy road access.  It is 680 KM to reach Ilam Bazar from Kathmandu via road transportation. Similarly, Ilam can be reached; Kathmandu to Bhadrapur via airplane and Bhadrapur to Ilam via 100 KM road transportation. It is 14 KM to get project’s water intake location which is in the Mechi highway. It is 8 KM road transportation to get headworks and Power house from water intake. Having easy road access to powerhouse and water intake is an added value for this project.

Financial Aspect:

Total investment of this project is 90 Crore where 60 Crore will be generated by Bank Loan and 30 Crore will be collected by promoter’s investment. It is projected to produce 2,79,76,623 units electricity in every year where 1,95,71,299 units will be produced in wet season in 6 months and 84,05,324 units in the dry season in 6 months. Selling price will be 4.8/unit in wet season and 8.4/unit in dry season.

Silent Features:

River	Puwa Khola
Municipality	Ilam (Sakhejung & Mai Pokhari)
District	Ilam
Zone	Mechi
Catchment Area	63.9 Sq Km
Design Discharge	2.72 Cum/Sec.
Marketable Annual Energy	27.98 GWh
Weir
Type of Weir	Ogee type
Size of Weir	2.3 m length x 1.7 m width
Weir Crest Level	El. 1195 m
Flood Discharge(1:100 yrs)	348 cum/sec
Headworks
Type of intake	Side intake
Size of intake	2.0mx0.8m
Orifice Top level	El. 1195m
Gravel Trap
Section	Rectangular
Size(WxH)	5m x 3.5 m
Length	8.00 m
U/S Transition Length	3.0 m
Spillway Type	Overflow side spillway
Spillway Length	10.00 m
Gravel Flushing Gate Size	0.7 m x 0.7 m (1 number)
Headrace  Canal
Section	Rectangular covered concrete canal
Size(WxH)	1.7 m x 1.2 m
Length	270 m
Hydraulic Slope	1:500
Desanding Basin
Type	Dufour, Continuous/Intermittent      flushing
Size(LefxBxH)	51.0 m x 8.0 m x 6.00 m
Transition Length	13.0 m
Desanding Chambers	2 no.
Particle Size to be settled	0.20 mm
Flushing Gate Size	1.0 m x 1.0 m (1 number)
Back Transition
Type	Rectangular
Size(LefxBxH)	15.00 m x 8.00 m x 6.0 m
Particle Size to be settled	less than 0.20 mm
Flushing Gate Size	0.7 m x 0.7 m (1 number)
Capacity	684.00 m3 (Volume for 3 minutes Generation)
Penstock
Type	Exposed
Material	Steel
Length	3800.00 m (uniform diameter)
Diameter	1.10 m
Thickness	8 mm to 22 mm
Powerhouse
Type of Powerhouse	Surface
Size (LxBxH)	30.00 m x 15.00 m x 15.00 m (Roof ridge)
Floor level	947.40 m
Minimum Tail water level	949.5 m
Turbine axis	953.0 m
Turbine
Type of Turbine	Pelton, Horizontal
No. of Units	2
Rated Net Head	217-239m
Unit Discharge	1.36 cum/sec
Axis	Horizontal
Rated Speed	600 rpm.
Runaway Speed	900 rpm.
Generator
Type of Generator	Synchronous AC 3 phase
Max Rated Capacity	3000 KVA
Rated Voltage	6.6 KV
Power Factor	0.85
No of pole	10
No of unit	2
Frequency	50Hz
Excitation System	Brushless
Efficiency	96%
Sub-station
Type	Outdoor
Power Transformers	6.6/33 kV, 3 phase
Type	Oil immersed self-cooled outdoor type (ONAN)
Rated Capacity	3700 kVA
Number of Units	2
Frequency	50 Hz
Number of Phase	3 phase
Voltage Ratio	6.6/33kvs
Transmission Line	About 5 km long 33 kV single circuit ACSR Dog Conductor, connected to Upper Puwa I Sub Station ACSR Dog Conductor, connected to Upper Puwa I Substation
Energy
Installed Capacity	4,960 KW
Annual Wet Energy	19.57 GWh
Annual Dry Energy	8.41 GWh
Total Annual Energy	27.98 GWh

Financial Indicators:

Total Project Cost (Including IDC)	90 Crore
Project Financing (Debt/Equity Ratio)	2:1
Debt Interest Rate	10%
Internal Rate of Return (IRR)	14.07%
Benefit/Cost Ratio (B/C Ratio)	1.16
Project Payback Period	12 years