Salient Features

1. PROJECT LOCATION

Province

:

District

:

Myagdi

Intake Site

:

Jhi, Raghuganga Rural Municipality - 05

Powerhouse Site

:

Tilkanya, Rahuganga Rural Municipality - 03

Geographical Co-ordinates

Latitude

:

28°22’21”N  to 28°25’45”N

Longitude

:

83°31’13”E  to 83°34’35”E

GENERAL

Name of River

:

Raghuganga

Nearest Town

:

Beni

Type of Scheme

:

Peaking run-of-river scheme

Gross Head (m)

:

292.83 

Net rated Head (m)

:

281.56 

Installed Capacity (MW)

:

2x20 = 40

Average Annual Energy after Outage

:

238.59 GWh (Peak Energy = 27.95 GWh, Non Peak Energy =50.26 GWh  and Wet Energy = 160.37 GWh)

DRAINAGE AREA

Total Area

:

305.0 km²

Effective area below 5000 m  

:

287.0 km²

90% firm flow in the driest month 

:

6.13 m³/s

Design flow 

:

16.67 m³/s

Diversion During Construction

Type of Structure 

:

Diversion Channel

Design flow (dry season 1:10 years)

:

27.0 m³/s

RESERVOIR

Full supply Level

:

1,165.0 m

Minimum operating Level

:

1,160.0 m

Maximum flood Level

:

1,166.10 m

BARRAGE AND UNDERSLUICE

Type of Structure

:

Gated

Deck level

:

1,169.0 m

Spillway Crest Elevation 

:

1,157.0 m

Crest Level of Undersluice

:

1,152.0 m

Maximum height above foundation

:

     25.5 m

Crest Length

:

     21.0 m

Capacity (1 in 1000 Yr Flood)

:

   688.0 m³/s

DESANDER

Number of Bays

:

2.0

Nominal size of trapped particle (mm)

:

>0.20

Length X Width X Depth per bay (m)

:

80.0 X 8.0 X 5.94

HEADRACE TUNNEL

Concrete Lined Length (m)

:

6,270.106

Internal diameter (Concrete lined) (m)

:

3.30

Shape

:

Horse shoe

Excavated shape

:

D Shape

Lining thickness (mm)

:

300.0/350.0

SURGE SHAFT

Diameter (Circular) (m)

:

10.0

Height (m)

:

53.15

Maximum Up Surge Level (m)

:

1,178.42

Minimum Down Surge Level (m)

:

1,142.33

BUTTERFLY VALVE CHAMBER

Finished Dimenssions

:

10m (L) X 10m (H) X 6m (W)

STEEL- LINED PRESSURE SHAFT

Diameter

:

2.15 m

Length (m)

:

53.15

Maximum shell thickness (mm)

:

 Varies from 10 to 25

Penstock- Diameter (m) (after bifurcation)

:

1.52

Length (m)

:

20.0 each

POWER HOUSE

Length X Width (m)

:

57 X 24

Centreline of Distributor pipe (m)

:

870.5

Turbine Type,Orientation and Unit

:

Pelton , Verical Axis and 2 Nos

Rated flow for a unit (m³/s)

:

8.34

Turbine Rated Capacity (MW)

:

20.51

Generator Rated Capacity(MVA)

:

23.53

Gross Head (m)

:

292.83

Rated net Head (m)

:

281.56

Rated Turbine Efficiency

:

90.50 %

Rated Generator Effeciency

:

97.50 %

Installed Capacity (MW)

:

2 X 20 = 40

TRANSMISSION LINE (132 KV)

LILO of 220 kv Transmission line from Dana to Kushma at PH gantry 

:

 600 m

ACCESS ROAD

New Permanent road (from Powerhouse to Headworks)

:

10.87 km

Branch to Adits

:

0.8 km

Economic Indicators wothout Transmission Line

Project Cost

:

 NRs. 859.89 crore.

Total Annual Energy

:

247.89 GWh

Firm Energy (90 % Hydrological Firm)

:

137.71 GWh

Secondary Energy

:

110.18 GWh

Benefit / Cost at 10 % discount rate

:

1.09