PHUKOT KARNALI PEAKING RoR HYDROELECTRIC PROJECT (426 MW)

Commencement

October 10,2017

Completion

November 29, 2019

Duration

about 26 months

Generals

The Employer

Vidhyut Utpadan Company Limited (VUCL)

The Consultant

NEA Engineering Company Limited

Project Location

Karnali Province, Kalikot District, Nepal

29⁰19’03” N to 29⁰09’32” N latitude

81⁰45’00” E to 81⁰35’28” E longitude

 Proposed Intake site:

Proposed Power House site:

Approximately 35km upstream of the headworks area of Upper Karnali Hydroelectric Project (900 MW)

Approximately 7 KM Upstream of the Karnali River and Tila River confluence.

Accessibility

: Nearest all weather road is lies in Humla-Karnali Highway Near Manma      Bazar, District Headquarter of kalika District

: Approximately 160 km north of Birendranagar Bazar(Surkhet Airport) in Surkhet District

Technical

Project Type

Peaking Run of River (PROR)

Hydrology and Sediment Study

Karnali River

Stream flow gauging station

Lalighat Gauging Station installed by DHM in the downstream of Proposed Dam site

Catchment Area

16,902 Km² (Approx.)

Design Discharge

: 348 m³/s

Reservoir

Gross storage volume   

79.78 Mm³

Live storage       

40.13 Mm³

Length of reservoir

 14 km

Dry season Full supply level

910 masl

MDDL   

906 masl

DAM

Type

Roller Compacted Concrete(RCC)

Height

107 m from river bed level

Top elevation

913 masl

Spillway

Overflow Spillway

: Ogee and gated

: 5 Nos of gate, 12 m x 20 m (BxH)

: Crest Level at 891 masl

: Flip Bucket Type Energy Dissipation

Sluice Spillway  

: Ogee

: 2 Nos of gate, 8 m x 10 m (BxH)

: Crest Level at 870 masl

: Sky Jump Type Energy Dissipation

Power Intake

Invert level        

: 875 masl

Number and size of intake gate

:  2 Nos, 8 mx 10 m (BxH), Vertical Lift    

Dry season design discharge

: 348m³/s

Wet season design discharge

395 m³/s

Environmental flow

: 7.7 m³/s

Sediment Undersluice  

4 Nos, at Level 867 masl

Water Conveyance System:

Headrace Tunnel

: 2 Nos, 8 m Dia, horse-shoe shape, 6 km length(Approx.)

Surge Tunnel

: 2 Nos, 9.5 m Dia, Circular shape

Pressure Shaft and Tunnel

: 2 Nos, 6.7 m Dia, Circular shape, 459m length(Total)

Powerhouse

Type

: Underground

Number of Generating Units

6

Type of Turbine

: Francis vertical axis

Gross Head

:168.30 m

Rated Net Head               

158.70 m

Turbine Center Line Level

734.70 masl

Normal Tail Water Level               

741.70 masl

Installed Capacity

426 MW

Transmission line

Length

3.5 km(Approx)

Voltage

400 kV