S. No.

Parameters

Details

1

General

Name of the Project

Jilli Chumli Khola Hydropower

Project

Name of the River

Jilli Chumli Khola

Type of Scheme

Peaking Run of River

Project Location

Mahabu Rural Municipality ,Kalikot

District, Karnali Province, Nepal

License Boundary

Easting 87°27’01" E to 87°30’00" E

Northing  27°46’56" N to 27°48’29" N

Nearest settlement

Dillikot/Baluwatar

2

Organization

Developer

Sakshyam Hydropower (P) Ltd,

Nepal

Consultant

Engineering Team of Sakshyam

Hydropower (P) Ltd.

3

Hydrology

Catchment area at intake site

50.6sq. km.

Catchment area at powerhouse

100 sq. km.

Design discharge

8.64 m3/s

Average annual discharge

2.66 m3/s

Minimum monthly discharge

0.76 m3/s

Maximum monthly discharge

7.51 m3/s

Minimum environmental release

0.16 m3/s

Flood discharge for headworks

design (100 years)

177.40 m3/s

Flood discharge for

powerhouse/tailrace design (100 years)

234.06 m3/s

Construction flood discharge for

headworks (20 years)

39.18 m3/s

4

Sediment Study

Average annual sediment load

171747.1 tons

Maximum sediment load

0.657 kg/m3

S. No.

Parameters

Details

Estimated annual sediment yield

0.221 million tons/year

5

Geology

Regional Geology

Higher Himalaya

Major rock types in headworks

Foliated Gneiss and thin part of

Schist

Major rock type in waterways

Gneiss and Augen gneiss, Schist and

Colluvium

Major rock type in powerhouse

Alluvial river terrace deposits, Bed

rock to thickly foliated gneiss

6

DAM

Tpye

CFRD

FSL

2935 masl

Dam crest Length

215.00 m

Lowest Riverbed Level at Weir

Axis

2893.00 masl

Foundation rock type

Foliated Gneiss with thin partings of

Schist

Dam Height

51 m

Reservoir Volume

63 MCM

7

Diversion During Construction

Construction flood (m3/s)

39.18 m3/s

Diversion type

Coffer Dam

Length (m)

500 m

8

Intake

Intake type

Side intake

Number of orifices

3

Size

2.0 m (B) x 1.5 m (H)

Top sill level

2912.00 masl

Invert sill level

29100 masl

Gate type

Fixed wheel vertical lift

Hoisting system

Gantry Crane hoist

Trash rack dimension and opening

2.0 m (W) x 1.5 m (H) x 3 (no’s)

Clear opening of trash rack

50 mm

S. No.

Parameters

Details

Trash rack cleaning mechanism

Trash rack Cleaning Machine

9

Headrace Tunnel

Type

Inverted D-shaped tunnel

Material

Concrete and shotcrete lined

Length

6500 m

Size (W x H)

2.80 m x 2.80 m

Thickness

50mm-200 mm (varies)

Support type

Concrete lining, shotcrete, steel ribs,

rock bolts

10

Adit Tunnel to HRT

Type

Inverted D-shaped tunnel

Material

Concrete and shotcrete lined

Length

500 m

Size (W x H)

2.80 m x 2.80 m

11

Surge Shaft

Type

Restricted Orifice

Diameter

4 m

Diameter of Throttled Orifice

1.0 m

Height

80.0 m

Upsurge level

2955.00 masl

Down surge level

2885 masl

12

Surface Penstock

Type

Surface Steel Pipe

Material

ASTM 537, ST-550, ST-450

Length

671.62 m

Internal diameter

1.2 m

Thickness

8 - 26 mm

13

Pressure Shaft (Horizontal and Vertical)

Type

Steel

Excavation Diameter Vertical

2.4 m

S. No.

Parameters

Details

Excavation Diameter Horizontal

(1:10) Slope

2.8 m

Internal Diameter

1.2 m

Total Length

1517.73m (Horizontal + Vertical shaft)

Vertical Shaft - I

194.35 m

Horizontal Shaft – I

440.60 m

Vertical Shaft - II

202.37 m

Horizontal Shaft – II

373.237 m

Vertical Shaft - III

173.83 m

Horizontal Shaft – III

133.35 m

14

Horizontal Shaft after Crossing

14.1

Up to Bifurcation

Horizontal Shaft IV diameter

2.80 m

Pipe diameter

1.20 m

Length

112.0 m

14.2

After Bifurcation

Bifurcation I

Pipe Diameter

0.85 m

Length

14.21 m

Bifurcation II

Pipe Diameter

0.85 m

Length

20.27 m

15

Adit Tunnel to Pressure Shaft

Type

Inverted D-shaped

Material

Shotcrete and concrete lined

15.3

Adit Tunnel -I

Length

67.88 m

Outlet Sill level

1801.38 masl

Size

2.8m x 2.8m

15.4

Adit Tunnel-II

Length

25.38 m

Size

2.8m x 2.8m

Outlet Sill level

1789.32 masl

16

Powerhouse

Type

Surface

Plan Dimensions (L x B x H)

33.5 m x 15 m x 28 m

S. No.

Parameters

Details

17

Tailrace

Type

RCC canal

Numbers

1

Size (B x H)

3.0 m x 2.3 m

Length

75 m

Outlet water level at river

1779.10 masl

18

Turbine

Type

Pelton, Vertical Axis

Number of Unit

2

Maximum Gross Head

1454 m

Minimum Gross Head

1413 m

Rated Net Head

1368 m

Rated Capacity per Unit

50500 kW

Discharge per Unit

4.32 m3/s

Turbine Axis Elevation

1480 masl

Turbine Efficiency

90.00%

19

Generator

Type of Generators

Salient Pole, Synchronous, three

phases

Number of Unit

2

Rated Output (10% overload)

55 MVA

Generation Voltage

11 kV

Frequency

50 Hz

Power Factor

0.85

Excitation System

Brushless

Speed

750 rpm

Generator Efficiency

96.5%

20

Transformer

Type

Outdoor, oil immersed

Number of Phase

3 Phase

Number of Units

2

S. No.

Parameters

Details

Frequency

50 Hz

Vector Group

YNd11

Transformer Efficiency

99%

21

Transmission Line

Transmission voltage

132 kV

Length

16 km (Phukot S/S)

Connection point

Phukot Substation

22

Power and Energy

Installed Capacity

101 MW

Gross Head (Maximum)

1454 m

Gross Head (Minimum)

1413 m

Outage

5%

Dry Season Energy (with outage)

182 GWh

Wet Season Energy (with outage)

113GWh

Total Annual Energy (with outage)

29 GWh

23

Construction Period

48 Months

24

Project Cost and Financial Indicators

Total Project Cost excluding IDC

NPR 17,342,158,329

Total Project Cost including IDC

NPR 18,344,041,357

IRR on Project

12.49 %

Equity Internal Rate of Return

(EIRR)

17.66 %

NPV (In NRs '000)

3,593,215

B/C Ratio

1.24

Discounted Payback Period

11.90years