Districts

: Pyuthan/Arghakhanchi

Catchment Area

: 3414 km2

Installed Capacity

: 218.34 MW

Gross Head

: 164 m

Net Head

: 160.3m

Design Discharge

: 154 m3/s

Full Supply Level (FSL)

: 524 masl

Minimum Operating Level (MOL)

: 473 masl

Reservoir/ Submergence Area

: 18.03 km2

Dam Type

: Concrete Face Rockfill Dam (CFRD)

Dam Height (from the river bed)

: 169 m

Dam Crest Level

: 531 masl

Minimum Drawdown Level

: 473 masl

Concrete Chute Spillway Crest Level

: 493 masl

No. of Spillway bays

: 5 (11 m x 16.5 m gates)

Spillway Design Flood

: 12140 m3/s(PMF flood)

Power Intake Nos

: 2

Intake Tunnel Dia.

: 4.5 m x 2

Pressure Shaft Dia.

: 6.35 m

Pressure Shaft Length

: 592 m

Powerhouse

: Underground Cavern type

Turbine Centre Line

: 356.4 masl

Turbine

: Francis (3 nos.) 300 rpm

Tail Water Level

: 360 masl

Tailrace Tunnel Length

: 1.2 km

Tailrace Tunnel Dimension

: D-shaped 8m x 8m

Average Annual Energy

: 874 GWh (after deduction of outages/losses)

Average Annual Dry Energy

: 305.90 GWh (35 %)

Average Annual Wet Energy

: 568.10 GWh (65 %)

Access Road Length

: 22.94 km from Jhilibang to project area (total)

Transmission Length

: 55 km (220 kV) Up to New-Lamahi Substation

Gross Storage

: 1066.85 MCM

Active Storage

: 694.33 MCM

Dead Storage

: 259.29 MCM

Average River Bed Elevation

: 362 masl

Turbine Efficiency

: 92%

Generator Efficiency

: 98%

Generator Equipment Type

: 3 Phase Synchronous, 85.62 MVA, 11 kV, 300 rpm

Transformer Efficiency

: 99%

Project Cost

: 91,922.937 Million NRs. (including costs from EIA)

Per MW Cost

: 375.05 Million NRs.

District

: Pyuthan/Arghakhanchi

Catchment Area

: 3572 km2

Installed Capacity

: 8 MW

Gross Head

: 7 m

Net Head

: 6.65m

Design Discharge

: 136.20m3/s

Tailrace Water Level:

: 352 masl

Full Supply Level (FSL)

: 359 masl

Minimum Operating Level (MoL)

: 356 masl

Barrage Crest Elevation

: 360.5 m (1.5m freeboard)

Reservoir/ Submergence Area

: 1.22 km2

Power Intake Type

3 Submerged Bellmouth Type Intakes

Intake diameter

: 5.6 m

Spillway Type

: Orifice Type Spillway equipped with Radial Gates

No. of Spillway Bays

: 22 ( 10m x 4m gates)

Spillway Design Discharge

: 7873 m3/s (1000 yrs Return Period Flood)

Energy Dissipator

Hydraulic-jump type Stilling basin

Barrage Height

: 15.5 m

Powerhouse

Semi-Surface Powerstation at Barrage Toe

Penstock diameter

: 4m

Turbine Centre Line

: 345 masl

Turbine

Kaplan (3 nos.) 150 rpm

Tail Water Level

352 masl

Annual Gross Energy

38.90 GWh (after deduction of outages/losses)

Gross Dry Season Energy

14.61GWh (37%)

Gross Wet Season Energy

24.29GWh (63 %)

Access Road Length

22.94 km from Jhilibang to project area (total)

Transmission Length

4.6km (33kV) to Naumure Switchyard

Gross Storage

6.46 MCM

Active Storage

: 3.02 MCM

Average River Bed Elevation

: 345 masl

Site Coordinates

: 82°53"22" E and 27°54"30" N

Irrigation Facilities:

Deukhuri

:10,800 ha with 310.96Mm3 of annual water demand

Banke

:42,766 ha with 959.55Mm3 of annual water demand

Kapilvastu

:29,736 ha with 647.02 Mm3 of annual water demand

Total=

:83,302 ha with total 1917.53 Mm3 of annual water demand

Turbine Efficiency

: 92%

Generator Efficiency

: 98%

Generator Equipment Type

3 Phase Synchronous, 3.14 MVA, 6.6 kV, 150 rpm

Transformer Efficiency

99%

Project Cost

: 5,652.595 Million NRs. (including costs from EIA)

Per MW Cost

655.94 Million NRs. (including cost of Barrage, which is utilized for Surainaka Hydro Scheme as well as

Irrigation Scheme)

District

: Arghakhanchi/Kapilvastu

Catchment Area

: not relevant as water will be conveyed from Lamatal Tailrace

Installed Capacity

. 54.7 MW

Gross Head

: 160 m

Net Head

: 148.66 m

Water Level at Headpond

: 351.5 masl

Tailrace Water Level

: 191.5 masl

Design Discharge

: 41.6 m3/s

Intake Orifice nos:

:4 (Q = 45.76m3/s, including 10% flushing)

Intake Orifice Size:

:4m (W) x 2.75m (H)

Approach Canal after Intake Size:

: 4m (W) x 5m (H), 2 nos

Length of Canal

:28.23 m

Settling Basin effective length:

: 100 m

No. of bays

: 2, 25m width each

Approach Canal after Settling Basin:

: 1 nos.

Approach Canal after Settling Basin size:

: 6m (W) x 5m (H)

Length of Canal

: 259.67 m

Headpond before Tunnel

: 6m (W) x 35m (L)

Tunnel Length

: 18 km

Tunnel Diameter

: 5.5 m (Finished Dia.)

Tunnel Slope

: 1:500

Surge Tank Type

: Orifice type (4.5 m dia. Orifice)

Surge Tank Diameter

:12 m

Penstock Diameter

:3.8 m

Penstock Length

:1172.65m (including bifurcation)

Powerhouse

: Semi-Surface Type, 36.9m (L) x 17m (W) x 30m (H)

Turbine Centre Line -

180.5 masl

Turbine

: Francis (2 nos.) 500 rpm

Tailrace Canal

6m (W) x 2.9m (H), 1: 1000 slope

Average Annual Energy

362.81 GWh (after deduction of outages/losses)

Gross Dry Season Energy

: 173.92 GWh (48 %)

Gross Wet Season Energy

: 188.88 GWh (52 %)

Access Road Length

: 5.17 km from East-West Highway up to Surge tank

Transmission Length

: 22 km (220 kV) to Naumure Switchyard

Irrigation Facilities:

Kapilvastu

:29,736 ha

Turbine Efficiency

:92%

Generator Efficiency

:98%

Generator Equipment Type

: 3 Phase Synchronous, 32.175 MVA, 11 kV, 500 rpm

Transformer Efficiency

: 99%

Project Cost

: 18,141.507 Million NRs. (including costs from EIA)

Per MW Cost

: 327.91 Million NRs.

Administrative Coverage:

: Shivaraj Municipality (1 to 11)

Krishnanagar Municipality( 1 to 12) Bijayanagar VDC (Ward no. 2 to 7) Buddhabhumi (ward no. 7) Maharajgunj (ward no. 1 to 11)

Cultural Command Area (CCA):

: 29,736 ha (20,243 ha on eastern side & 9,493 ha on

western side)