Location:Ban Bengphoukham, Samakhixay District, Attapeu  Province 

$36.86 M

Project Cost

14.8 MW

Installed Capacity

80 GWh

Average Annual Energy

7 M

Dam Height

6.0 Ha

Reservoir Surface Area

Project Cost $36.86 Million
Shareholder CSE 100%
Installed Capacity 14.8 MW
Average Annual Energy 80 GWh
Maximum Turbine Discharge 24 m3/s
Rated Head 75 m
Turbine Type Vertical Francis x 2 Units
Offtaker EDL
Catchment Area 1,284 Km2
Annual Average Rain Fall 2,600 mm
Annual Average Discharge 53 m3/s
Reservoir Storage Capacity 0.21 Million m3
Reservoir Surface Area 6.0 Ha
Full Supply Level 252 m a.s.l
Minimum Operating Level 249 m a.s.l
Main Dam
Type Concrete Gravity
Height 7 m
Crest Length 100 m
Crest level 252 m a.s.l
Headrace Channel
Type Open Channel
Length 1,832 m
Longitudinal Gradient 0.16
Type Steel liner
Number of Pipe 2
Diameter 1.6 m
Length 281 m
Longitudinal Gradient 7.7%
Type Ogee Gated
Number of Gate 5
Design Flood Discharge  
Max Inflow peak 1970 m3/s
Headrace Tunnel
Type Concrete Liner
Design Discharge
Diameter 4.3m x 5.3m Horseshoe Shape
Length 1,938 m
Tailrace Channel
Type Concrete
Length 11.5 m
Switchyard 115kV
Elevation 175.80 m a.s.l
Dimension 24m x 52m
Installed Capacity 14.8 MW
Number of Unit 2
Turbine Type Francis Vertical
Max Powerhouse Discharge 24 m3/s
Erection Floor Elevation 175.3 m a.s.l
115KV Transmission Line
Substation Nongbong Substation
Length 32 Km
Circuit Type Single
Conductor Size 185 mm2