Location:Lamong Village, Phouvong District, Attapeu Province

$142.53 M

Project Cost

66 MW

Installed Capacity

263 GWh

Average Annual Energy

65 M

Dam Height

4.2 Km2

Reservoir Surface Area

Project Cost $142.53 M
Shareholder CSE 100%
Installed Capacity 66 MW
Average Annual Energy 263.12 GWh
Maximum Turbine Discharge 76.20 m3/s
Rated Head 98.8 m
Turbine Type Vertical Francis x 3 Units
Offtaker EDL
Catchment Area 861 Km2
Annual Average Rain Fall 2,315 mm
Annual Average Discharge 36.6 m3/s
Reservoir Storage Capacity 71.4 Million m3
Reservoir Surface Area 4.2 Km2
Full Supply Level 427 m a.s.l
Minimum Operating Level 420 m a.s.l
Main Dam
Type Gravity Concrete
Height 65 m
Crest Length 280 m
Headrace Channel
Type Exposed Excavation
Length 114 m
Longitudinal Gradient 0,001
Type Steel Liner
Number of Pipe 1
Diameter 4.2 m
Length 370 m
Longitudinal Gradient
Type Sluice Gatc
Number of Gate 4
Design Flood Discharge p=0,1% 3.780 m3/s
Headrace Tunnel
Type Reinforced Concrete
Design Discharge 76.2 m3/s
Diameter 5.4 – 4.2 m
Length 1,430 m
Tailrace Channel
Type Open Channel
Length 205 m
Switchyard 115 kV
Elevation 354.5 m a.s.l
Dimension 55m X 40m
Installed Capacity 66 MW
Number of Unit 3
Turbine Type Vertical Francis
Max Powerhouse Discharge 76.2 m3/s
Erection Floor Elevation 324.5 m a.s.l
115 KV Transmission Line
Substation Sapaothong Substation
Length 68 Km
Circuit Type Single Circuit
Conductor Size 240 mm2