NAM EMOUN

 Location:DakChom Village, DakCheung District, Sekong Province

$235 M

Project Cost

129 MW

Installed Capacity

427.4 GWh

Average Annual Energy

25.6 M

Dam Height

0.18 Km2

Reservoir Surface Area

Project Cost $235 Million
Shareholder CSE 100%
Installed Capacity 133 MW
Average Annual Energy 431.8 GWh
Maximum Turbine Discharge 37 m3/s
Rated Head 397 m
Turbine Type Vertical Pleton x 2 Units
Offtaker EDL
Catchment Area Diversion Dam 254 Km2
Main Dam 208 Km2
Annual Average Rain Fall Diversion Dam 2,720 mm
Main Dam 2,670 mm
Annual Average Discharge Diversion Dam 11.4 m3/s
Main Dam 9.3 m3/s
Reservoir Storage Capacity Diversion Dam 0.87 Million m3
Main Dam 0.07 Million m3
Reservoir Surface Area Diversion Dam 0.16 Km2
Main Dam 0.02 Km2
Full Supply Level Diversion Dam 784.1 m a.s.l
Main Dam 782 m a.s.l
Minimum Operating Level Diversion Dam 782 m a.s.l
Main Dam 780 m a.s.l
Diversion Dam
Type Concrete Gravity
Height 29 m
Crest Length 127 m
Crest level 790.2 m a.s.l
Main Dam
Type Concrete Gravity
Height 27.6 m
Crest Length 87.5 m
Crest Level 792.2 m a.s.l

Headrace Channel
Type
Length
Longitudinal Gradient
Headrace Tunnel
Type: Concrete Lining
Design Discharge: 76.2 m3/s
Diameter: 5.4 – 4.2 m
Length: 1,430 m
Penstock
Type Steel Liner
Number of Pipe 1
Diameter 2.8 m
Length 934 m
Longitudinal Gradient
Spillway-Main Dam
Type Gated
Number of Gate 3
Design Flood Discharge
Max. inflow peak
Spillway-Diversion Dam
Type Gated
Number of Gate 3
Conveyance Tunnel
Type Free-Flow
Design Discharge
Diameter 4.5m x 5.5m Horseshoe
Length 13,121 m
Low Pressure Tunnel
Type Pressurized
Design Discharge
Diameter 4.5m x 5m Horseshoe
Length 3,452 m
Tailrace Channel
Type Open Channel
Length
Switchyard 230 kV
Elevation
Dimension
Powerhouse
Type Surface
Installed Capacity 133 MW
Number of Unit 2
Turbine Type Vertical Pelton
Max Powerhouse Discharge 37 m3/s
Erection Floor Elevation
230 KV Transmission Line
Substation Vong Xang (Sekong II)
Length 51 Km
Circuit Type Double Circuit
Conductor Size 240 mm2