NAM NGIEP 3A

 Location:Nasy Village, Khoun District,  Xiengkhuang Province

$102 M

Project Cost

44 MW

Installed Capacity

144 GWh

Average Annual Energy

30 M

Dam Height

1.8 Km2

Reservoir Surface Area

Project Cost $102 M
Shareholder CSE 100%
Installed Capacity 44 MW
Average Annual Energy 144 GWh
Design 36.70 m3/s
Rated Head 153 m
Turbine Type

– Vertical Francis 3 Units

– Horizontal Francis 2 Units

Offtaker EDL
Catchment Area 336 Km2
 Mean Annual precipitation 14m3/s
Mean Annual runoff 2400 mm
Reservoir Storage volume 13.85 Million m3
Maximum Reservoir Surface Area 1.8 Km2
Full Supply Level 1,050 m a.s.l
Minimum Operating Level 1,048 m a.s.l
Main Dam
Type Earth till Dam
Height 30 m
Crest Length 110 m
Headrace Channel
Type Open Channel & Box culvert
operation Chanel 1,100 m
Longitudinal Gradient 500 m
Penstock
Type Steel pipe
Number of cell 1
Diameter 3.00 m
Length 450
Longitudinal Gradient
Spillway
Type Steel Sluice Gate
Number of Gate 2
Maximum  Discharge 450 m3/s
Headrace Tunnel(none)
Type  –
Design Discharge  –
Diameter  –
Length  –
Tailrace Channel (none)
Type  –
Length  –
Switchyard 115kV
Elevation 904.60 m a.s.l
Dimension 45m x 54m
Powerhouse
Installed Capacity 44 MW
Number of Units 5
Turbine Type Vertical Francis 3 & horizontal Francis 2
Max Discharge 34 m3/s
Erection Floor Elevation 901.60 m a.s.l
115KV Transmission Line
Substation NAHO
Length 3 Km
Number of circuit 1
Conductor Size 240 mm2