XE PIAN-XE NAMNOY HYDROELECTRIC POWER PROJECT


Technical Description
. Dam and Intake Structure


Dam Type
Max. Height(m)
Length(m)
Catchment’s Area (Km2)
Reservoir Capacity(mil.m3)
Reservoir Area (Km2)
Max. Height(m)
Xe Namnoy
Rockfill
75.5
1.430
522
1092
50
25.0
Xe Pian
Rockfill
47.0
1.250
217
24
3
10.9
Houay Machan(Intake Structure)
Concrete Structure
8.5
-
81
-
-
4.3

Headrace and Powerhouse
Headrace Tunnel (a) Total Length: 16.1 km (b) Max Gross Head: 691m
Upper Tunnel
L = 13.6 km, D = 5.2 m
Vertical Shaft
L = 0.5 km, D = 4.6 m
Lower Tunnel
L = 1.7 km, D = 3.6 ~ 4.6 m
powerhouse
Turbine
3 x Francis Type
3 x Francis Type
(3 x 130 MW) + 2.5 MW = 392.5 MW