Nam Theun 1
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Nam Theun 1 under construction
Particulars
Owner: Nam Theun 1 Power Company
Designer: AFRY Switzerland Ltd. (formerly Pöyry Energy Ltd.)
Contractor: Initially CMC Ravenna, Italian Thai Development and Song Da Corporation J.V.; replaced by SinoHydro (Construction Bureau Nº3)
Statistics
Type: Gravity
Purpose(s): Hydropower
Reservoir capacity: 3009 m3x106
Height: 187 metres
Length: 772 metres
Volume of RCC: 4141213 m3x103
Total volume: 4320 m3x103
Construction Dates
Start of Project: 08/15 (August 2015)
Start of RCC: 01/19 (January 2019)
End of RCC: 01/22 (January 2022)
End of Project: 08/22 (August 2022)
Country: Laos
River: Nam Kading, aka Nam Theun
DMS Co-ordinates: 18˚21'17.77"N, 104˚8'51.59"E
DD Co-ordinates: 18.355, 104.147667
Facings
Upstream
| Slope | Type |
|---|---|
Downstream
| Slope | Type |
|---|---|
| RCC against formwork (GEVR/GE-RCC) [stepped face] |
Spillway
| Slope | Type |
|---|---|
Placement
| Layers (mm) | Lifts (mm) |
|---|---|
| 300 | 3000 & |
| 9000 |
Cementitious material
| Cement (kg/m3) |
|---|
| 100 |
| 130 |
| Pozzolan (kg/m3) | Pozzolan Type |
|---|---|
| 130 | Low-lime flyash (ASTM Class F) |
| 120 |
