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Nam Theun 1

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Nam Theun 1 under construction
Nam Theun 1 under construction

Particulars

Owner: Nam Theun 1 Power Company

Designer: Pöyry Energy Ltd.

Contractor: CMC Ravenna, Song Da Corporation J.V.

Statistics

Type: Gravity

Purpose(s): Hydropower

Reservoir capacity: 3009 m3x106

Height: 177 metres

Length: 772 metres

Volume of RCC: 3980 m3x103

Total volume: 4180 m3x103

Construction Dates

Start of Project: 08/15 (August 2015)

Start of RCC: 01/18 (January 2018)

End of RCC: 04/22 (April 2022)

End of Project: 01/23 (January 2023)

Country: Laos

River: Nam Kading, aka Nam Theun

DMS Co-ordinates: 18˚21'18"N, 104˚08'50"E

DD Co-ordinates: 18.355000, 104.147224

Facings

Upstream

SlopeType
  

Downstream

SlopeType
  

Spillway

SlopeType
  

Placement

Layers (mm)Lifts (mm)
3003000

Cementitious material

Cement (kg/m3)
 
Pozzolan (kg/m3)Pozzolan Type
 Low-lime flyash (ASTM Class F)