Nam Theun 1 is a 650MW hydro power project. It is located on Nam Kading river/basin in Bolikhamxai, Laos. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the project is currently active. It has been developed in a single phase. Post completion of construction, the project got commissioned in 2022. Buy the profile here.


The project was developed by Nam Theun 1 Power. Phonesack Group, Electricity Generating Public and EDL-Generation Public are currently owning the project having ownership stake of 60%, 25% and 15% respectively.

Nam Theun 1 is a reservoir based project. The hydro reservoir capacity is 3.009 million cubic meter. The gross head and net head of the project are 148.2m and 140m respectively. The total number of penstocks, pipes or long channels that carry water down from the hydroelectric reservoir to the turbines inside the actual power station, are 2 in number. The penstock length is 100m. The penstock diameter is 7m. The project cost is $1,335m.

Development status

The project got commissioned in 2022.

Power purchase agreement

Electricite du Laos and Electricity Generating Authority of Thailand are the power offtakers from the project.

Contractors involved

ATB Riva Calzoni was selected to render engineering procurement construction services for the hydro power project.

Andritz Hydro was selected as the turbine supplier for the hydro power project. The company provided 1 unit of francis turbine with 130MW nameplate capacity.

Andritz Hydro was selected as the turbine supplier for the hydro power project. The company provided 2 units of francis turbines, each with 260MW nameplate capacity.

Andritz Hydro supplied 1 electric generator for the project.

For more details on Nam Theun 1, buy the profile here.


GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Power Intelligence Center, which provides detailed profiles of over 170,000 active, planned and under construction power plants worldwide from announcement through to operation across all technologies and countries worldwide.