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The Phou Ngoy Dam (also spelled Phou Ngoi or Phoug Noi and formerly called Lat Sua) is still in the planning stage as of year 2024. Many details have not yet been precisely defined.
The project would be located on the Mekong River in Phonthong District of Champasak Province, Lao PDR about 18 km downstream from Pakse.
Concept image below of what Phou Ngoy Dam might look like:
The project is developed by Charoen Energy and Water Asia Corporation of Thailand.
The bulk of the power output is hoped to be sold to Thailand. The dam would have an installed capacity of 728 MW with 3,278 GWh estimated annual output. Studies are underway at the proposed dam site.
Phou Ngoy is a run-of-river project. The net head of the project would be 10.6 meters.
Image below shows location of Phoug Noy (Phou Ngoy) Dam site at coordinates - 14°59'40"N 105°52'54"E (14.994444, 105.881667):
Two South Korean construction companies, Doosan Heavy Industries & Construction and Korea Western Power (KOWEPO) are to build the dam in cooperation with Charoen Energy and Water Asia (CEWA).
The proposed dam structure would be 1,300 meters long and 27 meters high. It would have a small reservoir area of 13 sq km (80% confined within the main channel) and have very little live storage.
The US $2.4 billion dollar project would impact more than 200 hectares of land and 88 villages in seven districts. The most-affected village would be Khon Ken village where 811 residents reside in 142 households.
The developers and Lao government have not yet formally notified the Mekong River Commission about the project to begin the six-month prior consultation process that would include an impact assessment and details of the project. They hope to submit this info soon.
As of August 2024 no power purchase agreement has yet been signed for the proposed output.
Phou Ngoy Dam barrage site image below:
Proposed site of Phou Ngoy Dam shown below:
The project includes the following:
1. Construction of 1,300 meter long dam (the height from foundation to crest will be 27 meters).
2. Construction of 13 square kilometer reservoir
3. Construction of penstock
4. Construction of shaft
5. Construction of substation
6. Construction of power house
7. Installation of generators
8. Installation of turbines
9. Installation of transformers
10. Laying of transmission lines
Phou Ngoy project located at left side of map below:
Design statistics for Phou Ngoy Hydropower Project (also called Lat Sua) in charts below. This info is old and may not be completely accurate as the project is still in a planning stage.
