Nam Sor Dam Hydropower info by Hobo Maps - Go to Hydropower Projects Page - - Home

Nam Sor (Nam So) Hydropower Project is located in Viengthong District, Bolikhamxay Province of Lao PDR. The project dam site is on the Nam Sor (Nam So) river which is a tributary of Nam Nagom (river) about 6 km upstream from their confluence at Ban Phadeng.

Nam Sor can also be spelled as "Nam Xor" or "Nam So".

Nam Sor Hydropower Project location is shown in satellite image below:

The project is owned by Nam Sor Hydropower Company with 4 main shareholders: Vieng Chantech Construction Co., Ltd. (20%), Prixay Thailand (38%), CSS (38%) and V-Hydro Holding Company (4%).

The project is developed by Vientiane Techno Co., Ltd. as EPC contractor and was still under construction in year 2023. In year 2026 we aren't sure if the project has been fully completed or if EDL has started offtaking the output.

The project is a run-of-river hydropower station with installed capacity of 4.2 MW (2 x 2.1 MW Horizontal Francis) with annual 19 GWh output capacity to be delivered to EDL for domestic consumption.

Nam Sor HPP layout images below with powerhouse located at coordinates 18°36'17.8"N 104°27'14.4"E (18.604944, 104.454000) and dam structure at 18°36'43.2"N 104°28'06.5"E (18.612008, 104.468459).

Nam Sor HPP description and project layout image below:

Nam Sor & Nam Ngom Hydropower Projects are close together as seen in topographic map below:

Nam Sor Dam is located at coordinates 18°36'43.2"N 104°28'06.5"E (18.612008, 104.468459) below:

The project includes a backfill R.C. Concrete dam, reservoir, fixed weir, sand trap, intake, 1300 meter long headrace canal, headrace tunnel, forebay, 800 meter long penstock, powerhouse, 12 km long high voltage transmission line, spillway and a tailrace.

The project has gross head of 128 meters.

Nam Sor Dam project layout image below:

Nam Sor HPP catchment area outlined below:

Nam Sor Dam reservoir image below:

Nam Sor Dam penstock images below:

Nam Sor Powerhouse is located at coordinates 18°36'17.8"N 104°27'14.4"E (18.604944, 104.454000) below:

Nam Sor Dam power plant image below:

Nam Sor Dam power plant images below:

Nam Sor Dam powerhouse control panel image below:

Nam Sor switchyard image below:

Nam Sor construction images below:

Info below copied in 2024 from Lao Blogger website at - https://lao-hydropower.blogspot.com/2021/06/namsor-power-plant.html .

The project was developed by Vientiane Techno Co., Ltd. as EPC contractor.

The Nam Sor Hydropower project may have qualified as a Clean Development Mechanism (CDM) project under the Kyoto Protocol allowing it to receive carbon emission reduction credits. The reduction in carbon dioxide emissions is estimated to be 10,630 tons per year. View or download the CDM application document HERE . This CDM application was filed a few years before completion of the project and we aren't sure if it actually came into effect as the Kyoto Protocol system benefits may have expired in the interim.