Xekaman-Xanxay (Sekaman-Sanxay) Dam Hydropower Info - by Hobo Maps - Go to Hydropower Projects Page - - - Home

The Xekaman-Xanxay (Sanxay) hydropower project is located on the Xekaman (river) about 40 km from the border with Vietnam in southeastern Lao PDR. The project is about 5 km downriver from the larger and related Xekaman 1 hydropower project.

The project generates 32 MW while acting as a downstream regulator for water discharged from Xekaman 1 HPP. The 5 km of river between the two projects likely has dramatic fluctuations in flow that match the discharged flows from Xekaman 1 which may operate as a peak power facility.

See our Xekaman 1 web page .

Xekaman-Xanxay Dam images below:

The Xekaman-Xanxay project is a part of the 290 MW Xekaman 1 hydropower project acting as a downstream regulator to avoid flooding and to stabilize downstream water flows.

Xekaman 1 and Xekaman-Xanxay were both investments of Viet-Lao Power Joint Stock Company. Main contractor for the project was Vietnam-based Song Da Corporation.

Funding for the project may have been provided by the Vietnam government’s “Development Assistance Fund” and by Vietnamese commercial banks.

The Xekaman-Xanxay plant has an installed capacity of 32 MW and average annual output capacity of 130 GWh.

The project operates under a 25 year concession agreement with the government of Lao PDR.

Unit 1 of Xekaman-Xanxay hydropower plant has been operating since January 2018 while Unit 2 came online in June 2018.

The project is on the Xekaman river in Sanxay district, Attapeu province of Lao PDR.

XeKaman-Sanxay hydropower site coordinates are 14°53'18.3"N 107°06'58.4"E (14.888412, 107.116232)

Xekaman 1 and XeKaman-Sanxay hydropower plant locations shown in satellite images below:

Andritz Hydro provided complete electro-mechanical equipment for the project.

The Xekaman-Xanxay project catchment area is 3,740 square kilometers. The reservoir full supply level surface is 123 meters above mean sea level with low supply level at 122 meters above mean sea level. Active storage volume is 7.1 million cubic meters.

Xekaman-Xanxay and Xekaman 1 power plants are located within 2 km of each other and operate together. Xekaman 1 was completed in 2016 and Xekaman-Xanxay in 2018. Power from both is exported along a 220 kV transmission line with a 70 km section from Xekaman 1 Hydropower Plant to the Vietnam border (invested by Viet-Lao Power Joint Stock Company) and a 119 km section from Bo Y border gate in Kon Tum Province, Vietnam to Pleiku 2 substation (invested by EVN).

XeKaman-Sanxay Dam site and powerhouse images below:

Xekaman-Sanxay powerhouse image below:

XeKaman-Sanxay switchyard image below:

XeKaman-Sanxay powerhouse images below:

Power Transmission from Both Plants

Xekaman 1 and Xekaman-Xanxay power plants are located within 2 km of each other and operate together. Xekaman 1 was completed in 2016 and Xekaman-Xanxay in 2018. Power from both is exported along a 220 kV transmission line with a 70 km section from Xekaman 1 Hydropower Plant to the Vietnam border (invested by Viet-Lao Power Joint Stock Company) and a 119 km section from Bo Y border gate in Kon Tum Province, Vietnam to Pleiku 2 substation in Vietnam (invested by EVN).

Xekaman 1 hydropower project has designed capacity of 290 MW consisting of two turbine units of 145 MW each. Xekaman-Sanxay hydropower plant has designed capacity of 32 MW with two turbine units 16 MW each. Together they have combined capacity of 322 MW and an average annual output potential of 1,220 GWh. 20% of the 322 MW combined output is planned to be used for Lao domestic consumption and 80% exported to Vietnam through a 220 kV transmission line connecting Ban Sok in Lao PDR to Pleiku Gia Lai in Vietnam.

 The Power Purchase Agreement with Electricite Du Laos (EDL) was signed on October 28, 2010 and the purchase agreement with EVN was signed on either March 2, 2011 or Nov. 6, 2012 (conflicting info).

XeKaman 1 & Xekaman-Xanxay export power to Vietnam as seen in images below:

Xekaman 1 and XeKaman-Sanxay hydropower plant locations shown at right side of map below:

Note: The Lao words "Xe" and "Nam" both mean "river" and a term such as "Nam Xe Kaman" is not normally used.