Nam Kong 2 Hydropower Info - by Hobo Maps - Go to Hydropower Projects Page - - - HOME
The Nam Kong 2 hydropower plant site is located near Lamong village, Phouvong district in Attapeu province, Lao PDR about 40 km south of Attapeu town.
The Nam Kong (river) begins about 72 kilometres upstream from the dam and has a water catchment area of about 861 square kilometers.
Nam Kong 2 Dam images below:
A memorandum of understanding for development of the Nam Kong 2 hydropower project was signed in 2010 between the government of Lao PDR and Hoang Anh Gai Lai Mineral Joint Stock Company of Vietnam.
On Dec 2, 2018 Laos and Vietnam entered into an Agreement on the Cooperation and Investment (MOU) for the Nam Kong 2, Nam Kong 3, Nam Y Mun and Na An hydropower projects between Chaleun Sekong Company and Song Da 5 Joint Stock Company.
Caution: Info on the web that was put up while the Vietnamese company was planning the Nam Kong 2 project around year 2010 is no longer relevant and may be misleading. Best to use info put up after Chaleun Sekong Energy took over around 2017 or a bit earlier.
There seemed to be problems with progress by the Vietnamese developer and in December 2019 Lao-based Chaleun Sekong Energy Co. Ltd. (CS Energy) fully bought up the Nam Kong 2 project. CS Energy became the full owner and took over the project construction.
The project has an installed capacity of 66 MW (3 units of Francis turbines, each with 22 MW nameplate capacity) and generating capacity of 263 GWh per year.
All three Nam Kong Hydropower project site locations are shown in the satellite image below.
Nam Kong 2 powerhouse is at coordinates - 14°29'52.6"N 106°49'15.5"E (14.497944, 106.820972) .
Nam Kong 2 and 3 Hydropower project site locations shown in old satellite image below.
Nam Kong 2 project site image below:
Nam Kong 2 image below shows the intake structure before full impoundment that sends water to the powerhouse by a tunnel that passes under the red-roof buildings in the image.
The concrete gravity dam is 50 meters high, 210 meters long and 8 meters wide. The reservoir surface covers an area of 4.2 square km.
The project has 98 meters head and a 370 meter penstock with 4.2 meter diameter.
In 2016, CS Energy acquired ownership of the uncompleted project from the former owner Hoang Anh Atteapue Electric Company. CS Energy took over as main contractor for the project as well.
The project was supported by technical design consultant companies ILF Consulting Co. Ltd. (Austria), Right Tunneling Co, Ltd. (Thailand), Whessoe (Malaysia) and Pöyry (Finland) who surveyed, designed, procured materials and equipment, monitored the construction progress and tested the construction to international standards.
CS Energy appointed Whessoe/KGAL to design, fabricate and install the steel lining for the two bottom outlet diversion tunnels in the Main Dam. The scope of work included the refurbishment of the outlet gates, the design and installation of guides to provide isolation at higher water levels and the design, manufacture and installation of steel linings to the existing diversion tunnels.
Nam Kong 2 Dam hydropower facility image below near the intake structure:
The Nam Kong 2 hydropower project was completed in 2018 and began selling the power generated to Electricite du Lao (EDL) for Lao domestic consumption. In early 2020, CS Energy entered into a Power Purchase Agreement with Electricity of Vietnam (EVN) for sale and export of output to Vietnam. Not sure if or when the sale of output to EDL will be reduced or terminated. The changeover may have to wait for a new transmission line to Vietnam to be completed.
CS Energy is also the owner of Nam Kong 3 hydropower plant and both projects are located in the same area. They apparently will use the new transmission line for export of output from both plants to Vietnam.
Nam Kong 2 hydropower project cost US$ 142.5 million to build.
Nam Kong 2 powerhouse images below:
Nam Kong 2 controls below:
Nam Kong 2 powerhouse below:
Nam Kong 2 reservoir images below:
Nam Kong 2 intake area image below:
Nam Kong 2 intake structure image below:
Nam Kong 2 dam below:
Nam Kong 2 switchyard below:
Normal reservoir operating surface level elevation is estimated at 421 meters above sea level.
Location of Nam Kong 2 Dam is at lower right area of map below:
Nam Kong 2 project history below from CS Energy website Nov. 2021:
Power Transmission: The project connecting Nam Kong 1, 2, 3 Hydropower Plant Cluster (Laos) to the Vietnamese power system was constructed in Ngoc Hoi district, Kon Tum province, Vietnam. The project was expected to be completed and energized in the fourth quarter of 2022. The switching substation includes ten 220 kV bays, five feeder bays and one linking switching bay. The project on the Vietnamese side is invested by Vietnam Electricity.
Maps below show 220 kV route for export of power to Vietnam.
