Ratchaburi Electricity Generating Holding PCL. In co-operation with B.Grimm Power PCL. And Lao World Engineering & Construction Co., Ltd. As developers of Xekong 4A and 4B Hydroelectric Power Projects.  Assigned TEAM GROUP to conduct the feasibility study and environmental and social impact assessment of the Xekong 4A and 4B Hydroelectric Power Projects. Scope of studies covered geological investigation, topographic survey, and hydrological survey, as well as socio-economic, survey forest and wildlife survey.

 

Xekong 4A and 4B Hydroelectric Power Projects are located on the Xe Kong River, one of the largest tributary of the Mekong River, in Xekong Province of southern Lao PDR.

 

Xekong 4A is a straight gravity roller compacted concrete dam of 75 meter in height. The spillway, consisting of 6 separate bays, is located on the central blocks of the dam. The power intake is located on the right wing while the diversion conduit is at the left base of the dam. Full supply level (FSL) of Xekong 4A is at +200 m.asl. Power generating capacity of the dam is 165 MW.

 

Xekong 4B RCC dam has a straight axis, about 117 m high. The spillway, consisting of 4 separate bays, is arranged to be aligned with the river channel. The power intake is located on the left wing while the diversion conduit is at the right base of the dam. Full supply level (FSL) of Xekong 4B is at +291 m.asl. Power generating capacity of the dam is 175 MW.

 

Of the combined power generating capacity of 1,642.5 GWh annually, about 90% will be exported to Thailand and the rest 10% will be distributed to Lao’s local grid.

 

Project construction is expected to commence in the dry season of 2020 and takes four years to complete.