The Dakchaliou I HPP  is expected to locate on Nam PaGnou river  and its tributary stream in the vicinity of Dakchung District, Sekong province. Dam site will be constructed at location where is about 20 Km from Dakchung District and 10 Km  far from Vietnam - Lao border into the west, 120 Km from Sekong Province into the northeastin the route. The project is expected to construct at site betweenSekaman3 Damsite  and power house . It is geographical coordinates are within: 15°22'50.41"to15°24'3.79"Northern latitude and107°24'46.26" to 107°24 '47.91" longitude The catchment area of Dakchaliou I   at dam site is 170 Km2.Normal water level is 535 m and Dead water level  is 534m. Area of reservoir surface confirming to NWL is 0.03  Km2.

The headworks of houay Kapheu  HHP  is  located in Houay Kapheu  river,being a 1rst branch river of Sedon river,belonging to Xiengmai village,Lao Ngam district of Saravane province . Dam site is proposed to construct about 20 Km from Pakxongto south, 45 Km from Pakse to south west,about 14 Km from Laongam to north, 60Km from Sekong to north east .It is geographical coordinates are within:15°21'18" Northern latitude and 106°9'42" longitude