To fulfill the scope of the geology investigations of Feasibility Study, Ground Data Probe Co., Ltd. (GDP) Thailand, was contracted for geotechnical investigations such as geological mapping, exploratory borehole drilling, in-situ testing and laboratory testing. GDP mobilized geologists, engineers, technicians, labor and respective equipment to the project site, in accordance with the schedule of work provided in the signed contract between Hydro Hitech Co.,Ltd. and GDP. The results of the investigations are presented on “Geotechnical Investigation report for Keng Seuaten Hydropower Project” and “Geological Mapping Report at Power House, Dam Site and Reservoir for Keng Seuaten Hydropower Project, Lao PDR” as reported by GDP.