Feasibility studies of the big projects playing an important role in the economy of the countries, as it helps in reviewing the strengths, weaknesses, opportunities, and threats that effects those projects. In the water sector, the main focus developing countries nowadays is to start study and develop a long-term plan to develop a strategy for the best utilization of land and water resources. Under this plan, managing water projects was determined to be one of the high priorities. One of the main constraints in starting those projects is the lack of capacity and information to start a feasibility study of these projects, thus data collection from the project sites is needed. The present research paper presents the use of recent technology of data collection and analysis for constructing a multi-purpose dam in the basin of Sue River, South Sudan. Feasibility study for constructing this dam requires huge amount of data and information about the site. Bathymetric and topographic survey, remote sensing (RS), digital elevation model (DEM) and geographic information system (GIS) was integrated in order to collect the required information in a suitable time with accepted accuracy.