In my diploma thesis, I am going to present the creation of the structural 3D model of the Čatežko polje and Dobovsko polje. The data has been collected for the purpose of constructing the hydroelectric power plant Mokrice. I used the program Strater for drawing the boreholes of this area that were made during my research. Then I used the program Surfer in order to show the 3D model of this specific area. The purpose of my thesis was the creation of the 3D model which would enable an insight into the object of the gravelly sandy aquifer. Besides the creation of the 3D model, my goal was also to present two of the programs from the field of mining industry, geotechnology, geology and geotechnics.