The paper presents the determination of the maximum load of load-bearing structures with terrain contact according to EN 1997-1 (Geotechnical design) and EN 1998-5 (Foundations, supporting structures and geotechnical issues). Processed is a concrete example of SPP Crna rijeka which will be based in rock material, and which does not require “additional“ interventions for the stability of structures (water intake with sedimentation tank and engine room).

Within the project task for the road M-17,3 Buna-Neum, section Neum-Stolac, several variants have been considered and the section has been divided into several sub-sections. The sub-section Stari Neum- Kisevo in the length of cca 3 km has already been built, as well as the sub-section of Kisevo-Brocanac, with length cca 8,5 km. Within the sub-section Brocanac-Drenovac, which construction is in progress, two main variants of the route have been set aside, namely the blue and the red one. The blue route starts from east of the Brocanac village, on mileage km 11+300 if counting from the beginning of the road in Stari Neum, and it follows the corridor of the existing road between Brocanac and Drenovac. The red variant, as well as the previous one, starts from east of the Brocanac village, passes south of the Hutovo village, near the Glumin village, and approaches to the blue variant in the region of Trnovski brijeg. After that, it goes again towards south and over the Burmazi plateau it approaches to Drenovac, while at Varda it approaches to the blue variant and the existing route on north. For adopted blue variant there have been analyzed geomorphologic characteristics, geological structure, and hydrogeological and engineering geological, as well as seismic characteristics of the terrain. Reconnaissance of the terrain has also been done, and all previous documentation has been used as well as results of the former conducted geological investigations. As a basic point there have been used the Main Geologic Maps, papers Ston and Metkovici 1:100 000 with legends.

The Bosnia River is the longest river in Bosnia and Herzegovina. It rises beneath the Igman Mountain, close to Ilidža, locality of Vrelo Bosne. The river flows through the central part of Bosnia and after 270 km of the course, near Bosanski Samac, it empties into the Sava River. The Bosnia River basin is morphological heterogeneous, which is in connection with the geological structure of the terrain. In the source part of the Bosnia River there is the huge Sarajevo-Zenica valley with Dinaric stretching direction. Morphological, it consists of a number of smaller or larger fields, so that in its upper reaches, the Bosnia River runs through the Sarajevo, Visoko, Kakanj and Zenica fields. In the middle reaches, the river breaks through the gorges cut into the firm rocks, Vranduk-Nemila and Maglaj-Doboj, while in the lower reaches, from Doboj to the mouth, it flows by the unstable riverbed through the alluvial plain where it makes number of branches, islands and curves. This paper gives the analysis on geomorphologic and hydrographic characteristics, then geological-tectonic, hydrogeological and engineering-geological characteristics of the Bosnia River basin in its upper reaches. During the work, there have been used methods of analysis and synthesis, cartography and terrain-research method as well as statistic and comparative method. During the research, the following documentation have been used such are sheets OGK (The Main Geological Maps, scale 1:100 000) of Sarajevo, Zenica,Vares, Bugojno and Prozor, HG (Hydrogeological map, scale 1:100 000) of Yugoslavia, and attached legends for these papers as well as literature data.