The feasibility study was prepared for 14 sites, as individual locations. The explored area is overlapping alluvial meadow deposits of Somesul Mic River. The base layer consists of Miocene, grey, over-consolidated clays, with tuffs intercalations. The lithologic stratification is heterogeneous both on vertical, and on horizontal. This is due to the evolution of Somesul Mic River in time (twists and turns, dead distributaries, flooding). The ideal lithologic succession consists of: top soil/backfill, meadow flood deposits and dead distributaries (silty clays with fine sands and organic materials), channel deposits (sand with gravel/gravel with sand), and base layer (grey marl clays, over-consolidated). The following works have been performed so as to draft the Feasibility Study:
- 128 geotechnical boreholes advanced down to 6 or 3 m in depth;
- 82 heavy dynamic penetrations;
- the geotechnical investigations have been developed within 21 days, with the help of two teams;
- Laboratory tests: physical properties.
Data assessment has been completed with 14 Feasibility Studies, for each site. The problematic areas have been identified (low consistencies, high grades of humus) and the 3D model has been drafted for a better understanding of the lithology. The Feasibility Study has been completed with additional exploration works for the technical design, which have been conducted in January 2015