Acta Scientiarum Polonorum

The aim of the study is to assess the impact of the site investigation on the foundation design. The basis
for the research was the archive documentation (primary and secondary), between which researchers found
significant discrepancies. The foundation design of the analysed structure was based on improperly prepared
primary documentation which did not take into account the presence of organic soils within the subsoil. To
determine the significance of ground investigation, the verification of limit states for analyzed structure was
performed for data obtained from both documentations. The most significant findings are the computed dimensions
of footings, subsidence, horizontal and vertical bearing capacity. The most significant differences
are visible for computed settlements, which results from taking into account high compressibility of the
organic soil.