This model was part of a large project to complete SNP Square at Bratislava Center. The aim was to assess the influence of underground objects (e.g., garages, tunnels) on the groundwater level. The main goal of this model was to document how the groundwater flow would change after four construction stages that were defined by the project. The situation required a 3D model due to the complexity of the construction and the hydrogeologic situation. This numerical model of the steady groundwater flow used the BEM.