ABSTRACT: We are introducing in this paper the utilization of the mathematical modeling of the groundwater flow for developing of the foundation pit dewatering system. The solution for the above problem is discussed through adopting case study at upper Nitra basin through numerical simulation software Visual Modflow Pro. According to the archives and hydrogeological survey we built hydrogeological conceptual model of the studied area followed by development of the numerical model. Dewatering of foundation pit is obtained by the calculation of the optimal number, discharge rate and position of the dewatering wells.