B. P. Voropaev, Head of Design Department, e-mail: admin@novotek15.belgorod.ru; G. N. Genzel, Deputy Director for Research and Project Work, Candidate of Geological and Mineralogical Sciences, e-mail: admin@novotek15.belgorod.ru; E. S. Gladchenko, Chief Project Engineer, Candidate of Engineering Sciences, e-mail: admin@novotek15.belgorod.ru; L. A. Elantseva, Head of Research Department, Candidate of Geological and Mineralogical Sciences, e-mail: admin@novotek15.belgorod.ru, “NOVOTEK Scientidic and Research Center” Ltd.; A. I. Peshkov, Chief Hydrogeologist, e-mail: Peshkov_AI@sgok.ru, "Stoilenskiy Mining and Concentrating Plant" Company.

Exploration of Stoilenskiy quarry has been connected with necessity of organization ramified dehydrating system. It includes underground drainage complex and inside-quarry drainage workings. The structure of dehydrating system, equipment, volume of drained water, principles of its usage have been presented. The prospects of dehydrating system development, taken into account quarry widening, have been shown.