The Proletary deposit is located 5 km south-east of the town of Borovichi, Novgorod region. In terms of operating conditions it is one of the most complex in the Borovichi - Lyubytinsky industrial region, which has more than 20 deposits of refractory clays. The deposit is developed by underground mining. The development system is panel-and-pillar with development by drifts. The mine field occupies the south-western part of the watershed between the Belgian and Bystrica rivers. The surface of the site is mostly open, in some places swampy. The relief is quiet, with amplitudes of fluctuations of marks up to 6 m.