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Purpose. The solution to the problem of the formation of internal dumps in the development of iron ore deposits and the formation of the bench of deep pits with steep dipping layers. The research methodology consists in establishing the costs of extracting, moving waste rocks from the face to the internal or external dumps with their subsequent storage during the development of steep dipping layers according to the proposed technological scheme. At working out steep dipping layers, a decrease in the distances of transportation of waste rocks from the lower horizons is achieved due to the correct placement of transport communications and the formation of internal dumps. Allocation the phases of development at the deposit allows to form the pit of a first-stage with subsequent advancement of the mining front using steep dipping layers and the formation of an internal dump. Findings. Calculations of cost were executed taking into account the proposed technological scheme of the development of steep dipping layers. The obtained calculations of the cost of preparation, extraction, transportation and placement of waste rocks in external or internal dumps made consider possible cargo flows from faces to storage. At the same time, it was taking into account the costs of

The solution to the problem of the placement of internal dumps in the development for forming the deep pit edges by steep dipping layers