The decision of three interconnected questions is considered: procedure of shooting of an open-cast mine by a pilotless flying machine; a technique of drawing up of the topographical plan and calculations of volumes of excavations in system CREDO TOPOPLAN 1.0 and a technique of an estimation of accuracy of volumes of a ground with the account of correlation dependence between casual errors of volumes in the next squares. Affirms, that experience of shooting of the broken earths and calculations of volumes can be used not only for the agricultural purposes, but also for creation of reservoirs on the basis of open-cast mines for suppression of fires, rest of citizens, playing sports and other purposes.