This report presents a demonstration in the use of a surface-based centralized computer control system for the remote monitoring and control of underground conveyors in a U.S. coal mine. The system selected for demonstration was the dynalink micro minos system manufactured by Hawker Siddeley Dynamics Engineering Ltd. The site selected was Barnes & Tucker Lancashire No. 20 Mine located near Carrolltown, Cambria County, Pennsylvania. The system concept and operating and application software was designed and developed by the British National Coal Board. The report describes the selection of the site, specification of the system requirements, and the commissioning, operation, and evaluation of the system under typical U.S. mine operating conditions. Experience with the system, based primarily on the system reliability and performance of conveyor control, was favorable. Mine management personnel felt that the system had successfully achieved its objectives and were taken to expand monitoring and control to other activities.