A man in overalls and cap stands at the controls of a coal- dumping device at the McGregor Mine in Milner, Colorado; the cylindrical device is housed inside a structure with exposed wooden rafters and supports.
View of a coal dumping device at the McGregor Mine in Milner, Colorado; the device is housed in a warehouse-type two-story structure with exposed rafters and supports; an open cylindrical metal device with rails on top level dumps coal to lower...