Granite Construction recently came to Rock Systems with a request to provide a conveyor system to allow them to move their pit feed hopper closer to the raw material. The conveyor system needed to be easily moved and handle up to 800 tons per hour of sand and gravel. Rock Systems furnished 36” wide x 100’ long pit portable field conveyors. The conveyors were outfitted with 40 h.p. electric motor drives, 42” deep truss conveyor frames, CEMA “C” troughing and return idlers, adjustable height undercarriages with high flotation tires, field tow hitches, discharge hoods with belt scrapers, and electric motor control panels with power distribution blocks.