a conveyor a feeder and at least one bridge breaker that are mounted to the structural frame member as the agitator travels through the bay the feeder takes composting material from the bay and feeds it to the conveyor which discharges the composting material rearwardly into the bay behind the agitator the bridge breaker displaces the composting material above the feeder causing the material to fall substantially evenly onto the feeder thereby preventing large amounts of composting material from suddenly collapsing onto the feeder which can result in overload conditions on the feeder drive system application_number US 96271097 A description the present invention is directed to a composting system and agitator capable of maintaining an optimal environment for composting operations while the composting system described herein can be employed in a variety of applications within the scope of the present invention the preferred embodiments described in greater detail below are modular the basic module being an open horizontal bay usually between about 6 and 10 feet wide between about 6 and 8 feet high and up to about 300 feet long a plurality of open bays can be placed side by side and served by a single agitator the system can be used to compost a wide variety of materials and the rate of composting can be regulated to meet varying levels of demand the open bays.