Specifications include, but are not limited to: Equipment minimum qualifications, pulling capacity of 2 cars min., travel speed up to 25 mph and working speed greater than 1 mph Excavate/clean 30-inches laterally measured from end of crosstie outward to field. Excavate to depth of up to 8-inches below bottom of crosstie Undercut the ends of crossties up to 5-inches and scarify the subgrade to breakup any mud caps beneath the tie ends. Scarifying equipment shall have teeth and/or blades to slope bottom of excavation away from the track to facilitate proper drainage. Adjustable ballast cleaning screen to allow aggregate size setting from 5/8-inch to 1-inch for screening material. Distribute returned ballast to either side of the track in tangent or curved track. Regulate/plow returned ballast to fit within standard track cross-section (capable of cleaning stones from the top of the tie and tie plate) Carry excavated materials over crossings, turnouts, bridges, signals and other obstructions. Convey waste materials into railroad-provided cars, including “slot” cars, coupled onto the shoulder cleaner consist or spotted on a parallel track. Convey waste material to either side of the track distance from track center material can be discharged by conveyor, 180 degree swing. Pull air-dump and other cars as part of consist and supply air to operate brakes. The equipment consist must be self-propelled. Contractor will see that the Shoulder Ballast Cleaning apparatus conforms to the clearance requirements of the ARRC.