Specifications include, but are not limited to: The ditcher shall be an extra heavy-duty, PTO-driven, trailer type unit designed for highway ditch construction and cleaning operations. It shall utilize a single rotating cutter head to remove and discharge materials from the ditch as a tractor pulls the ditcher forward. Each unit shall be furnished with identical equipment, options, and features. Units supplied to this specification shall meet or exceed these requirements. POWER DISTRIBUTION: The unit shall be powered by a 540 rpm PTO driveshaft from the rear of the tractor. 3.1. A PTO driveshaft shall connect to a hydraulic pump. 3.2. The hydraulic pump shall supply sufficient flow to precisely and quickly operate hydraulic cylinders to position the ditching head and to operate the hydraulic motor. 3.3. The hydraulic motor shall power a planetary drive type gearbox to rotate the ditching head.