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This document is a Request for Proposals (RFP) for a hydraulic concrete grinder attachment for a CAT 305 mini excavator. The U.S. Army Corps of Engineers Maintenance and Repair Unit is seeking to award a contract for one new hydraulic concrete grinder designed for use on a CAT 305 mini excavator in the 3-8 ton class. The grinder is required to meet specific technical specifications, including cutting head diameter, width, oil flow range, pressure, torque output, cutting force, weight, and input power. The attachment must be compatible with the CAT 305 excavator and include an integrated rotation system. The contractor must deliver and set up the grinder attachment on the government-supplied excavator no later than October 30, 2024. The solicitation is being issued by the Department of the Army Corps of Engineers Engineering District St Paul.