The U.S. Army Corps of Engineers, Chicago District, is issuing a Request for Proposal for the acquisition of fill stone and breakwater stone for several harbors in the Great Lakes region. The competition is full and open, unrestricted to business size. An offeror must have an active registration in the System for Award Management (SAM). The applicable NAICS code is 327991 with a small business size standard of 500 employees. The point of contact for this acquisition is Ericka Hillard.