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This document is a Request for Proposal (RFP) for the Fish Passage Improvement Project at Lock and Dam 22 on the Upper Mississippi River in Missouri and Illinois. The U.S. Army Corps of Engineers, Rock Island District, is soliciting proposals for a project that includes demolition, construction of a rock ramp fishway, concrete bridge, ice and debris boom, sheet piling, concrete work, earthwork, stone and boulder placement, access ramp work, building and deck erection, electrical work, design and installation of computer and monitoring components, cybersecurity, surveying, and site restoration. The estimated contract value is between $25,000,000 and $100,000,000, with a period of performance of 898 consecutive calendar days. The procurement is unrestricted, with a NAICS code of 237990 and a small business size standard of $45 million. Questions regarding the project must be submitted through the Projent platform.