This document contains a federal contract opportunity solicitation for upstream approach wall construction work at the Soo Lock Complex in Sault Ste. Marie, Michigan. The Detroit District of the US Army Corps of Engineers is seeking a firm fixed price construction contract to accomplish work attaching to the solicitation documentation, with an intended start date within 30 days of contract award. The NAICS code is 237990 for other heavy and civil engineering construction, and the size standard is $39.5 million. There is no set-aside designated. Interested offerors should monitor beta.SAM.gov for any amendments, updates, or responses to industry questions regarding the solicitation. The primary point of contact is the contract specialist Steve Hutchens of the Detroit District.