The U.S. Army Corps of Engineers seeks a contractor to fabricate Strut Arm Assemblies for Miter Gates on the Upper Mississippi River, involving steel castings, machining, and extensive QC/QA testing. The fabricator must hold specific AISC certifications, including a fracture critical endorsement, plus an AISC Quality Certification for sophisticated paint systems (Category P1, P2, or P3). This opportunity is 100% set-aside for small businesses under NAICS 332312 (500-employee size standard). Deliveries will be made to the USACE Service Base in Fountain City, WI no later than 30 March 2028. No budget amount is specified in the description.