Thomas J O Brien Lock and Dam Major Rehabilitation - Construction, Chicago, Cook County, Illinois

The U.S. Army Corps of Engineers Chicago District is conducting market research for the major rehabilitation of the Thomas J. O’Brien Lock and Dam in Chicago, Illinois. The effort will involve extensive civil‑engineering construction, mechanical and electrical upgrades, and structural repairs on a 110‑ft by 1,000‑ft lock facility, with an estimated performance period of three years. This Sources Sought notice solicits capability statements from firms that can meet large‑scale, high‑risk civil works requirements, including bonding capacity, small‑business participation plans, and potential compliance with a Project Labor Agreement. • Repair and strengthening of guide walls, lock chamber walls, and sector gate machinery; replacement of mechanical, electrical, and control systems. • Installation of new jib cranes, replacement of gates/actuators, upgrades to power supplies, emergency lighting, and roof drainage. • Requirement for firms to demonstrate $45 M+ NAICS 237990 capacity, provide bondability letters, and outline small‑business subcontracting strategies. • Responses due by 2:00 PM Central Time, 27 Nov 2026; no funds provided for preparation.