Bonneville Lock and Dam - Navigation Lock 1 Bridge Replacement

The U.S. Army Corps of Engineers is seeking a qualified contractor to replace the existing Navigation Lock 1 bridge at the Bonneville Lock and Dam with a new fixed‑span steel girder bridge on a new alignment. The work includes design, demolition of the existing bridge, construction of new concrete abutments, installation of four built‑up steel plate girders, roadway and sidewalk construction, seismic isolation bearings, and associated approach roadways. The project must remain open to vehicular traffic throughout construction, requiring phased construction. Environmental constraints include lead‑based paint and asbestos remediation, strict hazardous‑waste handling, temporary environmental controls, barge‑crane lifts near a high‑voltage transmission line, and compliance with Oregon storm‑water and historic‑preservation regulations. A professional archaeological monitor is required on‑site for any ground disturbance. The solicitation period closes 08 Oct 2026, with an extended site‑visit registration deadline of 09 Sep 2026. • Replace existing bridge with a 34‑ft‑4½‑in single‑span steel girder bridge (2 travel lanes, shoulders, sidewalk). • Construct new concrete stub and drilled‑shaft abutments; install seismic isolation bearings. • Perform partial demolition of the existing bridge while maintaining traffic flow. • Conduct lead‑based paint and asbestos abatement, hazardous‑waste management, and storm‑water controls. • Coordinate barge‑crane lifts near Bonneville Power Administration transmission line. • Provide professional archaeological monitoring and comply with cultural‑resource requirements. • Submit detailed environmental protection plan, permits, and phased construction schedule.