Description
The U.S. Army Corps of Engineers is seeking a qualified contractor to replace the existing Navigation Lock 1 bridge at Bonneville Lock and Dam with a new single‑span, steel‑girder, concrete‑deck bridge. The scope includes design, demolition of the existing structure, lead and asbestos remediation, construction of new concrete abutments (rock‑anchored stub and drilled‑shaft abutment), installation of four built‑up steel plate girders, roadway approaches, a 5‑ft sidewalk, and related site work. Work must be phased to keep the bridge open for vehicular traffic throughout construction, and in‑water activities are limited to designated “in‑water work” windows (Dec 1 – Feb 28) in 2029 and 2030. The contractor must manage barge operations, high‑voltage power‑line clearances, marine mammal protections, and compliance with extensive environmental permits (IHA, lead/asbestos, fish salvage). The period of performance is up to 930 days after Notice‑to‑Proceed.
• Replace existing bridge with a 34‑ft‑4½‑in wide, two‑lane steel‑girder bridge.
• Perform partial demolition, lead & asbestos removal, and seismic mitigation.
• Conduct in‑water work (barging, cofferdam, jet‑grouting) only during approved windows.
• Coordinate with high‑voltage BPA transmission line and marine‑life protection measures.
• Provide traffic‑control plans, construction‑management platform, and extensive reporting via the government‑provided CMP system.