4th Ave S Over ARGO Bridge Repair

The City of Seattle, Department of Finance and Administrative Services is requesting sealed bids for the 4th Ave S Over ARGO Bridge Repair project (PW#2024-017), with bids due August 5, 2026. The project requires Women and Minority-Owned Business Enterprise (WMBE) participation under an Inclusion Plan with a minimum responsiveness score of 10 points, and all bidders must comply with Community Workforce Agreement and prevailing wage obligations.

The scope covers pier corbel rehabilitation including crack injection, concrete spall repair, Carbon Fiber Reinforced Polymer strengthening, partial corbel demolition, concrete overhang depth increases using new reinforced concrete with dowel connections, external post-tensioning, and expansion joint replacement. The work requires a 77-day full bridge closure with temporary traffic control and channelization. Rebar Installation and Structural Steel Installation are identified subcontractor work categories triggering the Bidder/Subcontractor List requirement. The project is located in Seattle's Industrial District along 4th Avenue South over the ARGO Yard, north of S Dawson Street and south of S Industrial Way.

The Engineer's Estimate ranges from $6.7 million to $7 million. Project funding sources include Commercial Parking Tax, Gas Tax, Real Estate Excise Tax, and General Fund. The project is funded through these sources over an undisclosed contract term.

Bidders must submit a bid guaranty equal to 5 percent of the total bid including retail sales tax (cashier's check, certified check, or bid bond) and comply with responsible bidder criteria under RCW 39.04.350, including Washington State contractor registration, UBI number, industrial insurance coverage, and Labor and Industries training verification. Recycled materials percentages for construction aggregate and concrete must be proposed and will serve as a tiebreaker if two or more lowest responsive bids are equal. Bid submission occurs through the OpenGov procurement portal. Technical documents attached include bid forms, 27-sheet structural and site drawings, and a project manual with detailed specifications.