Project Description: This project rehabilitates the existing 4th Ave S over ARGO Bridge pier corbels using a 77 day full closure of the bridge. Work involves crack injection, concrete spall repair, Carbon Fiber Reinforced Polymer strengthening, partial demolition of select corbels, increasing the depth of the concrete overhangs using new reinforced concrete connected to the existing concrete using dowels, additional of external post-tensioning, and replacement of expansion joints. Temporary traffic control and channelization will be required. For the purpose of the Bidder/Subcontractor List, this project includes Rebar Installation and Structural Steel Installation.Engineer's Estimate: $6,700,000 to $7,000,000Project Location: Industrial District along 4th Avenue South over the ARGO Yard; north of S Dawson St and south of S Industrial Way.

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Release Project Date:July 1, 2026Pre-Proposal Meeting (Non-Mandatory):July 16, 2026, 11:00amJoin using the Microsoft Teams meeting link:https://teams.microsoft.com/meet/258807910083528?p=FXdYjaiEnIrjGGqrfNJoin using the Microsoft Teams meeting number:Meeting ID: 258 807 910 083 528, Passcode: cR3Cq7yPJoin by phone:+1 206-686-8357, Phone conference ID: 579 089 565# Join on a video conferencing device:Tenant key: seattle@m.webex.com, Video ID: 113 129 509 2Question Submission Deadline:July 30, 2026, 5:00pmBid Open Date:August 5, 2026, 2:00pm

Please see the Attachments section for specifications and attachments.

Kevin FounProject Engineer700 5th AveSeattle, WA 98104Email: kevin.foun@seattle.govPhone: (206) 561-4312

Ian HernandezSr. Construction Contracting Specialist700 5th Ave, Ste 4350Seattle, WA 98104Email: ian.hernandez@seattle.govPhone: (206) 684-0128