Two-Week Closure of Michigan Street Bridge Begins Jan. 3

The Michigan Street Bridge in Sturgeon Bay will close to vehicle and pedestrian traffic at noon on Tuesday, Jan. 3, and reopen Friday, Jan. 20. The daily closures are necessary to repair nine bridge beams damaged in a vehicle strike. The bridge will continue to open for marine traffic while repairs take place. Detour signs will direct motorists, bicyclists and pedestrians to use the Maple/Oregon Street Bridge. The Bayview Bridge is another alternate route to consider during the repair work.

A semi-truck towing a backhoe struck multiple overhead support beams on Friday, April 22. Maintenance crews closed the bridge to all traffic, inspected the damage, and reopened the bridge the following day.

The Wisconsin Department of Transportation (WisDOT) Bureau of Structures engineers, Northeast Region bridge engineers and Door County Highway Department staff will conduct the repairs on the bridge’s east span. The repairs will cost approximately $200,000. The driver of the semi towing the backhoe that struck the bridge is responsible for all repair costs.

Repairs consist of cutting the damaged beams out and bolting new beams in place. Due to the age of the beams, WisDOT used three-dimensional imaging technology (LiDAR) to create specifications for prefabrication of new beams to exactly replicate the damaged beams. An off-site facility prefabricated the replacement parts and transported them to Sturgeon Bay for repair when the shipping season ended. Repairing the bridge in winter lessens the impact for marine and motor vehicle traffic. Engineers plan to heat-straighten, in place, one of the nine beams. All of the repair work is weather dependent.

For daily construction information or changes to construction schedules for this project and all WisDOT Northeast Region construction project, please follow the Northeast Region Twitter account at


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