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M-13/M-84 (Lafayette Street) bridge replacement - Bay County

About this project

MDOT will demolish and replace the M-13/M-84 (Lafayette Street) bascule bridge in Bay City, Bay County. Work will begin in spring 2024 and continue through summer 2027. This approximately $112 million investment will include demolishing the aging structure and building a new bridge. The new bridge will be a safe and reliable crossing over the Saginaw River that will include a new 8-foot-wide shared-use path.


Project details

Schedule
TBD

Location
Bay City
Bay County

Benefits
Increased safety
Increased reliability

Cost
$112 million

Contact
Bay City TSC
989-754-7443

Project information

    • The bridge will be closed to traffic and detoured.
    • Traffic will be detoured via M-13 and Wenona/Henry Street west of the Saginaw River to M-25 (Veterans Memorial Bridge) and M-84 east of the river. Drivers may also opt to detour via M-13 and I-75 over the Zilwaukee Bridge to the south of Bay City.
    • The Middleground Island will remain accessible from Salzburg Avenue on the west side of the river. The non-bascule portion of the bridge will remain open during this project.
  • In preparation for the work on the bridge, MDOT will be improving several roadways along the detour route, including resurfacing Wenona/Henry Street.

    A two-month window is planned for the work on Wenona/Henry Street detour prior to work beginning on the bridge.

Additional information

This $112 million investment is being funded with $90 million of federal funding, $20 million of state funding, and $2 million from local sources. Approximately $73 million is being funded through the Bipartisan Infrastructure Program grant.