The Chicago Department of Transportation (CDOT) will begin emergency repair work on the State Street Bascule Bridge over the main branch of the Chicago River starting Monday, April 28, 2025. The work will require a full closure of the bridge to all vehicular and pedestrian traffic through mid-November 2025.

The scope of work involves removing and replacing floor beams and rehabilitating multiple center lock components. Additional viaduct repairs north of the bridge will also be constructed.

Detour information

• Northbound vehicular traffic: From northbound State St, detour to westbound Wacker Dr, to northbound Dearborn St, to eastbound Kinzie St, back to northbound State St.
• Southbound vehicular traffic: From southbound State St, detour to westbound Kinzie St, to southbound Clark St, to eastbound Wacker Dr, back to southbound State St.
• Pedestrians can use Dearborn Street or Wabash Avenue as alternate routes.
• Bicyclists can use the existing protected bike lane on Dearborn Street.
• CTA reroutes are currently being finalized.

View and download an informational flyer about the project here: State St Bascule Bridge and Viaduct Repair