Welcome to the Illinois 100/106, Florence Bridge, River Crossing Project website. The Illinois Department of Transportation (IDOT) maintains a lift bridge at Florence, Illinois which is located on Illinois Routes 100 and 106 at the Scott/Pike County Line. This bridge was built in 1929 and is now considered functionally obsolete and structurally deficient.

  • "Structurally deficient" means that bridge elements need to be monitored. Being structurally deficient does not imply that a bridge is structurally unsafe. It means the bridge must be inspected, and maintained and repaired as needed.
  • "Functionally obsolete" means that its width, carrying capacity, vertical clearance, or alignment no longer meets the demands of today's modern vehicles.

The focus of this three-year study is to determine how to improve the existing Illinois 100/106 Bridge Crossing over the Illinois River while minimizing impacts to the environment and the surrounding area.

Information about this study's goals, timeline, and ways to get involved and provide your input can be found on this website. Visit often for the latest updates, and sign up to receive email notices on study activities and progress.

Study Area

Study Area Map

Enlarged View