From Mapping to Mitigation: New Geologic Mapping and Emergency Slope Failure Response along SR 56 in Madison, Indiana

From Mapping to Mitigation: New Geologic Mapping and Emergency Slope Failure Response along SR 56 in Madison, Indiana

This presentation will highlight recent geologic mapping efforts done by the Indiana Geological and Water Survey, including detailed bedrock mapping at a finer scale than previously available and updated landslide inventory mapping focused on southeastern Indiana. The second part of the presentation will cover the emergency response to a significant slope failure that occurred along SR 56 in Madison following heavy rainfall in March and April 2025. The reactivation of a known landslide led to a major road failure, creating a public safety hazard and forcing the closure of this heavily traveled route. Due to the critical nature of the road and the excessively long detour, INDOT had to act quickly and creatively, both in managing traffic during the closure and expediting emergency repairs. This presentation will explore how INDOT adapted to evolving site conditions and rapidly advanced the project to contract letting and construction.