To support ODNR Division of Geological Survey efforts to investigate, identify, and map karst features across Ohio, we have created a reporting form for Ohio citizens to fill out and submit if they are aware of such features. While we are primarily concerned with the karst features known as sinkholes, we welcome any information on karst caverns, caves, and disappearing streams.
Reporting form instructions
Please fill out the report below on suspected karst features of any size. Provide as much of the requested information as possible. If you know the coordinates of the feature (latitude and longitude from a map or GPS receiver), please provide that information as well.