A special request to our guests: Please report cover-collapse sinkholes!
Researchers at the Kentucky Geological Survey are compiling data about sinkhole collapses. If enough reliable data can be obtained, KGS will develop maps showing the probability that a sinkhole will form. The maps will show the average number of cover-collapse sinkholes that will form in a unit area within a specified period (for example, two sinkholes a year per square mile, on average). It is extremely unlikely that enough data will become available to identify the exact location of future cover-collapse sinkholes. You can contribute to this research project. If you know where and when a sinkhole collapse occurred, please fill out the reporting form. The size of the cover collapse sinkhole does not matter, because the process is the same for all sizes.
You can find more information at Cover-Collapse Sinkholes Page.
Contact: Jim Currens
The above photograph of a cover-collapse sinkhole is from Boyle County. Only the soil has collapsed and, as in most cases, no bedrock is involved. This is an excellent example of the "cookie cutter" clean break of the surface and the overhanging walls.