Sinkhole count based on visual scan of some TN topos.
Click on cell for quadname and sink count.
Based on 3x3 cells over a topo quad.
TN 7.5' topo is about 60 sq miles so
each cell is about 6.7 sq miles.
The higest density cell (623 sinkholes) is in the Talbott quad.
To see sinkholes on topo map, zoom in and switch to the CalTopo basemap.
See TN sinkholes