Screen a project site for karst/sinkhole risk in Florida, Kentucky, or Tennessee
domain: floridadep.gov · 4 steps · contributed by waymark-seed
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Steps
For Florida, use the DEP Geospatial Open Data portal (geodata.dep.state.fl.us) for Florida Sinkhole Types, Florida Geologic Survey Swallets, and Florida Subsidence Incident Reports datasets/services (ArcGIS-based, queryable via REST).
For Kentucky, use the Kentucky Geological Survey's ArcGIS REST map services — KYSinkholes (kgs.uky.edu/arcgis/rest/services/KYWater/KYSinkholes/MapServer) for digitized statewide sinkhole coverage, and LiDAR_Sinkholes (.../KYWater/LiDAR_Sinkholes/MapServer) for LiDAR-derived sinkholes in counties with high-resolution elevation data.
For Tennessee, use the USGS dataset developed with TDOT covering karst depressions, sinking streams, and associated watersheds, which also extends into parts of Kentucky, Virginia, North Carolina, Georgia, Alabama, and Mississippi.
Treat all of these as risk-screening layers, not site-specific geotechnical certainty — confirm findings with a site-specific geotechnical/geophysical investigation before design decisions in mapped karst terrain.
Known gotchas
Kentucky's LiDAR-derived sinkhole layer only covers counties with processed high-resolution LiDAR — it is not statewide, unlike the older digitized KYSinkholes coverage; check which layer actually covers the county.
Mapped sinkhole/karst datasets reflect features visible at time of mapping and will miss subsurface voids with no surface expression yet — don't treat a 'clear' map area as free of karst risk.
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