Sinkhole risk in Polk County, NC: No soluble rock mapped

No soluble rock mapped

No soluble bedrock mapped.

On soluble rock: 0%
At or near the surface: 0%
Buried under cover: 0%

What to do about a house in Polk County

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 238 square miles, under one square mile of Polk County maps onto soluble rock. With about 20,320 residents (85 per square mile), homes are spread across towns and farmland, and a mapped unit may or may not reach the developed parts. The figures come from 280 map points about 0.9 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Polk County

The nearest county rated sinkhole country is Cocke County, TN, about 69 miles northwest. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Rutherford County, NC 16 mi northeast · 0% at surface
Henderson County, NC 18 mi west · 3% at surface
Spartanburg County, SC 26 mi southeast · 0% at surface
McDowell County, NC 29 mi north · 4% at surface
Greenville County, SC 29 mi southwest · 0% at surface
Buncombe County, NC 31 mi northwest · 3% at surface

Against the rest of North Carolina

Polk County ranks 90 of 100 in North Carolina for soluble rock at the surface, and sits above 0% of US counties on that measure.