Sinkhole risk in Piatt County, IL: 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 Piatt County

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

Across 439 square miles, under one square mile of Piatt County maps onto soluble rock. With about 16,628 residents (38 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 345 map points about 1.1 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: why gypsum and salt move faster than limestone, and how these percentages are measured.

Counties around Piatt County

The nearest county rated sinkhole country is Monroe County, IN, about 125 miles southeast. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

De Witt County, IL 20 mi northwest · 0% at surface
Macon County, IL 22 mi southwest · 0% at surface
Champaign County, IL 23 mi northeast · 0% at surface
Moultrie County, IL 26 mi south · 0% at surface
Douglas County, IL 26 mi southeast · 0% at surface
McLean County, IL 36 mi north · 0% at surface

Against the rest of Illinois

Piatt County ranks 84 of 102 in Illinois for soluble rock at the surface, and sits above 0% of US counties on that measure.