Sinkhole risk in McLean 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 McLean County

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

Across 1,183 square miles, under one square mile of McLean County maps onto soluble rock. With about 172,069 residents (145 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 334 map points about 1.9 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 McLean County

The nearest county rated sinkhole country is Calhoun County, IL, about 133 miles southwest. 5 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 22 mi south · 0% at surface
Woodford County, IL 28 mi northwest · 0% at surface
Livingston County, IL 32 mi northeast · 0% at surface
Ford County, IL 33 mi east · 0% at surface
Tazewell County, IL 35 mi west · 0% at surface
Piatt County, IL 36 mi south · 0% at surface

Against the rest of Illinois

McLean County ranks 70 of 102 in Illinois for soluble rock at the surface, and sits above 0% of US counties on that measure.