Sinkhole risk in Hamilton 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%

The next step for one property

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

Across 435 square miles, under one square mile of Hamilton County maps onto soluble rock. With about 7,818 residents (18 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 389 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 Hamilton County

The nearest county rated sinkhole country is Hardin County, IL, about 42 miles south. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

White County, IL 20 mi east · 0% at surface
Franklin County, IL 22 mi west · 0% at surface
Saline County, IL 23 mi south · under 1% at surface
Wayne County, IL 25 mi north · 0% at surface
Jefferson County, IL 26 mi northwest · 0% at surface
Gallatin County, IL 28 mi southeast · 0% at surface

Against the rest of Illinois

Hamilton County ranks 55 of 102 in Illinois for soluble rock at the surface, and sits above 0% of US counties on that measure.