Sinkhole risk in Menard 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 Menard County

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

Across 314 square miles, under one square mile of Menard County maps onto soluble rock. With about 11,963 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 328 map points about 1.0 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 Menard County

The nearest county rated sinkhole country is Calhoun County, IL, about 75 miles southwest. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Mason County, IL 16 mi northwest · 0% at surface
Sangamon County, IL 20 mi south · 0% at surface
Logan County, IL 24 mi east · 0% at surface
Cass County, IL 24 mi west · 0% at surface
Morgan County, IL 30 mi southwest · 0% at surface
Tazewell County, IL 37 mi northeast · 0% at surface

Against the rest of Illinois

Menard County ranks 77 of 102 in Illinois for soluble rock at the surface, and sits above 0% of US counties on that measure.