Sinkhole risk in Noble County, IN: No soluble rock mapped

No soluble rock mapped

No soluble bedrock mapped.

On soluble rock: under 1%
At or near the surface: 0%
Buried under cover: under 1%

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.

That works out to roughly 2 of Noble County's 411 square miles on soluble rock. With about 47,811 residents (116 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 392 map points about 1.0 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Noble County

The nearest county rated sinkhole country is Barry County, MI, about 82 miles north. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

LaGrange County, IN 16 mi north · 0% at surface
Whitley County, IN 19 mi south · 0% at surface
DeKalb County, IN 21 mi east · 0% at surface
Kosciusko County, IN 26 mi southwest · 0% at surface
Elkhart County, IN 27 mi northwest · 0% at surface
Steuben County, IN 27 mi northeast · 0% at surface

Which formation it is

The largest mapped soluble unit here is the Muscatatuck Group (limestone), Devonian in age, covering about under 1% of the county.

Against the rest of Indiana

Noble County ranks 70 of 92 in Indiana for soluble rock at the surface, and sits above 0% of US counties on that measure.