Sinkhole risk in Waupaca County, WI: 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%

What to do about a house in Waupaca County

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 7 of Waupaca County's 748 square miles on soluble rock. With about 51,171 residents (68 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 343 map points about 1.5 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 Waupaca County

The nearest county rated sinkhole country is Vernon County, WI, about 110 miles southwest. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Shawano County, WI 24 mi northeast · 0% at surface
Outagamie County, WI 25 mi east · 0% at surface
Portage County, WI 26 mi west · 0% at surface
Waushara County, WI 29 mi southwest · 0% at surface
Winnebago County, WI 31 mi southeast · under 1% at surface
Menominee County, WI 38 mi north · 0% at surface

Which formation it is

The largest mapped soluble unit here is the Prairie du Chien Group (shale), Lower Ordovician in age, covering about under 1% of the county.

Against the rest of Wisconsin

Waupaca County ranks 70 of 72 in Wisconsin for soluble rock at the surface, and sits above 0% of US counties on that measure.