Sinkhole risk in Woodbury County, IA: 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 873 square miles, under one square mile of Woodbury County maps onto soluble rock. With about 107,257 residents (123 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 351 map points about 1.6 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Woodbury County

The nearest county rated sinkhole country is Knox County, NE, about 95 miles west. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Monona County, IA 24 mi south · 0% at surface
Plymouth County, IA 25 mi north · 0% at surface
Dakota County, NE 26 mi west · 0% at surface
Ida County, IA 28 mi east · 0% at surface
Thurston County, NE 30 mi southwest · 0% at surface
Cherokee County, IA 32 mi northeast · 0% at surface

Against the rest of Iowa

Woodbury County ranks 97 of 99 in Iowa for soluble rock at the surface, and sits above 0% of US counties on that measure.