Sinkhole risk in Marinette County, WI: Mostly deep or small

Mostly deep or small

Some soluble rock, mostly deeply buried or in a small share of the county.

On soluble rock: 23%
At or near the surface: 0%
Buried under cover: 23%

What to do about a house in Marinette County

Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.

That works out to roughly 322 of Marinette County's 1,399 square miles on soluble rock. With about 42,343 residents (30 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 248 map points about 2.4 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why the 23% under cover still counts, and how these percentages are measured.

Counties around Marinette County

The nearest county rated sinkhole country is Wexford County, MI, about 138 miles southeast. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Oconto County, WI 26 mi southwest · under 1% at surface
Menominee County, MI 27 mi northeast · under 1% at surface
Menominee County, WI 41 mi southwest · 0% at surface
Florence County, WI 41 mi northwest · 0% at surface
Forest County, WI 44 mi northwest · 0% at surface
Dickinson County, MI 46 mi north · 0% at surface

Which formation it is

The largest mapped soluble unit here is the Sinnipee Group (dolostone (dolomite)), Ordovician in age, covering about 11% of the county. Next is the Prairie du Chien Group at 10%.

Against the rest of Wisconsin

Marinette County ranks 48 of 72 in Wisconsin for soluble rock at the surface, and sits above 0% of US counties on that measure.