Sinkhole risk in Ontonagon County, MI: 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 Ontonagon County
No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.
Across 1,311 square miles, under one square mile of Ontonagon County maps onto soluble rock. With about 5,824 residents (4 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 574 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.
Read next: how these percentages are measured, and the warning signs that apply anywhere.
Counties around Ontonagon County
The nearest county rated sinkhole country is Emmet County, MI, about 222 miles east. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.
- Houghton County, MI 32 mi east · 0% at surface
- Gogebic County, MI 34 mi southwest · 0% at surface
- Baraga County, MI 44 mi east · 0% at surface
- Vilas County, WI 55 mi south · 0% at surface
- Keweenaw County, MI 57 mi northeast · 0% at surface
- Iron County, MI 58 mi southeast · 0% at surface
Against the rest of Michigan
Ontonagon County ranks 69 of 83 in Michigan for soluble rock at the surface, and sits above 0% of US counties on that measure.
- Charlevoix County 11%
- Leelanau County 7%
- Cheboygan County 1%
- Schoolcraft County 1%
- Luce County under 1%