Sinkhole risk in Jackson County, OR: 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: 2%
At or near the surface: 2%
Buried under cover: 0%

What to do about a house in Jackson County

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

That works out to roughly 50 of Jackson County's 2,783 square miles on soluble rock, 50 of them with the rock at or near the surface. With about 221,331 residents (80 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 335 map points about 2.9 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Jackson County

The nearest county rated sinkhole country is Emery County, UT, about 668 miles east. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Josephine County, OR 46 mi west · 9% at surface
Klamath County, OR 56 mi east · 0% at surface
Siskiyou County, CA 57 mi south · 9% at surface
Douglas County, OR 65 mi north · 1% at surface
Curry County, OR 78 mi west · under 1% at surface
Del Norte County, CA 81 mi southwest · under 1% at surface

Which formation it is

The largest mapped soluble unit here is the Sedimentary rocks, partly metamorphosed (Triassic and Paleozoic) (mudstone), Paleozoic to Jurassic(?) in age, covering about 2% of the county.

Against the rest of Oregon

Jackson County ranks 5 of 36 in Oregon for soluble rock at the surface, and sits above 57% of US counties on that measure.