Sinkhole risk in Klamath County, OR: Not karst, but voids possible

Not karst, but voids possible

No soluble bedrock; some pseudokarst (piping or lava-tube ground).

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

What this means before you buy

Not true karst, but soil piping or lava tubes can still open voids - mention it to an inspector.

Across 5,950 square miles, under one square mile of Klamath County maps onto soluble rock. With about 70,438 residents (12 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 310 map points about 4.4 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how ground with no limestone still opens up, and how these percentages are measured.

Counties around Klamath County

The nearest county rated sinkhole country is Emery County, UT, about 624 miles east. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Jackson County, OR 56 mi west · 2% at surface
Lake County, OR 64 mi east · 0% at surface
Douglas County, OR 87 mi northwest · 1% at surface
Deschutes County, OR 88 mi north · 0% at surface
Siskiyou County, CA 88 mi southwest · 9% at surface
Modoc County, CA 89 mi southeast · 0% at surface

Against the rest of Oregon

Klamath County ranks 23 of 36 in Oregon for soluble rock at the surface, and sits above 0% of US counties on that measure.