Sinkhole risk in Klickitat County, WA: 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%

The next step for one property

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

Across 1,872 square miles, under one square mile of Klickitat County maps onto soluble rock. With about 24,124 residents (13 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 301 map points about 2.5 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: how ground with no limestone still opens up, and how these percentages are measured.

Counties around Klickitat County

The nearest county rated sinkhole country is Emery County, UT, about 697 miles southeast. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Sherman County, OR 33 mi south · 0% at surface
Yakima County, WA 41 mi north · 0% at surface
Gilliam County, OR 42 mi southeast · 0% at surface
Hood River County, OR 49 mi southwest · 0% at surface
Wasco County, OR 52 mi south · 0% at surface
Skamania County, WA 57 mi west · 0% at surface

Against the rest of Washington

Klickitat County ranks 26 of 39 in Washington for soluble rock at the surface, and sits above 0% of US counties on that measure.