Sinkhole risk in Spokane County, WA: 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 this means before you buy

No soluble bedrock is mapped here, so natural sinkholes are unlikely. Collapses from broken pipes or old mines are a separate risk.

Across 1,764 square miles, under one square mile of Spokane County maps onto soluble rock. With about 555,947 residents (315 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 363 map points about 2.2 miles apart, so a pocket smaller than that can be missed or overstated.

Two things to read before deciding: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Spokane County

The nearest county rated sinkhole country is Emery County, UT, about 683 miles southeast. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Kootenai County, ID 33 mi east · 0% at surface
Benewah County, ID 45 mi southeast · 0% at surface
Lincoln County, WA 47 mi west · 0% at surface
Whitman County, WA 50 mi south · 0% at surface
Stevens County, WA 57 mi north · 3% at surface
Bonner County, ID 60 mi northeast · 1% at surface

Against the rest of Washington

Spokane County ranks 34 of 39 in Washington for soluble rock at the surface, and sits above 0% of US counties on that measure.