Sinkhole risk in Washington County, ID: 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 Washington County

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

Across 1,453 square miles, under one square mile of Washington County maps onto soluble rock. With about 11,539 residents (8 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 265 map points about 2.3 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how these percentages are measured, and the warning signs that apply anywhere.

Counties around Washington County

The nearest county rated sinkhole country is Emery County, UT, about 489 miles southeast. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Payette County, ID 31 mi south · 0% at surface
Gem County, ID 33 mi southeast · 0% at surface
Adams County, ID 34 mi northeast · under 1% at surface
Baker County, OR 47 mi west · 14% at surface
Canyon County, ID 57 mi south · 0% at surface
Boise County, ID 62 mi southeast · 0% at surface

Against the rest of Idaho

Washington County ranks 44 of 44 in Idaho for soluble rock at the surface, and sits above 0% of US counties on that measure.