Sinkhole risk in Washington County, CO: 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 2,518 square miles, under one square mile of Washington County maps onto soluble rock. With about 4,771 residents (2 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 335 map points about 2.7 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: why gypsum and salt move faster than limestone, and how these percentages are measured.

Counties around Washington County

The nearest county rated sinkhole country is Dawes County, NE, about 190 miles north. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Morgan County, CO 38 mi northwest · 0% at surface
Yuma County, CO 42 mi east · 7% at surface
Logan County, CO 53 mi north · 0% at surface
Kit Carson County, CO 56 mi southeast · 0% at surface
Adams County, CO 60 mi west · 0% at surface
Phillips County, CO 63 mi northeast · 0% at surface

Against the rest of Colorado

Washington County ranks 63 of 64 in Colorado for soluble rock at the surface, and sits above 0% of US counties on that measure.