Sinkhole risk in Broomfield 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 to do about a house in Broomfield County

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

Across 33 square miles, under one square mile of Broomfield County maps onto soluble rock. With about 78,323 residents (2,376 per square mile), most of the county is built up, so a mapped unit is likely to sit under somebody's street. The figures come from 272 map points about 0.3 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 Broomfield County

The nearest county rated sinkhole country is Dawes County, NE, about 215 miles northeast. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Denver County, CO 16 mi southeast · 0% at surface
Boulder County, CO 21 mi northwest · 4% at surface
Gilpin County, CO 26 mi west · 0% at surface
Jefferson County, CO 28 mi south · 2% at surface
Clear Creek County, CO 38 mi southwest · 0% at surface
Adams County, CO 38 mi east · 0% at surface

Against the rest of Colorado

Broomfield County ranks 44 of 64 in Colorado for soluble rock at the surface, and sits above 0% of US counties on that measure.