Sinkhole risk in Garfield County, MT: 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 4,677 square miles, under one square mile of Garfield County maps onto soluble rock. With about 1,181 residents (0 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 284 map points about 4.1 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 Garfield County

The nearest county rated sinkhole country is Fall River County, SD, about 327 miles southeast. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Petroleum County, MT 58 mi west · 0% at surface
McCone County, MT 63 mi northeast · 0% at surface
Treasure County, MT 73 mi south · 0% at surface
Valley County, MT 76 mi north · 0% at surface
Prairie County, MT 77 mi southeast · 0% at surface
Rosebud County, MT 77 mi south · 0% at surface

Against the rest of Montana

Garfield County ranks 42 of 56 in Montana for soluble rock at the surface, and sits above 0% of US counties on that measure.