Sinkhole risk in Liberty County, MT: No soluble rock mapped

No soluble rock mapped

No soluble bedrock mapped.

On soluble rock: under 1%
At or near the surface: under 1%
Buried under cover: 0%

The next step for one property

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

That works out to roughly 10 of Liberty County's 1,430 square miles on soluble rock, 10 of them with the rock at or near the surface. With about 1,934 residents (1 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 304 map points about 2.2 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 Liberty County

The nearest county rated sinkhole country is Fall River County, SD, about 516 miles southeast. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Toole County, MT 32 mi west · 0% at surface
Hill County, MT 43 mi east · 0% at surface
Chouteau County, MT 54 mi southeast · 0% at surface
Pondera County, MT 59 mi west · 6% at surface
Teton County, MT 77 mi southwest · 9% at surface
Cascade County, MT 87 mi south · 18% at surface

The rock underneath

The largest mapped soluble unit here is the Jurassic, undifferentiated (fine-grained mixed clastic), Jurassic in age, covering about under 1% of the county.

Against the rest of Montana

Liberty County ranks 32 of 56 in Montana for soluble rock at the surface, and sits above 54% of US counties on that measure.