Sinkhole risk in Hill 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 2,899 square miles, under one square mile of Hill County maps onto soluble rock. With about 16,065 residents (6 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 326 map points about 3.0 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 Hill County
The nearest county rated sinkhole country is Fall River County, SD, about 490 miles southeast. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.
- Liberty County, MT 43 mi west · under 1% at surface
- Chouteau County, MT 54 mi south · 0% at surface
- Blaine County, MT 54 mi east · under 1% at surface
- Toole County, MT 74 mi west · 0% at surface
- Pondera County, MT 101 mi west · 6% at surface
- Phillips County, MT 103 mi east · under 1% at surface
Against the rest of Montana
Hill County ranks 43 of 56 in Montana for soluble rock at the surface, and sits above 0% of US counties on that measure.
- Meagher County 49%
- Mineral County 37%
- Judith Basin County 33%
- Lincoln County 29%
- Broadwater County 27%