Sinkhole risk in Shoshone County, ID: 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%

What to do about a house in Shoshone County

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 5 of Shoshone County's 2,637 square miles on soluble rock, 5 of them with the rock at or near the surface. With about 14,074 residents (5 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 540 map points about 2.2 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Shoshone County

The nearest county rated sinkhole country is Emery County, UT, about 632 miles southeast. 3 of the 6 closest counties land in the same band; the ground changes quickly around here.

Benewah County, ID 36 mi west · 0% at surface
Mineral County, MT 40 mi east · 37% at surface
Sanders County, MT 43 mi northeast · 20% at surface
Kootenai County, ID 44 mi northwest · 0% at surface
Clearwater County, ID 48 mi south · 0% at surface
Latah County, ID 54 mi southwest · 0% at surface

Which formation it is

The largest mapped soluble unit here is the Wallace formation (meta-argillite), Middle-Proterozoic in age, covering about under 1% of the county.

Against the rest of Idaho

Shoshone County ranks 26 of 44 in Idaho for soluble rock at the surface, and sits above 50% of US counties on that measure.