Sinkhole risk in Teton County, ID: Mostly deep or small

Mostly deep or small

Some soluble rock, mostly deeply buried or in a small share of the county.

On soluble rock: 7%
At or near the surface: 7%
Buried under cover: 0%

The next step for one property

Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.

That works out to roughly 30 of Teton County's 449 square miles on soluble rock, 30 of them with the rock at or near the surface. With about 12,932 residents (29 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 302 map points about 1.2 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Teton County

The nearest county rated sinkhole country is Emery County, UT, about 329 miles south. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Madison County, ID 22 mi west · 5% at surface
Bonneville County, ID 33 mi southwest · 17% at surface
Fremont County, ID 34 mi northwest · 9% at surface
Teton County, WY 44 mi northeast · 14% at surface
Jefferson County, ID 55 mi west · 0% at surface
Clark County, ID 68 mi northwest · 14% at surface

What Teton County is built on

The largest mapped soluble unit here is the Limestone, sandstone, dolostone, and chert; Permian to Pennsylvanian marine epicontinental-basin deposits; southeastern Idaho; (limestone), Early Permian to Early Pennsylvanian in age, covering about 3% of the county. Next is the Shale, limestone, and sandstone; Triassic marine to non-marine epicontinental deposits (subunits are TRl and TRu) at 3%.

Against the rest of Idaho

Teton County ranks 16 of 44 in Idaho for soluble rock at the surface, and sits above 65% of US counties on that measure.