Sinkhole risk in Weber County, UT: 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: 9%
At or near the surface: 9%
Buried under cover: 0%

What this means before you buy

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

That works out to roughly 57 of Weber County's 611 square miles on soluble rock, 57 of them with the rock at or near the surface. With about 276,118 residents (452 per square mile), homes are spread across towns and farmland, and a mapped unit may or may not reach the developed parts. The figures come from 495 map points about 1.1 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 Weber County

The nearest county rated sinkhole country is Emery County, UT, about 168 miles south. 4 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Morgan County, UT 20 mi southeast · 9% at surface
Davis County, UT 23 mi southwest · under 1% at surface
Cache County, UT 33 mi north · 41% at surface
Rich County, UT 41 mi northeast · 9% at surface
Salt Lake County, UT 42 mi south · 15% at surface
Summit County, UT 55 mi southeast · 6% at surface

The rock underneath

The largest mapped soluble unit here is the Middle Cambrian shale and carbonate rocks in Salt Lake City-Coalville-Randolph region (carbonate), Middle Cambrian in age, covering about 2% of the county. Next is the Middle Cambrian shale and carbonate rocks in Logan-Huntsville Allochthon at 1%.

Against the rest of Utah

Weber County ranks 16 of 29 in Utah for soluble rock at the surface, and sits above 67% of US counties on that measure.