Sinkhole risk in Kerr County, TX: Pockets of it

Pockets of it

Soluble rock at the surface or under thin cover in part of the county.

On soluble rock: 99%
At or near the surface: 99%
Buried under cover: 0%

What to do about a house in Kerr County

Check the parcel against your state survey sinkhole map, and ask for an inspection if cracks, depressions or sticking doors show up.

That works out to roughly 1,095 of Kerr County's 1,103 square miles on soluble rock, 1,095 of them with the rock at or near the surface. With about 53,900 residents (49 per square mile), there is effectively nowhere in the county off the soluble rock, town or country. The figures come from 256 map points about 2.1 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Kerr County

The nearest county rated sinkhole country is Runnels County, TX, about 129 miles north. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Bandera County, TX 22 mi south · 96% at surface
Real County, TX 30 mi southwest · 96% at surface
Gillespie County, TX 32 mi northeast · 89% at surface
Kimble County, TX 37 mi northwest · 97% at surface
Kendall County, TX 41 mi east · 98% at surface
Mason County, TX 46 mi north · 46% at surface

What Kerr County is built on

The largest mapped soluble unit here is the Edwards Limestone (limestone), Early Cretaceous in age, covering about 76% of the county. Next is the Glen Rose Limestone at 22%.

Against the rest of Texas

Kerr County ranks 1 of 254 in Texas for soluble rock at the surface, and sits above 99% of US counties on that measure.