Sinkhole risk in Kendall 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: 98%
At or near the surface: 98%
Buried under cover: 0%

The next step for one property

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 651 of Kendall County's 662 square miles on soluble rock, 651 of them with the rock at or near the surface. With about 51,828 residents (78 per square mile), there is effectively nowhere in the county off the soluble rock, town or country. The figures come from 299 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Kendall County

The nearest county rated sinkhole country is Runnels County, TX, about 152 miles northwest. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Comal County, TX 29 mi east · 92% at surface
Blanco County, TX 29 mi northeast · 90% at surface
Gillespie County, TX 30 mi northwest · 89% at surface
Bandera County, TX 35 mi west · 96% at surface
Bexar County, TX 36 mi south · 42% at surface
Kerr County, TX 41 mi west · 99% at surface

What Kendall County is built on

The largest mapped soluble unit here is the Glen Rose Limestone (limestone), Early Cretaceous in age, covering about 78% of the county. Next is the Edwards Limestone at 20%.

Against the rest of Texas

Kendall County ranks 3 of 254 in Texas for soluble rock at the surface, and sits above 99% of US counties on that measure.