Callahan County, TX Shrink-Swell Risk
Callahan County, TX's soil, for shrink-swell risk
Moderate
Callahan County, TX: USDA's soil survey rates 58.8% of the county "Moderate" for shrink-swell potential (5.23% linear extensibility). A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.
What Callahan County's reading doesn't cover
Two lots a mile apart in Callahan County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).
What it costs to find out, versus to ignore it
With Callahan County, TX rating "Moderate", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. A geotechnical report runs $1,000-$5,000, typically around $2,700. Foundation repair, if a specific lot turns out to differ from the county average, runs $5,000-$15,000.
Where this sits nationally
Nationally, Callahan County, TX is the 251-most-constrained of 3,085 rated counties for shrink-swell soil. Within Texas alone it ranks 65 of 253. The county spans 899 square miles, home to 14,615 people.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Wayne County, TN and Cuyahoga County, OH are worth a look for comparison.
How this reading is built, and its real limits · Moisture management: the cheap fix that works on any soil
More of Texas
Every county in Texas is on this site, including Medina County, TX and Hunt County, TX. The full underlying dataset is downloadable directly, one row per county.