Throckmorton County, TX Shrink-Swell Risk
Throckmorton County, TX's soil, for shrink-swell risk
Moderate
Throckmorton County, TX: USDA's soil survey rates 56.4% of the county "Moderate" for shrink-swell potential (4.9% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.
What Throckmorton County's reading doesn't cover
Two lots a mile apart in Throckmorton 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 Throckmorton 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.
How Throckmorton County, TX compares
Nationally, Throckmorton County, TX is the 309-most-constrained of 3,085 rated counties for shrink-swell soil. Within Texas alone it ranks 74 of 253. Throckmorton County covers 913 square miles and counts 1,532 residents.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Mackinac County, MI and Placer County, CA 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 Blanco County, TX and Burleson County, TX. The full underlying dataset is downloadable directly, one row per county.