Donley County, TX Shrink-Swell Risk
Shrink-swell potential in Donley County, TX
Low
Soil across 94.4% of Donley County, TX comes back "Low" in USDA's shrink-swell data, averaging 1.77% linear extensibility. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Donley County, TX - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Donley County will actually do.
Donley County: the real numbers
Donley County's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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.
Donley County's rank among Texas counties
Among the 3,085 rated counties on this site, Donley County, TX ranks 2,200 most-constrained nationally, and 242 of 253 within Texas. Donley County covers 927 square miles and counts 3,193 residents.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Allendale County, SC and Hamilton County, KS 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
Elsewhere in Texas
Every county in Texas is on this site, including Calhoun County, TX and Hartley County, TX. The full underlying dataset is downloadable directly, one row per county.