San Jacinto County, TX Shrink-Swell Risk
Shrink-swell potential in San Jacinto County, TX
Moderate
Soil across 70.5% of San Jacinto County, TX comes back "Moderate" in USDA's shrink-swell data, averaging 3.37% linear extensibility. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in San Jacinto 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 San Jacinto County will actually do.
San Jacinto County: the real numbers
San Jacinto 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.
Where this sits nationally
Among the 3,085 rated counties on this site, San Jacinto County, TX ranks 930 most-constrained nationally, and 170 of 253 within Texas. San Jacinto County covers 569 square miles and counts 29,326 residents.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Bear Lake County, ID and Butte County, SD 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 Menard County, TX and Hood County, TX. The full underlying dataset is downloadable directly, one row per county.