Harrison County, TX Shrink-Swell Risk
Harrison County, TX's soil, for shrink-swell risk
Low
Harrison County, TX: USDA's soil survey rates 56.3% of the county "Low" for shrink-swell potential (2.73% linear extensibility). That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.
What Harrison County's reading doesn't cover
Two lots a mile apart in Harrison 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 Harrison County, TX rating "Low", 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 Harrison County, TX compares
Nationally, Harrison County, TX is the 1,387-most-constrained of 3,085 rated counties for shrink-swell soil. Within Texas alone it ranks 204 of 253. Harrison County, TX is 900 square miles with a population of 71,370.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Newaygo County, MI and Page County, VA 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 Coke County, TX and Refugio County, TX. The full underlying dataset is downloadable directly, one row per county.