Harrison County, MO Shrink-Swell Risk

Harrison County, MO's soil, for shrink-swell risk

Moderate

Harrison County, MO: USDA's soil survey rates 50.6% of the county "Moderate" for shrink-swell potential (5.65% 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 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, MO 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 Harrison County, MO compares

Nationally, Harrison County, MO is the 195-most-constrained of 3,085 rated counties for shrink-swell soil. Within Missouri alone it ranks 21 of 114. Harrison County, MO is 723 square miles with a population of 8,186.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Mercer County, OH and Alleghany 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 Missouri

Every county in Missouri is on this site, including Monroe County, MO and Ste. Genevieve County, MO. The full underlying dataset is downloadable directly, one row per county.