Crawford County, IA Shrink-Swell Risk

Crawford County, IA's soil, for shrink-swell risk

Moderate

Crawford County, IA: USDA's soil survey rates 77.3% of the county "Moderate" for shrink-swell potential (3.68% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What Crawford County's reading doesn't cover

Two lots a mile apart in Crawford 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 Crawford County, IA 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 Crawford County, IA compares

Nationally, Crawford County, IA is the 738-most-constrained of 3,085 rated counties for shrink-swell soil. Within Iowa alone it ranks 56 of 99. Crawford County, IA is 714 square miles with a population of 16,378.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Jefferson County, WI and Sumter County, AL 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 Iowa

Every county in Iowa is on this site, including Fayette County, IA and Clarke County, IA. The full underlying dataset is downloadable directly, one row per county.