Webster County, IA Shrink-Swell Risk

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

Moderate

Webster County, IA: USDA's soil survey rates 49.5% of the county "Moderate" for shrink-swell potential (3.96% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What Webster County's reading doesn't cover

Two lots a mile apart in Webster County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Webster County will actually do.

What it costs to find out, versus to ignore it

With Webster 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.

Where this sits nationally

Nationally, Webster County, IA is the 589-most-constrained of 3,085 rated counties for shrink-swell soil. Within Iowa alone it ranks 44 of 99. Webster County covers 716 square miles and counts 36,909 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Baraga County, MI and Coshocton County, OH 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 Adair County, IA and Buena Vista County, IA. The full underlying dataset is downloadable directly, one row per county.