Clinton County, IA Shrink-Swell Risk

Shrink-swell potential in Clinton County, IA

Moderate

Soil across 70.9% of Clinton County, IA comes back "Moderate" in USDA's shrink-swell data, averaging 3.32% linear extensibility. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Clinton County, IA - 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 Clinton County will actually do.

Clinton County: the real numbers

Clinton 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, Clinton County, IA ranks 961 most-constrained nationally, and 69 of 99 within Iowa. The county spans 695 square miles, home to 46,015 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Tioga County, NY and Outagamie County, WI 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 Iowa

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