Lewis County, MO Shrink-Swell Risk

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

Moderate

Lewis County, MO: USDA's soil survey rates 48.8% of the county "Moderate" for shrink-swell potential (5.32% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What Lewis County's reading doesn't cover

Two lots a mile apart in Lewis County can carry different soil, even though they share one countywide reading. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Lewis County.

What it costs to find out, versus to ignore it

With Lewis 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 Lewis County, MO compares

Nationally, Lewis County, MO is the 240-most-constrained of 3,085 rated counties for shrink-swell soil. Within Missouri alone it ranks 28 of 114. The county spans 505 square miles, home to 9,852 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Johnson County, NE and Tuolumne County, CA 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 Bollinger County, MO and Ray County, MO. The full underlying dataset is downloadable directly, one row per county.