Buchanan County, MO Shrink-Swell Risk

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

Moderate

Buchanan County, MO: USDA's soil survey rates 66.5% of the county "Moderate" for shrink-swell potential (4.17% 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 Buchanan County's reading doesn't cover

Two lots a mile apart in Buchanan 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 Buchanan County.

What it costs to find out, versus to ignore it

With Buchanan 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 Buchanan County, MO compares

Nationally, Buchanan County, MO is the 488-most-constrained of 3,085 rated counties for shrink-swell soil. Within Missouri alone it ranks 53 of 114. Buchanan County covers 408 square miles and counts 83,574 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. McIntosh County, OK and Lake County, MI 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 Nodaway County, MO and Pulaski County, MO. The full underlying dataset is downloadable directly, one row per county.