Moniteau County, MO Shrink-Swell Risk
What Moniteau County, MO's soil means for a foundation
Moderate
USDA's SSURGO data puts Moniteau County, MO's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.4% across 50.1% of the county's surveyed land. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.
This is a county figure, not a lot figure
USDA's survey covers the whole of Moniteau County, MO at once, not any single address. 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 Moniteau County.
Report cost vs. repair cost
With Moniteau 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.
Where this sits nationally
Nationally, Moniteau County, MO is the 907-most-constrained of 3,085 rated counties for shrink-swell soil. Within Missouri alone it ranks 67 of 114. Moniteau County, MO is 415 square miles with a population of 15,294.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Clare County, MI and Emmet County, IA 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 Carter County, MO and St. Charles County, MO. The full underlying dataset is downloadable directly, one row per county.