Putnam County, MO Shrink-Swell Risk

Putnam County's SSURGO shrink-swell reading

Moderate

In Putnam County, MO, 49.5% of the surveyed soil carries a "Moderate" shrink-swell rating, 5.4% linear extensibility on average. A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

Before you rely on this for one address

Putnam County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Putnam County.

Budgeting for Putnam County, MO

Putnam 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, Putnam County, MO ranks 228 most-constrained nationally, and 26 of 114 within Missouri. The county spans 517 square miles, home to 4,539 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Clay County, KY and McCook County, SD 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 Missouri

Every county in Missouri is on this site, including Daviess County, MO and Cape Girardeau County, MO. The full underlying dataset is downloadable directly, one row per county.