Mississippi County, MO Shrink-Swell Risk

Shrink-swell potential in Mississippi County, MO

High

Soil across 44.7% of Mississippi County, MO comes back "High" in USDA's shrink-swell data, averaging 6.11% linear extensibility. This is enough movement to matter: a standard footing can hold up here, but usually only with real moisture management, not by default.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Mississippi County, MO - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Mississippi County: the real numbers

Mississippi County's soil reading is exactly the case where a report before construction, or before cracks widen, pays for itself. A geotechnical report runs $1,000-$5,000 (typically $2,700); an actual foundation repair, once cracking sets in, typically runs $5,000-$15,000 (around $10,000 typical) - roughly 4x the report.

Mississippi County's rank among Missouri counties

Among the 3,085 rated counties on this site, Mississippi County, MO ranks 111 most-constrained nationally, and 12 of 114 within Missouri. Mississippi County, MO is 412 square miles with a population of 11,750.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Winnebago County, IL and Talbot County, MD are worth a look for comparison.

How this reading is built, and its real limits · The warning signs of expansive-clay damage, explained

Elsewhere in Missouri

Every county in Missouri is on this site, including Harrison County, MO and St. Clair County, MO. The full underlying dataset is downloadable directly, one row per county.