Miller County, MO Shrink-Swell Risk
Shrink-swell potential in Miller County, MO
Low
Soil across 66.4% of Miller County, MO comes back "Low" in USDA's shrink-swell data, averaging 2.95% linear extensibility. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Miller 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).
Miller County: the real numbers
Miller 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, Miller County, MO ranks 1,231 most-constrained nationally, and 80 of 114 within Missouri. Miller County covers 593 square miles and counts 25,668 residents.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Richland County, WI and Scotland County, MO 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 Pemiscot County, MO and Pike County, MO. The full underlying dataset is downloadable directly, one row per county.