Roger Mills County, OK Shrink-Swell Risk
Shrink-swell potential in Roger Mills County, OK
Low
Soil across 94.4% of Roger Mills County, OK comes back "Low" in USDA's shrink-swell data, averaging 1.39% linear extensibility. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Roger Mills County, OK - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Roger Mills County will actually do.
Roger Mills County: the real numbers
Roger Mills 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, Roger Mills County, OK ranks 2,624 most-constrained nationally, and 76 of 77 within Oklahoma. The county spans 1,141 square miles, home to 3,304 people.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Obion County, TN and San Francisco County, CA 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 Oklahoma
Every county in Oklahoma is on this site, including Mayes County, OK and Bryan County, OK. The full underlying dataset is downloadable directly, one row per county.