Seminole County, OK Shrink-Swell Risk

What Seminole County, OK's soil means for a foundation

Low

USDA's SSURGO data puts Seminole County, OK's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.93% across 52.9% of the county's surveyed land. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

This is a county figure, not a lot figure

USDA's survey covers the whole of Seminole County, OK at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Seminole County will actually do.

Report cost vs. repair cost

With Seminole County, OK rating "Low", 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.

Seminole County's rank among Oklahoma counties

Nationally, Seminole County, OK is the 1,243-most-constrained of 3,085 rated counties for shrink-swell soil. Within Oklahoma alone it ranks 54 of 77. The county spans 633 square miles, home to 23,351 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. New York County, NY and Clay County, MN 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 Oklahoma

Every county in Oklahoma is on this site, including Jackson County, OK and Choctaw County, OK. The full underlying dataset is downloadable directly, one row per county.