Logan County, OK Shrink-Swell Risk

Shrink-swell potential in Logan County, OK

Moderate

Soil across 64.4% of Logan County, OK comes back "Moderate" in USDA's shrink-swell data, averaging 3.06% linear extensibility. 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.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Logan 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 Logan County will actually do.

Logan County: the real numbers

Logan 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.

Logan County's rank among Oklahoma counties

Among the 3,085 rated counties on this site, Logan County, OK ranks 1,146 most-constrained nationally, and 47 of 77 within Oklahoma. The county spans 744 square miles, home to 53,860 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Burlington County, NJ and Clark County, IN 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 Bryan County, OK and Canadian County, OK. The full underlying dataset is downloadable directly, one row per county.