Jackson County, OK Shrink-Swell Risk
Shrink-swell potential in Jackson County, OK
Moderate
Soil across 43.5% of Jackson County, OK comes back "Moderate" in USDA's shrink-swell data, averaging 4.02% linear extensibility. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Jackson County, OK - never a reading for one specific parcel. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Jackson County.
Jackson County: the real numbers
Jackson 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.
How Jackson County, OK compares
Among the 3,085 rated counties on this site, Jackson County, OK ranks 554 most-constrained nationally, and 23 of 77 within Oklahoma. Jackson County, OK is 803 square miles with a population of 24,541.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Lincoln County, KY and Clearwater County, ID 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 Tillman County, OK and Noble County, OK. The full underlying dataset is downloadable directly, one row per county.