Adair County, KY Shrink-Swell Risk
Shrink-swell potential in Adair County, KY
Low
Soil across 70.2% of Adair County, KY comes back "Low" in USDA's shrink-swell data, averaging 2.47% linear extensibility. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Adair County, KY - 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).
Adair County: the real numbers
Adair 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, Adair County, KY ranks 1,588 most-constrained nationally, and 59 of 120 within Kentucky. Adair County covers 405 square miles and counts 19,239 residents.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Montgomery County, IL and George County, MS 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 Kentucky
Every county in Kentucky is on this site, including Knott County, KY and Floyd County, KY. The full underlying dataset is downloadable directly, one row per county.