Spencer County, KY Shrink-Swell Risk
What Spencer County, KY's soil means for a foundation
Moderate
USDA's SSURGO data puts Spencer County, KY's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.54% across 54.1% of the county's surveyed land. 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.
This is a county figure, not a lot figure
USDA's survey covers the whole of Spencer County, KY at once, not any single address. 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 Spencer County.
Report cost vs. repair cost
With Spencer County, KY rating "Moderate", 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.
Where this sits nationally
Nationally, Spencer County, KY is the 816-most-constrained of 3,085 rated counties for shrink-swell soil. Within Kentucky alone it ranks 25 of 120. The county spans 187 square miles, home to 20,823 people.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Taylor County, KY and King County, WA 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 Kentucky
Every county in Kentucky is on this site, including Mason County, KY and Menifee County, KY. The full underlying dataset is downloadable directly, one row per county.