Unicoi County, TN Shrink-Swell Risk

Shrink-swell potential in Unicoi County, TN

Low

Soil across 97.9% of Unicoi County, TN comes back "Low" in USDA's shrink-swell data, averaging 1.34% linear extensibility. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Unicoi County, TN - 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 Unicoi County.

Unicoi County: the real numbers

Unicoi 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 Unicoi County, TN compares

Among the 3,085 rated counties on this site, Unicoi County, TN ranks 2,672 most-constrained nationally, and 87 of 95 within Tennessee. Unicoi County covers 186 square miles and counts 17,872 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Dare County, NC and Lane County, OR 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 Tennessee

Every county in Tennessee is on this site, including McNairy County, TN and Dickson County, TN. The full underlying dataset is downloadable directly, one row per county.