Fentress County, TN Shrink-Swell Risk
Fentress County, TN's soil, for shrink-swell risk
Low
Fentress County, TN: USDA's soil survey rates 83.6% of the county "Low" for shrink-swell potential (1.63% linear extensibility). That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.
What Fentress County's reading doesn't cover
Two lots a mile apart in Fentress County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).
What it costs to find out, versus to ignore it
With Fentress County, TN rating "Low", 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.
How Fentress County, TN compares
Nationally, Fentress County, TN is the 2,352-most-constrained of 3,085 rated counties for shrink-swell soil. Within Tennessee alone it ranks 68 of 95. Fentress County covers 499 square miles and counts 20,129 residents.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Audrain County, MO and Upshur County, TX 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 Tennessee
Every county in Tennessee is on this site, including Morgan County, TN and Chester County, TN. The full underlying dataset is downloadable directly, one row per county.