Logan County, WV Shrink-Swell Risk
Logan County, WV's soil, for shrink-swell risk
Low
Logan County, WV: USDA's soil survey rates 100% of the county "Low" for shrink-swell potential (0.68% 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 Logan County's reading doesn't cover
Two lots a mile apart in Logan 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 Logan County, WV 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 Logan County, WV compares
Nationally, Logan County, WV is the 3,020-most-constrained of 3,085 rated counties for shrink-swell soil. Within West Virginia alone it ranks 54 of 55. Logan County covers 453 square miles and counts 30,560 residents.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Effingham County, GA and Boone County, IA 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 West Virginia
Every county in West Virginia is on this site, including Webster County, WV and Pocahontas County, WV. The full underlying dataset is downloadable directly, one row per county.