Lumpkin County, GA Shrink-Swell Risk
Lumpkin County, GA's soil, for shrink-swell risk
Low
Lumpkin County, GA: USDA's soil survey rates 98.6% of the county "Low" for shrink-swell potential (1.49% 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 Lumpkin County's reading doesn't cover
Two lots a mile apart in Lumpkin County can carry different soil, even though they share one countywide reading. 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 Lumpkin County.
What it costs to find out, versus to ignore it
With Lumpkin County, GA 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.
Lumpkin County's rank among Georgia counties
Nationally, Lumpkin County, GA is the 2,521-most-constrained of 3,085 rated counties for shrink-swell soil. Within Georgia alone it ranks 89 of 159. Lumpkin County, GA is 281 square miles with a population of 36,016.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Bear Lake County, ID and Bastrop 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 Georgia
Every county in Georgia is on this site, including Appling County, GA and Walker County, GA. The full underlying dataset is downloadable directly, one row per county.