Orangeburg County, SC Shrink-Swell Risk

Orangeburg County, SC's soil, for shrink-swell risk

Low

Orangeburg County, SC: USDA's soil survey rates 91.9% of the county "Low" for shrink-swell potential (1.54% 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 Orangeburg County's reading doesn't cover

Two lots a mile apart in Orangeburg 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 Orangeburg County.

What it costs to find out, versus to ignore it

With Orangeburg County, SC 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.

Orangeburg County's rank among South Carolina counties

Nationally, Orangeburg County, SC is the 2,449-most-constrained of 3,085 rated counties for shrink-swell soil. Within South Carolina alone it ranks 35 of 46. Orangeburg County, SC is 1,106 square miles with a population of 83,129.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Allamakee County, IA and Sussex County, NJ 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 South Carolina

Every county in South Carolina is on this site, including Calhoun County, SC and Allendale County, SC. The full underlying dataset is downloadable directly, one row per county.