Kershaw County, SC Shrink-Swell Risk

Shrink-swell potential in Kershaw County, SC

Low

Soil across 97.3% of Kershaw County, SC comes back "Low" in USDA's shrink-swell data, averaging 1.2% 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 Kershaw County, SC - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Kershaw County will actually do.

Kershaw County: the real numbers

Kershaw 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.

Where this sits nationally

Among the 3,085 rated counties on this site, Kershaw County, SC ranks 2,766 most-constrained nationally, and 43 of 46 within South Carolina. The county spans 727 square miles, home to 71,698 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Richland County, IL and Chippewa County, WI 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 South Carolina

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