Clarke County, AL Shrink-Swell Risk

Shrink-swell potential in Clarke County, AL

Low

Soil across 73.2% of Clarke County, AL comes back "Low" in USDA's shrink-swell data, averaging 2.47% 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 this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Clarke County, AL - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Clarke County: the real numbers

Clarke 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.

Clarke County's rank among Alabama counties

Among the 3,085 rated counties on this site, Clarke County, AL ranks 1,587 most-constrained nationally, and 18 of 67 within Alabama. Clarke County covers 1,238 square miles and counts 22,142 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Bamberg County, SC and Owyhee County, ID 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 Alabama

Every county in Alabama is on this site, including Barbour County, AL and Elmore County, AL. The full underlying dataset is downloadable directly, one row per county.