Union County, MS Shrink-Swell Risk

Shrink-swell potential in Union County, MS

Low

Soil across 86.2% of Union County, MS comes back "Low" in USDA's shrink-swell data, averaging 2.11% 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 Union County, MS - 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 Union County will actually do.

Union County: the real numbers

Union 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.

How Union County, MS compares

Among the 3,085 rated counties on this site, Union County, MS ranks 1,883 most-constrained nationally, and 48 of 82 within Mississippi. The county spans 416 square miles, home to 28,363 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Trimble County, KY and Mineral County, NV 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 Mississippi

Every county in Mississippi is on this site, including Tunica County, MS and Lawrence County, MS. The full underlying dataset is downloadable directly, one row per county.