Rock County, WI Shrink-Swell Risk

Shrink-swell potential in Rock County, WI

Low

Soil across 59% of Rock County, WI comes back "Low" in USDA's shrink-swell data, averaging 2.85% 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 Rock County, WI - never a reading for one specific parcel. 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 Rock County.

Rock County: the real numbers

Rock 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 Rock County, WI compares

Among the 3,085 rated counties on this site, Rock County, WI ranks 1,309 most-constrained nationally, and 18 of 72 within Wisconsin. The county spans 718 square miles, home to 165,461 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Schuyler County, NY and Loudon County, TN 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 Wisconsin

Every county in Wisconsin is on this site, including Dodge County, WI and Green Lake County, WI. The full underlying dataset is downloadable directly, one row per county.