Keweenaw County, MI Shrink-Swell Risk

Shrink-swell potential in Keweenaw County, MI

Low

Soil across 100% of Keweenaw County, MI comes back "Low" in USDA's shrink-swell data, averaging 0.36% 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 this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Keweenaw County, MI - 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).

Keweenaw County: the real numbers

Keweenaw 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 Keweenaw County, MI compares

Among the 3,085 rated counties on this site, Keweenaw County, MI ranks 3,063 most-constrained nationally, and 79 of 83 within Michigan. Keweenaw County covers 540 square miles and counts 2,161 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Rapides Parish, LA and Sequoyah County, OK 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 Michigan

Every county in Michigan is on this site, including St. Clair County, MI and Kent County, MI. The full underlying dataset is downloadable directly, one row per county.