Alpena County, MI Shrink-Swell Risk

Shrink-swell potential in Alpena County, MI

Low

Soil across 89.3% of Alpena County, MI comes back "Low" in USDA's shrink-swell data, averaging 2.11% 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 Alpena County, MI - 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 Alpena County.

Alpena County: the real numbers

Alpena 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, Alpena County, MI ranks 1,882 most-constrained nationally, and 11 of 83 within Michigan. The county spans 572 square miles, home to 28,903 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Brantley County, GA and Seneca County, NY 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 Cass County, MI and Van Buren County, MI. The full underlying dataset is downloadable directly, one row per county.