Ontonagon County, MI Shrink-Swell Risk

Ontonagon County's SSURGO shrink-swell reading

Low

In Ontonagon County, MI, 76.4% of the surveyed soil carries a "Low" shrink-swell rating, 2.39% linear extensibility on average. 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.

Before you rely on this for one address

Ontonagon County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Ontonagon County.

Budgeting for Ontonagon County, MI

Ontonagon 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 Ontonagon County, MI compares

Among the 3,085 rated counties on this site, Ontonagon County, MI ranks 1,656 most-constrained nationally, and 6 of 83 within Michigan. Ontonagon County, MI is 1,311 square miles with a population of 5,824.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Hamilton County, FL and Brookings County, SD 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 Lenawee County, MI and Huron County, MI. The full underlying dataset is downloadable directly, one row per county.