Ottawa County, MI Shrink-Swell Risk

Ottawa County, MI's soil, for shrink-swell risk

Low

Ottawa County, MI: USDA's soil survey rates 73.5% of the county "Low" for shrink-swell potential (1.55% 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 Ottawa County's reading doesn't cover

Two lots a mile apart in Ottawa County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

What it costs to find out, versus to ignore it

With Ottawa County, MI rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. 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 Ottawa County, MI compares

Nationally, Ottawa County, MI is the 2,441-most-constrained of 3,085 rated counties for shrink-swell soil. Within Michigan alone it ranks 32 of 83. Ottawa County, MI is 564 square miles with a population of 306,235.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Okfuskee County, OK and Jefferson County, TX 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

More of Michigan

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