Dunn County, ND Shrink-Swell Risk

Shrink-swell potential in Dunn County, ND

Moderate

Soil across 58% of Dunn County, ND comes back "Moderate" in USDA's shrink-swell data, averaging 3.21% linear extensibility. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

What this number does and doesn't tell you

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

Dunn County: the real numbers

Dunn 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 Dunn County, ND compares

Among the 3,085 rated counties on this site, Dunn County, ND ranks 1,042 most-constrained nationally, and 20 of 53 within North Dakota. The county spans 2,008 square miles, home to 4,031 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Warren County, MO and Middlesex County, VA 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 North Dakota

Every county in North Dakota is on this site, including McHenry County, ND and Golden Valley County, ND. The full underlying dataset is downloadable directly, one row per county.