Oliver County, ND Shrink-Swell Risk

Shrink-swell potential in Oliver County, ND

Moderate

Soil across 50% of Oliver County, ND comes back "Moderate" in USDA's shrink-swell data, averaging 3.12% linear extensibility. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What this number does and doesn't tell you

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

Oliver County: the real numbers

Oliver 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, Oliver County, ND ranks 1,110 most-constrained nationally, and 26 of 53 within North Dakota. The county spans 722 square miles, home to 1,882 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Cameron Parish, LA and Ouachita County, AR 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 Bowman County, ND and Stutsman County, ND. The full underlying dataset is downloadable directly, one row per county.