Benton County, OR Shrink-Swell Risk

Benton County's SSURGO shrink-swell reading

Moderate

In Benton County, OR, 55.9% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.88% linear extensibility on average. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

Before you rely on this for one address

Benton County's reading is an average across the whole county, not a promise about any one lot inside it. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Benton County will actually do.

Budgeting for Benton County, OR

Benton 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.

Benton County's rank among Oregon counties

Among the 3,085 rated counties on this site, Benton County, OR ranks 633 most-constrained nationally, and 1 of 36 within Oregon. Benton County covers 675 square miles and counts 98,899 residents.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Door County, WI and Putnam County, MO 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 Oregon

Every county in Oregon is on this site, including Grant County, OR and Malheur County, OR. The full underlying dataset is downloadable directly, one row per county.