Umatilla County, OR Shrink-Swell Risk

What Umatilla County, OR's soil means for a foundation

Low

USDA's SSURGO data puts Umatilla County, OR's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.98% across 83.2% of the county's surveyed land. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

This is a county figure, not a lot figure

USDA's survey covers the whole of Umatilla County, OR at once, not any single address. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Report cost vs. repair cost

With Umatilla County, OR 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 Umatilla County, OR compares

Nationally, Umatilla County, OR is the 2,000-most-constrained of 3,085 rated counties for shrink-swell soil. Within Oregon alone it ranks 27 of 36. Umatilla County covers 3,215 square miles and counts 80,491 residents.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Livingston County, IL and Clearwater County, MN 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 Oregon

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