Tillamook County, OR Shrink-Swell Risk

Tillamook County's SSURGO shrink-swell reading

Low

In Tillamook County, OR, 87.2% of the surveyed soil carries a "Low" shrink-swell rating, 1.81% linear extensibility on average. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

Before you rely on this for one address

Tillamook County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Tillamook County.

Budgeting for Tillamook County, OR

Tillamook 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.

Tillamook County's rank among Oregon counties

Among the 3,085 rated counties on this site, Tillamook County, OR ranks 2,161 most-constrained nationally, and 30 of 36 within Oregon. Tillamook County covers 1,103 square miles and counts 27,264 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Cheyenne County, CO and Juab County, UT 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 Crook County, OR and Linn County, OR. The full underlying dataset is downloadable directly, one row per county.