Pacific County, WA Shrink-Swell Risk

Shrink-swell potential in Pacific County, WA

Low

Soil across 81.1% of Pacific County, WA comes back "Low" in USDA's shrink-swell data, averaging 2.15% linear extensibility. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

What this number does and doesn't tell you

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

Pacific County: the real numbers

Pacific 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.

Pacific County's rank among Washington counties

Among the 3,085 rated counties on this site, Pacific County, WA ranks 1,845 most-constrained nationally, and 9 of 39 within Washington. Pacific County, WA is 933 square miles with a population of 24,245.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Dickey County, ND and York County, ME 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 Washington

Every county in Washington is on this site, including Whatcom County, WA and Wahkiakum County, WA. The full underlying dataset is downloadable directly, one row per county.