Sierra County, CA Shrink-Swell Risk

Sierra County, CA's soil, for shrink-swell risk

Low

Sierra County, CA: USDA's soil survey rates 89.4% of the county "Low" for shrink-swell potential (1.83% linear extensibility). That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

What Sierra County's reading doesn't cover

Two lots a mile apart in Sierra County can carry different soil, even though they share one countywide reading. 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 Sierra County.

What it costs to find out, versus to ignore it

With Sierra County, CA 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 Sierra County, CA compares

Nationally, Sierra County, CA is the 2,141-most-constrained of 3,085 rated counties for shrink-swell soil. Within California alone it ranks 54 of 58. Sierra County covers 953 square miles and counts 3,113 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Pope County, MN and Monroe County, MS 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 California

Every county in California is on this site, including Glenn County, CA and San Mateo County, CA. The full underlying dataset is downloadable directly, one row per county.