Copper River Census Area, AK Shrink-Swell Risk
Shrink-swell potential in Copper River Census Area, AK
Low
Soil across 69.7% of Copper River Census Area, AK comes back "Low" in USDA's shrink-swell data, averaging 1.72% 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 this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Copper River Census Area, AK - 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 Copper River Census Area.
Copper River Census Area: the real numbers
Copper River Census Area'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.
How Copper River Census Area, AK compares
Among the 3,085 rated counties on this site, Copper River Census Area, AK ranks 2,265 most-constrained nationally, and 1 of 11 within Alaska. Copper River Census Area covers 24,647 square miles and counts 2,631 residents.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Atoka County, OK and Alpine County, CA 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 Alaska
Every county in Alaska is on this site, including Southeast Fairbanks Census Area, AK and Denali Borough, AK. The full underlying dataset is downloadable directly, one row per county.