Fall River County, SD Shrink-Swell Risk

Shrink-swell potential in Fall River County, SD

Moderate

Soil across 34.3% of Fall River County, SD comes back "Moderate" in USDA's shrink-swell data, averaging 5.92% linear extensibility. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Fall River County, SD - 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 Fall River County.

Fall River County: the real numbers

Fall River 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.

How Fall River County, SD compares

Among the 3,085 rated counties on this site, Fall River County, SD ranks 140 most-constrained nationally, and 12 of 66 within South Dakota. The county spans 1,740 square miles, home to 7,359 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Oktibbeha County, MS and Greenbrier County, WV 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 South Dakota

Every county in South Dakota is on this site, including Haakon County, SD and Hanson County, SD. The full underlying dataset is downloadable directly, one row per county.