Aurora County, SD Shrink-Swell Risk

Aurora County's SSURGO shrink-swell reading

Moderate

In Aurora County, SD, 74.1% of the surveyed soil carries a "Moderate" shrink-swell rating, 4.15% linear extensibility on average. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

Before you rely on this for one address

Aurora County's reading is an average across the whole county, not a promise about any one lot inside it. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Budgeting for Aurora County, SD

Aurora 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 Aurora County, SD compares

Among the 3,085 rated counties on this site, Aurora County, SD ranks 505 most-constrained nationally, and 31 of 66 within South Dakota. Aurora County covers 708 square miles and counts 2,752 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Warren County, NC and Marshall County, OK 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 Mellette County, SD and Brule County, SD. The full underlying dataset is downloadable directly, one row per county.