Ziebach County, SD Shrink-Swell Risk

Ziebach County's SSURGO shrink-swell reading

High

In Ziebach County, SD, 28.3% of the surveyed soil carries a "High" shrink-swell rating, 7.13% linear extensibility on average. Ground like this needs active moisture control to keep a conventional foundation from cracking - it's not automatic either way.

Before you rely on this for one address

Ziebach County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Ziebach County.

Budgeting for Ziebach County, SD

Given Ziebach County's rating, spending a few thousand now is the way to avoid spending tens of thousands later. A geotechnical report runs $1,000-$5,000 (typically $2,700); an actual foundation repair, once cracking sets in, typically runs $5,000-$15,000 (around $10,000 typical) - roughly 4x the report.

Ziebach County's rank among South Dakota counties

Among the 3,085 rated counties on this site, Ziebach County, SD ranks 74 most-constrained nationally, and 8 of 66 within South Dakota. The county spans 1,961 square miles, home to 2,418 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Evans County, GA and Crawford County, IL are worth a look for comparison.

How this reading is built, and its real limits · The warning signs of expansive-clay damage, explained

Elsewhere in South Dakota

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