Polk County, NE Shrink-Swell Risk

Shrink-swell potential in Polk County, NE

Moderate

Soil across 63.1% of Polk County, NE comes back "Moderate" in USDA's shrink-swell data, averaging 4.28% linear extensibility. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Polk County, NE - 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 Polk County.

Polk County: the real numbers

Polk 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 Polk County, NE compares

Among the 3,085 rated counties on this site, Polk County, NE ranks 448 most-constrained nationally, and 23 of 93 within Nebraska. Polk County covers 439 square miles and counts 5,269 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Richland County, SC and Taney County, MO 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 Nebraska

Every county in Nebraska is on this site, including Otoe County, NE and Greeley County, NE. The full underlying dataset is downloadable directly, one row per county.