Allen County, IN Shrink-Swell Risk

Shrink-swell potential in Allen County, IN

Moderate

Soil across 85.4% of Allen County, IN comes back "Moderate" in USDA's shrink-swell data, averaging 4.33% 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 Allen County, IN - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Allen County will actually do.

Allen County: the real numbers

Allen 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.

Allen County's rank among Indiana counties

Among the 3,085 rated counties on this site, Allen County, IN ranks 427 most-constrained nationally, and 7 of 90 within Indiana. Allen County covers 657 square miles and counts 399,295 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Pike County, AL and Paulding County, OH 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 Indiana

Every county in Indiana is on this site, including Washington County, IN and Vigo County, IN. The full underlying dataset is downloadable directly, one row per county.