Marion County, OH Shrink-Swell Risk

Shrink-swell potential in Marion County, OH

Moderate

Soil across 90.8% of Marion County, OH comes back "Moderate" in USDA's shrink-swell data, averaging 4.51% 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 Marion County, OH - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Marion County: the real numbers

Marion 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 Marion County, OH compares

Among the 3,085 rated counties on this site, Marion County, OH ranks 384 most-constrained nationally, and 6 of 88 within Ohio. Marion County covers 404 square miles and counts 64,976 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Stevens County, WA and Marion County, KY 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 Ohio

Every county in Ohio is on this site, including Hancock County, OH and Licking County, OH. The full underlying dataset is downloadable directly, one row per county.