Garvin County, OK Shrink-Swell Risk

Shrink-swell potential in Garvin County, OK

Moderate

Soil across 50.4% of Garvin County, OK comes back "Moderate" in USDA's shrink-swell data, averaging 4.03% linear extensibility. A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Garvin County, OK - 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).

Garvin County: the real numbers

Garvin 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.

Garvin County's rank among Oklahoma counties

Among the 3,085 rated counties on this site, Garvin County, OK ranks 546 most-constrained nationally, and 22 of 77 within Oklahoma. The county spans 802 square miles, home to 26,149 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Ouachita County, AR and Christian County, IL 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 Oklahoma

Every county in Oklahoma is on this site, including Okfuskee County, OK and Adair County, OK. The full underlying dataset is downloadable directly, one row per county.