Tulsa County, OK Shrink-Swell Risk

Shrink-swell potential in Tulsa County, OK

Moderate

Soil across 62.5% of Tulsa County, OK comes back "Moderate" in USDA's shrink-swell data, averaging 3.83% linear extensibility. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What this number does and doesn't tell you

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

Tulsa County: the real numbers

Tulsa 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 Tulsa County, OK compares

Among the 3,085 rated counties on this site, Tulsa County, OK ranks 657 most-constrained nationally, and 28 of 77 within Oklahoma. Tulsa County, OK is 570 square miles with a population of 693,514.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Orleans Parish, LA and Putnam County, GA 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 Grant County, OK and Blaine County, OK. The full underlying dataset is downloadable directly, one row per county.