Grant County, NM Shrink-Swell Risk

Shrink-swell potential in Grant County, NM

Moderate

Soil across 44.7% of Grant County, NM comes back "Moderate" in USDA's shrink-swell data, averaging 4.55% 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 Grant County, NM - 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 Grant County.

Grant County: the real numbers

Grant 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.

Grant County's rank among New Mexico counties

Among the 3,085 rated counties on this site, Grant County, NM ranks 377 most-constrained nationally, and 1 of 32 within New Mexico. Grant County, NM is 3,961 square miles with a population of 27,541.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Buffalo County, WI and Jasper 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 New Mexico

Every county in New Mexico is on this site, including De Baca County, NM and Curry County, NM. The full underlying dataset is downloadable directly, one row per county.