Red River Parish, LA Shrink-Swell Risk

What Red River Parish, LA's soil means for a foundation

Moderate

USDA's SSURGO data puts Red River Parish, LA's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 4.24% across 63.8% of the county's surveyed land. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

This is a county figure, not a lot figure

USDA's survey covers the whole of Red River Parish, LA at once, not any single address. 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 Red River Parish.

Report cost vs. repair cost

With Red River Parish, LA rating "Moderate", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. 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.

Red River Parish's rank among Louisiana counties

Nationally, Red River Parish, LA is the 459-most-constrained of 3,085 rated counties for shrink-swell soil. Within Louisiana alone it ranks 40 of 64. The county spans 389 square miles, home to 7,238 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Berkshire County, MA and Loudon County, TN 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

More of Louisiana

Every county in Louisiana is on this site, including Sabine Parish, LA and St. Tammany Parish, LA. The full underlying dataset is downloadable directly, one row per county.