Franklin Parish, LA Shrink-Swell Risk

Shrink-swell potential in Franklin Parish, LA

Moderate

Soil across 50.7% of Franklin Parish, LA comes back "Moderate" in USDA's shrink-swell data, averaging 5.16% 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 Franklin Parish, LA - 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).

Franklin Parish: the real numbers

Franklin Parish'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.

Franklin Parish's rank among Louisiana counties

Among the 3,085 rated counties on this site, Franklin Parish, LA ranks 262 most-constrained nationally, and 32 of 64 within Louisiana. The county spans 624 square miles, home to 19,107 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Blaine County, MT and Spalding 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 Louisiana

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