French Drain Installation in Shreveport, LA

What a French Drain Actually Is

The name is French only by history — the technique was popularized by Henry French, a 19th-century Massachusetts farmer. In modern practice it's a gravel-filled trench with a perforated pipe at the bottom, wrapped in a geotextile fabric that keeps clay fines out of the aggregate. Surface water drops through the stone, enters the pipe through the perforations, and is carried by gravity to a legal discharge point — a rain garden, a dry well, a daylight outlet at the property line, or a stormwater tie-in permitted by the City of Shreveport or the relevant parish authority. In Shreveport soils, the geotextile choice matters. Cheap non-woven fabric silts up in one clay-heavy monsoon season. Woven monofilament or a high-flow non-woven is what a good crew specifies here.

Where French Drains Solve Real Shreveport Problems

Sloped backyards in Broadmoor and South Highlands where runoff sheets across neighboring lots. Low corners in Southern Trace, Provenance, and Long Lake Estates where rain pools and grass dies out. Wet foundations in older Highland and Fairfield Avenue homes where the original grading has settled toward the house. Chronic seep at the bottom of a slope in Ellerbe Woods or East Ridge. New-construction lots in Twelve Oaks and Norris Ferry where the builder-grade swale never worked. The recurring theme is water that has nowhere to go — and in NW Louisiana, that's most residential lots without an engineered drainage plan.

Materials That Belong in the Trench

A durable Shreveport French drain uses schedule-40 or SDR-35 rigid PVC with clean, symmetric perforations — not the flimsy corrugated black tubing that collapses under clay pressure and clogs within 2-3 seasons. The aggregate is #57 or #67 washed stone, not pea gravel, and never crusher run (fines kill the void space). The geotextile wraps the aggregate on all six sides — the 'burrito wrap' — with a generous overlap on top. Cleanouts at the top of the run and at every 90-degree bend let a crew jet the line clear years down the road.

Trench Depth and Slope in Caddo/Bossier Soils

For a yard drain, 18–24 inches deep is typical. For a foundation intercept — a curtain drain along the uphill side of the house — 30–48 inches, below the frost line and below the footing weep. Slope is non-negotiable: minimum 1% (that's 1 inch of drop per 8 feet of pipe), 2% is better. Level or reverse slopes are the number-one reason we get called to fix somebody else's failed French drain in Bossier City. A rotary laser or a good site level is used at trench-cut time, not a 4-foot bubble level after the fact.

The Discharge Point — Where the Water Goes

Louisiana law and City of Shreveport ordinance are both clear that you cannot dump concentrated stormwater onto a neighboring property or into the public right-of-way without permission. Options that work in this area: a rain garden or infiltration basin in a low corner of your own lot; a dry well (typically a buried perforated chamber) sized for your soil's infiltration rate; a daylight outlet with an animal grate at a legal downhill point; a permitted tie-in to a curb inlet or catch basin. The crew you hire should verify the discharge before they dig — not scramble for one on install day.

Permits, LDEQ, and Local Rules

For most single-family residential French drains that discharge onto the owner's own property, no permit is required. Once you tie into the public storm system, or once earthwork exceeds a certain threshold on a commercial lot, LDEQ stormwater rules and City of Shreveport engineering department review kick in. A licensed contractor knows which side of the line your project falls on and pulls the paperwork if needed. If you're building on a lot inside the SFHA (Special Flood Hazard Area) along Cross Bayou, Twelve Mile Bayou, or the Red River floodplain, additional floodplain-development review may apply.

Typical Install Timeline

A straight 40–60 foot residential French drain — one trench, one discharge — is a one-day job with a small crew of three and a mini-excavator. A wraparound curtain drain around three sides of a house, tied to a sump basin and a discharge line running 100+ feet to the street, is a 2–3 day job and needs the utility locates back before anyone digs. Louisiana One-Call (LA811) is legally required and typically takes 2 full working days to mark.

What a Bad French Drain Looks Like — And Why We Keep Fixing Them

We get a steady stream of callbacks in Shreveport from homeowners whose 'French drain' was a shallow trench of pea gravel with a landscape-fabric wrap and a corrugated pipe that daylights into their own flowerbed. That's not a drainage system, that's a decoration. Common failure modes on those installs: (1) fabric silts up in year one, water sheets over the top; (2) corrugated pipe pancakes under clay pressure; (3) no slope, standing water inside the pipe; (4) 'discharge' is actually just re-releasing the water back onto the same lot. The re-do costs more than the original done right.

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