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Drainage Correction & Bioswales in the Texas Hill Country

Hill Country runoff problems solved at the source — not patched at the foundation.

What it is

Drainage Solutions — built right.

Most Hill Country properties have a drainage problem they don't realize until water reaches the foundation, the patio cracks, or fire ants surge after every storm. Drainage correction is the most under-quoted, under-explained part of residential landscaping. We engineer drainage as a system — read where the water comes from, where it sits, where it needs to go, and how to move it there without dumping the problem on the neighbor.

Hill Country Relevance

Local conditions.

Caliche soil drains slowly, runoff routes around it. After a 2-3 inch rain, problem zones reveal themselves: standing water by the foundation, water-stressed beds, mosquito-pressure spots, and fresh fire-ant mounds on the slope changes. We walk after rain events on purpose — that's when the property tells the truth.

Materials & Process

How we build it.

  1. Post-storm or post-rain walk to map runoff patterns and standing-water zones.
  2. Drainage plan — french drain placement, channel drain locations, regrade routing, downspout integration, optional bioswale for ecological treatment.
  3. Excavation to required depth (typically 18-30" for french drain, 4-8" for channel).
  4. Geotextile-wrapped gravel envelope around perforated pipe.
  5. Bioswale option: regraded swale + check dams + native filter plantings + river rock.
  6. Test with a hose — confirm flow direction and capacity before backfill.
  7. Restore surface — sod, mulch bed, or finish hardscape.

Common questions.

How do I know if I have a drainage problem?

Five signs: standing water 24+ hours after rain, foundation cracks getting wider, mulch washing out of beds, mosquito surges every July-October, or recurring fire-ant mounds in the same spots after every rain. Any one of those is usually a drainage symptom first.

What's a bioswale and do I need one?

A bioswale is a shallow vegetated channel that slows, filters, and absorbs runoff using native plants. It's drainage that doubles as habitat. You'd want one if you have chronic runoff coming through a defined path, slope erosion, or you want drainage that looks like a feature instead of a hidden patch.

Will a french drain solve my foundation water issue?

Often yes — but only if the slope, depth, and outlet are engineered properly. We've replaced several french drains installed by other companies that ran uphill, dumped into clay, or had no outlet at all. The engineering matters more than the materials.

What does drainage correction cost in Bulverde?

French drain runs typically start at $42 per linear foot, channel drains $32, bioswale systems $6,000+. Every property is walked and quoted in writing — drainage is one of the projects where guessing on price always underestimates.

Ready to walk the property?

Sherman, Dorian, or Derrick will be on-site within a few days. Free site walk, written quote, locked pricing for 14 days. 10% military & first-responder discount applies to every project.

Build a Proposal Call (210) 383-1807
Available across the Hill Country

We provide this service in every town we serve.

From the Knowledge Hub

Why is my yard flooding — and how do I fix it? → How much does a French drain cost in the Hill Country? →