Water is what makes retaining walls fail and what washes soil off Panhandle slopes. French drains, grading, and proper backfill fix both. Here is what drainage costs in the Amarillo area, why it matters so much on our clay soils, and how it protects your wall.
Drainage cost depends on the scope. A French drain commonly runs about $1,000 to $4,000 depending on length, depth, and where it outlets, while the wall drainage behind a new retaining wall — gravel backfill and drain pipe — is built into that wall's price. Regrading a yard and larger erosion-control work depend on how much soil and area are involved. What drives the number:
Request a quote and describe where the water is going wrong.
Most retaining wall failures come down to one thing: water pressure. When rain saturates the soil behind a wall, hydrostatic pressure builds and pushes the wall outward — and over Amarillo's expansive clay, that pressure builds fast after a heavy Panhandle storm. Gravel backfill, a perforated drain pipe, and grading that carries water away relieve that pressure so the wall stays put. It is the least visible part of a wall and the most important, which is why we build it into every wall and why we are often called to add it during a wall repair.
Between dry Panhandle wind and sudden hard rain, unprotected slopes lose soil quickly. Erosion control slows and redirects water: proper grading, a retaining wall or terraces to hold the grade, gravel or riprap in runoff channels, and drains that carry water to a safe outlet. Pairing a wall with real drainage is the most durable fix for an eroding yard, and it keeps landscaping and patios from washing out.
Commonly about $1,000 to $4,000 depending on length, depth, and outlet. Wall drainage in a new wall is part of that wall's cost.
Water saturates the soil behind the wall and builds pressure that pushes it out — fast over Amarillo clay. Backfill, drain pipe, and grading relieve it.
Grade to redirect water, hold the slope with a wall or terraces, and drain runoff to a safe outlet. Combining a wall with drainage lasts longest.
Often yes. Retrofitting backfill drainage or a French drain can relieve pressure on a wall that is starting to lean.
Visit the full FAQ page for more.
Walls with drainage built in.
Fix walls failing from water pressure.
Engineered walls for heavy loads.
You can also review block & boulder walls, hardscaping & patios, and the areas we serve.