Possum Kingdom Lake has 310 miles of shoreline, and a lot of it is held together by seawalls in various states of losing the fight. If you own waterfront at PK, sooner or later you'll deal with one — building it, repairing it, or replacing the one that came with the house. Here's the straight version of what matters.
Boat wake, wave action, and rain runoff work at your bank every day. PK's slopes send water toward the lake fast, and the wake from a busy summer weekend hits the shore for hours at a time. Left alone, erosion undercuts the bank and starts taking lawn, trees, and eventually whatever's built above it.
The same reason retaining walls fail: trapped water. A seawall gets pushed from two sides — the lake in front, and rain-saturated ground behind. Without gravel backfill, drainage, and weep paths, hydrostatic pressure builds behind the wall until it cracks, tips, or the ground behind it sinkholes. The drainage is invisible once the wall is built, which is exactly why cut-rate crews skip it.
The second killer is undermining — wake scouring out the toe of the wall until it settles and cracks. Proper footing and toe protection, built for PK's rock shoreline, prevent it.
The Brazos River Authority governs Possum Kingdom Lake, and much of the shoreline sits on BRA lease land. Shoreline work generally involves BRA requirements — and a contractor who's never dealt with them will learn on your project. We've handled BRA processes since 2006; it's built into how we scope every shoreline job.
PK's water level fluctuates several feet. When it drops, shoreline that's normally underwater is exposed — which is the efficient window to build and repair seawalls. We watch lake levels and schedule shoreline work into those windows. If your wall needs attention, the time to get on the schedule is before the water drops, not after.
Length, height, material, access, and rock drive the number — a short repair and a full replacement on a steep, gated lot are entirely different budgets. Be wary of any price quoted without someone standing on your shoreline. We quote in writing after a free walkthrough, and financing is available.
Caught early — cracks, minor undermining, a sinkhole forming behind the wall — many walls are repairable. Past a point, repair is throwing money at a wall that's already lost. We'll tell you honestly which side of the line yours is on, in writing.
Walk it after the next big weekend and look for: new cracks, the wall leaning off vertical, low spots or holes opening behind it, and dirt in the water at the wall's base. Any of those means it's time for an assessment — free, and honest. Call or text (325) 627-8984.