Wylie sits in south-central Collin County, approximately 26 miles northeast of downtown Dallas, nestled between Lake Lavon to the north and Lake Ray Hubbard to the south. This growing community of over 60,000 residents offers small-town charm with easy access to major employment centers—and plenty of backyard pools to enjoy the Texas heat.

But Wylie’s location in the heart of the Blackland Prairie means pool owners face unique challenges. The region is underlain by Upper Cretaceous marine chalks, limestone, and shale, which give rise to the characteristic black, heavy clay soils known throughout North Texas. This clay-rich soil can exert up to 15,000 pounds per square foot of pressure on structures as it expands and contracts with moisture changes. FEMA estimates this type of soil movement causes over $7 billion in structural damage annually across the country.

Blackland Prairie soils are classified as “cracking clays” because of the large, deep cracks that form during dry weather—cracks that can reach 4 inches wide and 6 feet deep. When rains return, the soil rapidly absorbs water and swells dramatically. This constant cycle of expansion and contraction stresses pool shells, plumbing connections, and equipment—creating the leaks that drain both your pool and your wallet.

The clay content in this region can exceed 60%, with a plasticity rating between 14 and 54, making it one of the most challenging soils to build on in the country. Your pool is fighting this soil movement every single day.