Drainage and grading
Getting rainwater away from the slab so the clay stops swinging
Christoval lies south of San Angelo along the South Concho River, in Tom Green County.
Christoval sits south of San Angelo along the South Concho River. River-adjacent land is its own situation for foundations, and it is worth being specific about why, because the intuition most people have about it is only half right.
The instinct is that near a river means wetter ground, and therefore fine. What actually determines whether a foundation moves on clay is not how wet the soil is but how much its wetness changes, and how much that change varies from one part of the house to another. Ground near a watercourse can hold moisture very unevenly across a single property — different depths, different drainage, different exposure — and that unevenness is exactly the condition that lifts one part of a foundation while another part settles away from it.
So the evaluation on a site like this pays particular attention to where water actually goes and sits, because on river-adjacent land the story of the floor and the story of the water are usually the same story. The floor elevations show the shape of the movement, and the site walk normally shows the reason for it.
The way to settle any of this is measurement rather than opinion. A free evaluation takes relative floor elevations across the house, records where and how the cracking runs, and looks at what the drainage and any nearby trees are doing to the soil — and you get that in writing. Quite often the answer is that the movement is old, stable and needs nothing, which is a perfectly good outcome and costs you nothing to establish.
Where work is needed, the plan should name every pier and its location before anything begins. Texas issues no foundation repair license, so a written scope, insurance confirmed with the insurer, an engineer's involvement, and a warranty in writing are the four things worth asking of anyone. How to judge a foundation contractor in Texas →
Ground and climate facts on this page come from the USDA Natural Resources Conservation Service Official Soil Series Descriptions for the Tobosa, Lipan and Angelo series (all three mapped in Tom Green County) and from NOAA climate normals for San Angelo.
Getting rainwater away from the slab so the clay stops swinging
Sunken piers, sagging beams and floors that bounce when you walk
Measured floor elevations and a written report before anyone sells you piers
Measured, written down, and no obligation either way.