A yard that squishes in May, breeds mosquitoes in June, and swallows a mower wheel in July isn't unlucky — it's doing exactly what its grading, soil, and pipes tell it to do. Here are the seven causes behind almost every chronically wet yard in the Chattanooga area, roughly in the order we find them.
Ridge-and-valley terrain means somebody gets the hillside's runoff, and if your lawn sits below Signal Mountain, Missionary Ridge, or even just the neighbor's backyard, storm water arrives faster than your soil can pass it along. The fix is interception — a swale or French drain across the flow path — not more grass seed.
Hamilton County clay absorbs water at a fraction of the rate rain delivers it. Water that can't soak in has to travel on the surface, and it stops wherever the surface stops sloping. Clay is also why "just add a dry well" often fails here — infiltration needs soil that infiltrates.
Soil settles over a foundation's first decade, and suddenly the lawn tilts toward the house instead of away. This is the cheapest serious problem on this list — a regrade restores positive slope — and the most expensive one to ignore, because the destination of that water is your crawlspace.
A roof concentrates thousands of gallons per storm into four or five pipes. If those pipes end at splash blocks, you are irrigating your foundation. Buried downspout extensions that carry roof water to daylight are the highest-value drainage dollars a homeowner can spend — systems start around $800.
Some Chattanooga lots stay wet in a drought because water is arriving underground, moving along rock until it surfaces in your lawn. The tell: a soggy strip that follows a line, not a low spot. Interception with a properly built French drain — fabric-wrapped stone, verified slope, real discharge — is the cure.
New construction uphill, a paved pad, a re-routed downspout — drainage problems are frequently inherited from next door. You can't regrade their lot, but you can defend your line with a swale or drain that routes their water around instead of through.
Half the failed drainage we replace was bought one gadget at a time — a basin here, corrugated pipe there — with no answer to the only question that matters: where is the water supposed to end up? Working systems are designed from the discharge backward.
Our assessment is free, on-site, and honest — we walk the water with you, ideally while it's raining. Sometimes the answer is a $400 regrade; when it's a full system, the quote is fixed and written. Start with yard drainage or French drains, or call (423) 497-3591.
Free on-site drainage assessments · Fixed written quotes
Call (423) 497-3591