Removal of water, sediment, sludge, trash and debris from underground detention vaults and the stormwater components tied to them.
Pull the hatch on a Stone Oak detention vault after a few years of bexar county rain and you'll usually find the same thing: a dark line of sludge across the floor, a forebay packed with caliche silt, and a trash rack bowed in from a summer's worth of mulch and plastic bottles. That's the starting point for most of our underground detention vault cleaning calls in San Antonio, not an inspection form.
This city's ground and weather combine in a particular way. Caliche and limestone shelves don't absorb water fast, so runoff moves hard and fast off rooftops and parking lots and carries fine sediment straight into the vault. Older Alamo Heights sites built before modern grading standards often show outlet pipes half buried in silt, while newer Stone Oak construction sheds a lot of loose soil in the first few storms after the builder leaves. Either way, the symptom is the same: slow drawdown after rain, standing water that should have drained in a day still sitting there on day three.
Working with us on this looks straightforward. We walk the vault with whoever is responsible for the property, confirm what the plan calls for or talk it through with the project engineer if one's involved, then dewater, pull sediment and sludge, clear trash and debris, and run the connected pipes and chambers clean. Confined-space entry is handled the way it should be, every time, no shortcuts.
We're a local, family-built company that treats your San Antonio property like our own, tidy crews, clear pricing, and underground detention vault cleaning that holds up to Bexar County conditions. Available as a one-time project or part of an ongoing plan.
We come out, open the vault, and look at it with you, usually within 48 hours of your call. We check sediment depth, standing water, outlet condition, and access, then give you a free on-site estimate based on what's actually in there, not a guess from a plan sheet. No obligation to book on the spot.
It depends on the watershed above it, but a lot of Bexar County sites fall into a two to three year rhythm, sooner if the property is new construction still shedding loose fill or sits below a lot of impervious parking. Slow drawdown after rain, a visibly silted forebay, or a clogged trash rack are the signs that move the timeline up.
We stage around existing drive lanes and schedule around your heaviest tenant or resident hours when you tell us what those are. Most vault access points sit in landscape strips or at the edge of a lot, so we can usually keep the bulk of parking open and work a section at a time instead of closing the whole field.
Yes. Caliche and limestone shelves mean this ground sheds water fast and fine sediment settles hard in the forebay and low points of the vault. That buildup is heavier and more compacted here than in sandier soils, which is part of why drawdown slows down and outlets end up buried faster than owners expect.
Sediment depth and volume are the biggest factors, along with how much standing water needs to be pulled out first and how far we have to haul debris. Access matters too: a vault with a tight hatch or limited truck access takes longer than one with a clear path. Connected pipe runs that also need clearing add to the scope.
Free, no-pressure estimate from a local crew. Call (737) 404-9343 or request a quote online.
