Removal of water, sediment, sludge, trash and debris from underground detention vaults and the stormwater components tied to them.
Underground detention vaults in Universal City work quietly until they do not. On the northeast side of Bexar County, near Randolph AFB, a lot of these systems went in decades ago to serve established neighborhoods and the retail and apartment sites that grew up around them. Sediment, trash, and sludge build up out of sight, and by the time water is sitting where it should have drained, the vault has usually needed attention for a while.
The ground here is the real driver. Thin clay over bedrock does not absorb runoff the way sandier soil does, so water moves fast across the surface and carries fine sediment straight into the forebay. We see it as slow drawdown after a storm, a silted-in forebay near Olympia Hills, volunteer trees taking root on an embankment in Forest Crest, or an outlet structure in Northview that has gone from a trickle to a dribble. None of that is unusual for this part of Bexar County. It is just what thin clay and older grading do over time.
Working with Corral Bros on this scope means a site walk first, so you know what is actually in the vault before we schedule a crew. We dewater, remove sediment and sludge, clear trash and debris, clean the connected pipes and chambers, and run the job under confined-space safe practices the whole time. You get a system that drains the way it was designed to, handled by a local crew that has been inside enough vaults in this county to know what thin clay and a hard rain will do to one.
We're a local, family-built company that treats your Universal City 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 schedule a free on-site visit, usually within 48 hours of your call, and open the access hatches to look at water depth, sediment load, and the condition of the outlet structure. For properties near Forest Crest or Olympia Hills, we also check how the vault ties into downstream pipe runs before we quote a number, so there are no surprises once the crew shows up with equipment.
Most vaults in Universal City need attention every two to four years, but that shortens if the site has bare slopes or a lot of fine clay runoff, which is common near Northview and Olympia Hills. Slow drawdown after a storm, standing water in the forebay, or a plugged outlet are the signs we hear about first, and any of those is reason to get it looked at sooner.
We coordinate access and timing with property management or the HOA board ahead of the job, and we stage equipment to hold as few spaces as possible, which matters on tighter apartment and retail lots. Confined-space entry means part of the crew works below grade with the hatch open and cones out, so traffic flow around the vault area is the main thing we ask residents to avoid.
Thin clay over bedrock near Randolph AFB does not let water infiltrate well, so vaults here tend to hold sediment longer and fill faster after a hard rain than systems in sandier soil. We regularly find silted forebays and slow-draining chambers on older sites in Forest Crest and Northview, where the original grading has settled or shifted over the years.
Depth of sediment and sludge is usually the biggest factor, along with how much trash and debris has collected and whether connected pipes and chambers need cleaning too. Vaults with restricted access, a high water table at the time of the job, or an outlet structure that needs extra work all add time, so we price after the site walk rather than guessing over the phone.
Yes, we clean vaults as part of site closeout so the system is handed to the association or property manager in working order, with sediment, sludge, and debris removed per the plan. We coordinate with the general contractor's schedule and work alongside the property engineer when there is a punch list item tied to the stormwater system.
Free, no-pressure estimate from a local crew. Call (737) 404-9343 or request a quote online.
