Underground detention and stormwater control measures (SCMs) for tight sites, parking lots and developments.
Universal City's older northeast-side neighborhoods, from Forest Crest to Northview to the newer build-out around Olympia Hills, all send their runoff somewhere, and a lot of it goes underground. Subsurface stormwater control measures, chambers, vaults, and buried pipe systems, quietly handle detention for parking lots, apartment sites, and retail centers where there is no room for an open pond. The thing about buried systems near Randolph AFB is that nobody notices them until water starts backing up into a parking lot or a drive aisle during a hard rain.
Thin clay sitting over bedrock is the defining soil condition in this part of Bexar County, and it does not let water move the way deeper soils do. On older sites that means slow drawdown after storms, sediment settling into chamber beds faster than expected, and outlet structures that choke on silt washed off aging pavement. On newer infiltration systems around Olympia Hills, that same bedrock can leave a system underperforming from day one if the original design did not fully account for how little the ground actually absorbs.
Working with Corral Bros on this scope means a straightforward site walk, a plan written for what we actually find in your structures, not a generic checklist, and work scheduled around your tenants, residents, or move-in dates if you are a developer closing out a site. We are a family-run, licensed and insured contractor, and we handle the inspection, cleaning, jetting, and maintenance your system needs to stay in compliance, done to the original plan or alongside your property engineer when design questions come up.
We're a local, family-built company that treats your Universal City property like our own, tidy crews, clear pricing, and subsurface stormwater control measures that holds up to Bexar County conditions. Available as a one-time project or part of an ongoing plan.
A subsurface stormwater control measure is used when there isn't room for a surface pond, tight commercial lots, parking areas and dense developments. The system goes underground (chambers, vaults or pipe galleries) and stores or infiltrates stormwater beneath the site, freeing up the surface for parking or building.
Yes. Subsurface SCMs accumulate sediment and debris and must be inspected, cleaned and jetted on a schedule to keep working and stay compliant. We service, clean and retrofit underground detention and infiltration systems throughout Central Texas.
We schedule a free on-site visit, usually within 48 hours, and walk the site with whoever manages it, whether that is a property manager, HOA board member, or a GC closing out a site. We open accessible structures, check inlets and outlets, and look at drawdown history if you have it. You get a straightforward scope and a plan, not a sales pitch.
Most chamber, vault, and pipe systems in Universal City need inspection and cleaning on an annual basis, with jetting added if sediment or grease has built up faster than expected. Sites close to Randolph AFB and the older Forest Crest and Northview corridors tend to collect more fine sediment because of the thin clay soils, so some associations move to a twice-a-year schedule after the first inspection shows why.
Yes, we plan jetting, confined-space entry, and vault work around your parking counts and traffic patterns, and we coordinate timing with on-site management so residents and tenants are not caught off guard. At apartment and retail centers near Olympia Hills, that usually means closing a few spaces at a time instead of a whole lot, and working outside peak arrival and departure windows when we can.
That ground does not drain the way sandy or deep-soil sites do, so subsurface chambers and infiltration systems here are more prone to slow drawdown when sediment seals the stone bed or a pipe run settles unevenly over bedrock. We check infiltration rate and pipe grade as part of the inspection, and when a system is underperforming because of that base condition, we handle the retrofit or cleaning in line with the original plan or your property engineer's direction.
Access is usually the biggest factor, since a vault under a loading dock or a chamber bed under a parking lot costs more to reach than an open forebay. Sediment volume, how many structures are on the system, whether jetting is needed versus a straightforward cleanout, and any pipe or chamber repair found during inspection all factor in too. We price it after the site walk, not before.
Free, no-pressure estimate from a local crew. Call (737) 404-9343 or request a quote online.
