Repair and stabilization of eroded pond slopes, embankments and channels using grading, soil stabilization, vegetation or riprap.
Detention pond erosion repair in San Marcos usually starts with a phone call from someone who noticed a slope that was not there last year. The San Marcos River and the spring-fed creeks that feed it keep groundwater close to the surface across much of the city, and a basin that was graded correctly five or ten years ago can shift once that water finds a new path through thin upland soil. Add a heavy spring storm and an embankment can lose ground fast.
On the thin upland soils around Blanco Gardens and Willow Creek, erosion tends to show up as rilling on the pond side slopes and a forebay that fills with silt faster than the plans anticipated, slowing drawdown after every storm. Older rental properties near campus often have bare or thinly grassed slopes that were never stabilized after construction, while newer sections like Kissing Tree can develop undercut outfalls or volunteer trees rooting into an embankment because nobody has walked the basin in a while. Spring-fed flow means some of these systems carry water even in a dry month, so the damage keeps working even when it has not rained.
Call Corral Bros and we walk the pond with you, point out what is actively failing versus what is just cosmetic, and put a plan in front of you that matches the scope, regrading a slope, armoring an outfall, reseeding a bare bank. We coordinate around leasing schedules, HOA meetings, and whatever access your property allows, and we do the work to the standard your engineer or the original site plan calls for. You get a basin that holds its shape through the next storm instead of a surprise before the next inspection.
We're a local, family-built company that treats your San Marcos property like our own, tidy crews, clear pricing, and detention pond erosion repair that holds up to Hays 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 walk the pond with whoever manages the property, a board member, an association manager, or a GC closing out a site. We look at slopes, the forebay, the outfall, and any channel erosion, then give you a straightforward scope and price with no obligation to move forward.
It depends on soil, slope, and how much flow the basin handles, but thin upland soils here erode faster than heavier clay soils elsewhere, and a basin that was not stabilized at construction often needs attention within a few years. A sudden heavy rain event, a slow drawdown after storms, or visible bare slopes are usually what triggers the call rather than a fixed schedule.
We plan access and equipment staging around your leasing office, resident parking, or retail hours before we schedule the work, not after. For university-town rentals and active-adult communities where traffic patterns matter, we talk through timing with the property manager or board so the crew is not blocking a lot or a walking path during peak hours.
Spring-fed groundwater keeps soil saturated longer than people expect, even between storms, which softens slopes and speeds up erosion once bare soil is exposed. Combine that with thin upland cover and an intense spring or fall rain event, and a basin that looked stable can develop rilling, a silted forebay, or an undercut outfall faster than it would in drier parts of the county.
The main factors are how much regrading the slopes need, whether the outfall or channel requires riprap or matting instead of just reseeding, and how much silt has to come out of the forebay before stabilization work can start. Access limits on tighter apartment and HOA sites, and whether volunteer trees or brush need clearing from the embankment first, can also add time.
Free, no-pressure estimate from a local crew. Call (737) 404-9343 or request a quote online.
