Silt Fence & SWP3 Sediment Control in Houston, TX

Silt fence and SWP3 sediment control is the work that keeps soil from leaving a construction site in Houston before the ground is seeded. We trench in silt fence along the downslope edges of lots and pads, protect storm drain inlets, and maintain those controls as the job goes on. Builders, remodelers, pool contractors and site contractors call us when a stormwater plan calls for sediment controls, when an inspector has flagged fence that is down, or when a project is finally seeded and the fence needs to come out.

What the state requires

Under the TCEQ Construction General Permit, TXR150000, any project that disturbs an acre or more and discharges stormwater to surface water in the state needs coverage. So does a smaller lot when it belongs to a bigger development, built out under one plan, that disturbs an acre or more in total. Small construction activities disturb 1 to under 5 acres; large ones disturb 5 or more. Every operator must develop and put in place a Stormwater Pollution Prevention Plan before construction begins. The SWP3 lays out the best management practices for the site, and on most Houston lots that list leads with silt fence and inlet protection. TCEQ also publishes the site notice forms that permitted operators use.

Why sediment moves so easily here

Houston's flat terrain and low-permeability clay soils mean water sheets across a bare lot instead of soaking in. It carries fine clay and silt with it, and that sediment ends up in street gutters, storm inlets and eventually the bayous. With measurable rain on about 104 days a year at Bush Intercontinental and frequent heavy storms, a fence that is not trenched in or not maintained fails often. Fine clay passes through or under poorly installed fence, so installation details matter more than the fabric itself.

How we install silt fence

We follow the layout in your SWP3 or site plan, running fence across the slope on the low sides of the disturbed area rather than straight down it. Fabric is buried in a trench on the uphill side and backfilled and compacted so water cannot run underneath, and posts are driven at the spacing the plan or product calls for. Where fence has to cross a swale or catch a lot of flow, we use reinforced or wire-backed fence or recommend another control. Ends are turned upslope so water does not simply run around them.

Inlet protection

Curb and area inlets near a site need a barrier, or sediment off the lot ends up in the storm sewer. Depending on the inlet and traffic, we use silt fence barriers, sandbags, gravel and wire mesh, or devices set under the grate. Street inlets need protection that does not create a flooding hazard in heavy rain, which on Houston streets is a real concern.

Maintenance and removal

Silt fence is not set-and-forget. Sediment builds up behind it, posts lean, and mowers and trucks knock it down. We can inspect and repair fence on a schedule or after storms, remove built-up sediment, and replace damaged sections. When grass has the site covered, the fabric and stakes come out, we smooth the slot where the fence was buried and spray seed on that strip, so there is no bare line left behind. As silt fence contractors who also hydroseed, we can do the final seeding on the same visit.

Construction entrances and other controls

Silt fence is only one part of most plans. Mud tracked onto the street by trucks is a common complaint, so many SWP3s also call for a stabilized construction entrance at the driveway, along with concrete washout areas and stockpile covers. We focus on fence, inlet protection and the seeding that ends the job, and we coordinate with whoever handles the rest so the controls work together. When a lot changes hands from the site contractor to the builder, fence often gets moved or driven over. A quick walk at that handoff catches gaps before the next storm finds them.

What it costs

A 2025 bid-price sheet from a state highway agency puts plain (unstabilized) silt fence at $378 and stabilized silt fence at $748, both per 100 feet. The same list prices inlet protection at $102 for a silt fence barrier, $141 for sandbags and $172 for gravel and mesh, each. Houston jobs vary with access, soil and how much maintenance is included, so our quote lists installation, upkeep and removal separately.