Erosion Control and SWPPP Installation

Red clay in a rain runoff is hard to miss. It turns a ditch the color of brick, it stays suspended for days and it ends up where somebody has to answer for it. Erosion control is the work of keeping that clay on your site, and a stormwater pollution prevention plan is the paper that says how.

We install and maintain the physical controls: perimeter silt fence, wattles, rock check dams, inlet protection, stabilized construction entrances, sediment basins, temporary seeding and mulching, and concrete washout areas. We also carry out the inspections the plan requires and keep the records, so the site is ready for a visit from a regulator or an owner's representative on any given day.

On a site where the rain total for the year can exceed fifty inches, doing this halfway is more expensive than doing it right.

What the permit asks of the site

Construction stormwater in Texas is regulated by the state environmental agency through a general permit. As a rule of thumb, a disturbed area of one acre or more needs a stormwater pollution prevention plan and a posted site notice, and five acres or more also needs a notice of intent filed with the state before work starts. The owner or operator holds the permit, and the plan must name who inspects and how often.

Inside the City of Texarkana, a floodplain permit reviewed by the City Engineer applies to work in the 100-year floodplain, a point from the city's 2024 hazard mitigation plan. Local grading and drainage requirements are separate, so a site can need both a state plan and city approvals. Unincorporated Bowie County work should be confirmed with the county, because a third-party permit guide reports no county-issued general building permit. We build the controls to whichever plan we are handed and flag gaps in it before we install.

Controls that survive the first storm

We install controls before clearing and grading starts, not after the first rain makes the case for them. Silt fence is trenched and staked, not just stapled to the ground. Entrances get a rock pad deep enough to knock mud off the truck tires. Inlets get protection that matches the inlet type, since a bag that works on a curb inlet does nothing for a grate in a yard.

The best erosion control is a smaller disturbed area. We stage clearing so that only the portion about to be graded is bare, and we stabilize finished slopes immediately with seed, mulch or blankets. A slope left bare for three weeks in April is an erosion project waiting to happen. Where a basin is part of the final drainage design, we build it first and use it as the sediment trap, then clean and finish it at the end.

Creeks, floodplains and receiving waters

Many Texarkana-area sites drain to small creeks that are already stressed. The city's hazard mitigation plan names impaired streams including Swampoodle Creek just east of downtown and Cowhorn Creek between Summerhill Road and Robinson Road, and notes the 100-year floodplain mostly follows waterways. Developers working along the retail and medical frontage of Richmond Road and Summerhill Road, covered on our Richmond Road and Summerhill Road page, need controls that protect those channels.

Reservoir basins matter too. Wright Patman Dam sits on the Sulphur River about nine miles southwest of Texarkana, holds a flood control pool of 2,509,000 acre-feet and supplies water to Texarkana. Sediment that leaves construction sites in the watershed ends up downstream, which is one reason regulators watch the area. See Wright Patman Lake for the setting.

Inspections, repairs and records

The permit calls for inspections at set intervals and after qualifying rain events. We walk the controls, note what is damaged or full, repair it and record the date. Silt fence fills with clay quickly; we clean it before it reaches half the fence height. Check dams lose their stone to trucks, so we restock them. Records matter because a clean site with no inspection log reads, to a regulator, as a site that was not inspected.

Concrete work creates its own pollutant. Washout from trucks and pumps is high in pH, and we provide a lined or contained washout area that is cleaned out and closed at the end of the pour. We tie the earthwork controls to the concrete phase so the site does not trade one violation for another.

Finally, plan for the handoff. When the building is done, the temporary controls come out only after the permanent cover is established, and the owner files the closing paperwork the permit requires. We walk the site with the owner's representative at that stage, remove the fence and entrance stone, regrade the pads left behind and confirm that the vegetation will carry through its first dry summer. Pulling the controls early to save a week is one of the most common ways a clean site turns into a late-stage problem, so we do not do it.

What controls cost

Erosion control is a small percentage of a project but an unpredictable one. The base cost covers installation of the planned controls, a mobilization for maintenance visits and the inspection reports. Extras come from storms: a big event in March can destroy a hundred feet of fence and fill a basin, and the repair is real work.

We write the proposal with unit prices for maintenance and repair so the cost of a storm is predictable. Pair this with fine grading and detention and retention ponds for the final stabilization and permanent drainage. For general contractors and construction managers, we can carry the whole stormwater scope so the permit has one accountable coordinator, and for the biggest earthwork sites the mass grading trade crew builds the controls as it goes.

Put the plan on the ground

Send the SWPPP or the grading plan and we will price installation, maintenance and inspection visits as unit items, so a bad storm does not become a surprise.

Common Questions

Who is responsible for the SWPPP?

The permit holder, normally the owner or general contractor, is responsible, and each operator on site shares duties under the plan. We install and maintain the controls in our work area and perform inspections if you assign them to us in the contract.

How often must controls be inspected?

The plan sets the schedule, commonly every seven days and within a day or so after a rain of a certain size, or on a different cycle if the permit conditions allow it. We follow the plan on the project and keep the log.

Is silt fence enough?

Seldom alone. It works on gentle slopes and low flows. Steeper slopes, concentrated flow and big disturbed areas need basins, check dams, blankets and fast stabilization. We recommend the combination that fits the site.

What happens if the site fails an inspection?

We correct the deficiency quickly, document it and update the plan if the cause was a design gap. Repeat problems usually mean a control is the wrong type for the location, so we change it rather than patching it again.

Can you seed and stabilize at the end?

Yes. We place topsoil, seed, mulch or erosion blankets as the final stage, and we keep the controls in place until vegetation meets the permit's stabilization standard.

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