# Erosion control after land clearing in Denton, TX

> Erosion control after land clearing in Denton, TX: silt fence, cover and seeding, TCEQ rules from 1 acre, creek buffers and why bare Denton clay runs off.

URL: https://postoaklandclearingdenton.com/erosion-control/

Silt fence, mulch cover and seeding put on cleared ground so the next hard rain leaves the soil where it is.

[Post Oak Land Clearing Denton](https://postoaklandclearingdenton.com/) offers and manages erosion control after land clearing across Denton and the west and north of Denton County, with the work done by licensed and insured contractors. Clearing changes how land handles rain. Take away the brush, roots and leaf litter, and the bare soil underneath takes every raindrop directly, seals over, and sends water and sediment downhill toward the street, the ditch or the creek. Silt fence, cover and seeding put back enough of that protection to hold the soil until grass does it on its own.

## What happens on the first visit

The first visit works out where water will go once the cover is gone. Expect a walk of the slopes and low edges, a look at ditches, culverts, draws and any creek on or next to the property, a read on the soil, and a plan for the silt fence line, the cover and the seeding, along with the permits that set the rules.

Water leaves most lots along one or two low edges, and that is where silt fence earns its place. The walk also notes where runoff concentrates into a small channel, since sheet flow and channel flow need different controls, and where trucks will come and go, because tracked mud on a road is erosion too. Creek edges get special attention: Denton protects riparian buffers along streams, and the cheapest erosion control is a strip of vegetation that never gets cleared.

## Why cleared Denton ground washes

Bare ground erodes when raindrops hit it, loosen particles and then carry them off in runoff. Vegetation stops the first step, roots hold the second, and leaf litter slows the third. Clear all three away and the outcome depends on the soil, the slope and the rain.

Denton’s rain arrives in bursts. The 1991 to 2020 normals at Denton Municipal Airport give 35.60 inches a year, with the wettest months in May at 4.52 inches and October at 4.17, and about 22 days a year bring half an inch or more. Those heavy days do the damage, and they fall in the same months many clearing jobs are scheduled.

### Clay west and north, sand to the south

The soil sets how the damage shows. West and north of Denton the USDA soil survey maps mostly Sanger clay, Slidell clay and Mingo clay loam, hydrologic group D soils that take in water slowly. Rain on bare group D clay seals the surface within minutes and runs off almost at once, carrying fine particles that turn the water the color of chocolate milk and stay suspended long after it stops moving. South-central Denton County, through the Cross Timbers band toward Argyle, has sandy loams such as Gasil fine sandy loam, which soak up water faster but loosen and cut into rills and gullies once runoff gathers.

### Slope

Most of the county is gentle, with soil survey slopes mostly between 0 and 5%. The steeper ground sits beside creeks and draws, where slopes reach 8% and more, and that is also where runoff concentrates and where soil reaches water fastest. A few percent of slope on a long cleared run gathers more water than a steep but short bank, so the length of the bare run matters as much as its pitch. On ground that falls toward a creek, [selective clearing](https://postoaklandclearingdenton.com/selective-clearing/) that leaves the lower trees standing does more than any control installed afterward.

## Silt fence, cover and seeding: what each one does

These three do different jobs, and erosion control that works on Denton clay uses all three. Silt fence catches what moves. Cover keeps it from moving. Seeding replaces the cover with something permanent.

### Silt fence

Silt fence is a woven geotextile on stakes, with its bottom edge buried in a trench so water cannot run under it. It goes along the contour on the downhill side of bare ground, with the ends turned uphill so water does not just flow around. It works by ponding runoff briefly so heavier sediment settles behind it. On clay that is a partial answer, because the fine particles settle slowly and some pass through. Fence also fails if it crosses a channel, gets overtopped or is left to sag, so it needs a look after every heavy rain and sediment cleared when it builds up.

### Cover

Cover is what stops erosion at the source. A layer of mulch takes the raindrop impact, keeps the clay surface open so water soaks in, and slows what runs off. On land cleared by [forestry mulching](https://postoaklandclearingdenton.com/forestry-mulching/), the cover is already there. On ground cleared by [clearing and grubbing](https://postoaklandclearingdenton.com/clearing-and-grubbing/) or grading, mulch from the job can be spread back over areas that are not being built on, and straw or other mulch covers the rest. Rock at the construction entrance belongs in this group, since it keeps trucks from tracking clay onto the road.

### Seeding

Seed turns temporary cover into roots. Warm-season grasses establish from late spring into early summer when the soil is warm and before the dry stretch of July, Denton’s driest month at 1.77 inches. Ground cleared in fall or winter is usually mulched and given a quick cool-season cover to hold it until spring seeding. Seeding into mulch works where the layer is thin; a thick mat needs raking back first.

## Stormwater rules: TCEQ and the towns

Texas regulates erosion from clearing by the size of the disturbance, and the cities add their own requirements. Under the TCEQ construction general permit, TXR150000, clearing, grading or excavating that disturbs 1 acre or more needs coverage, including a stormwater pollution prevention plan, called a SWP3, and posted site notices. At 5 acres or more, or as part of a larger plan that will disturb 5, the operator also files a Notice of Intent, at $225 electronically or $325 on paper ([TCEQ](https://www.tceq.texas.gov/)). Under 1 acre, TCEQ coverage does not apply unless the work is part of a larger common plan. Grubbing and grading clearly count as disturbance; whether a mulching job that leaves roots and groundcover counts depends on how much soil it actually opens.

Local rules come with the clearing or grading permit. Inside Denton, the city may deny a clearing and grading permit when erosion and sediment controls are inadequate, and violations bring a short cure period, then a stop-work order, referral to TCEQ and city cleanup billed to the permit holder. Inspections run through the Watershed Protection Division. [Justin](https://postoaklandclearingdenton.com/service-areas/justin/) requires erosion control to be installed and maintained at all times during dirt work. [Sanger](https://postoaklandclearingdenton.com/service-areas/sanger/) requires every control in place before grading starts, an erosion control plan sealed by a licensed engineer for early grading, and no brush placed where it can drain to the storm sewer or a creek. [Argyle](https://postoaklandclearingdenton.com/service-areas/argyle/) folds erosion control into its residential grading and drainage permit. Ponder’s rules are confirmed per address.

## Creek buffers and floodplain edges

The cheapest erosion control along a creek is not clearing it. Inside Denton, environmentally sensitive area rules protect riparian buffers of 50 feet from the stream centerline where the stream drains 1 square mile or less, and 100 feet where it drains more. Tree and understory removal is prohibited in those buffers, and private yard clearing may disturb no more than 10% of a buffer, never closer than 25 feet to the centerline. Undeveloped floodplain is protected the same way. Land disturbance in a mapped sensitive area needs a field assessment by a qualified biologist or wetland specialist, with a city fee of $1,118. In unincorporated Denton County, excavation or fill in a flood zone needs a county development permit.

Even where no rule applies, a vegetated strip left along a creek or draw filters runoff better than any fence, and it costs nothing to keep. The [clearing near creeks and floodplains guide](https://postoaklandclearingdenton.com/guide/clearing-near-creeks-and-floodplains/) covers the details.

## What erosion control costs

Silt fence has a public benchmark. On seven Denton County highway contracts, TxDOT low bids for installed silt fence ran $3.40 to $5.00 a foot, and removal ran about $0.85 to $1.50 a foot. Those are large, open public jobs; a short run on a single lot usually costs more per foot because setup is spread over fewer feet. The TCEQ Notice of Intent, where needed, is $225 electronic or $325 paper, and Denton’s clearing and grading permit, which carries the city’s erosion review, is $453.

Cover and seeding are priced from the ground: the bare area, whether mulch from the clearing can be reused, seed type and season, slope, and how far materials must be carried. NRCS estimates the cost of critical area planting, its seeding practice for eroding ground, at $578.25 an acre, an agency estimate behind cost-share payments rather than a market price. [Land clearing and grading](https://postoaklandclearingdenton.com/land-clearing-and-grading/) and the [cost per acre guide](https://postoaklandclearingdenton.com/guide/land-clearing-cost-per-acre/) show where erosion control sits in a larger job, [when to clear land in North Texas](https://postoaklandclearingdenton.com/guide/when-to-clear-land-in-north-texas/) covers timing around the wet months, and [clearing land to build a house](https://postoaklandclearingdenton.com/guide/clearing-land-to-build-a-house/) puts it in the building sequence. The wider rules are in [clearing land in Denton](https://postoaklandclearingdenton.com/guide/clearing-land-in-denton/).

## What's included

- A walk of the slopes and drainage paths to see where water will leave the cleared ground
- Silt fence along the downhill edge, trenched in and staked, before soil is opened where possible
- Mulch from the clearing, or brought in, spread over bare soil
- Seeding of bare ground with a mix suited to the season
- Rock at the entrance where trucks leave the site, so mud stays off the road
- Fiber rolls across small swales where runoff concentrates
- Inspection after heavy rain and removal of silt fence once grass has taken hold, where the job includes it

## Silt fence, mulch cover, seeding and a standing buffer compared

*Silt fence, mulch cover, seeding and a standing buffer compared*

| Option | Silt fence | Mulch cover | Seeding | Vegetated buffer left standing |
| --- | --- | --- | --- | --- |
| What it does | Slows sheet runoff and traps sediment at the edge | Breaks raindrop impact and keeps the surface open | Roots bind the soil for the long term | Filters runoff before it reaches a creek or neighbor |
| Where it goes | Downhill edges, above ditches and creeks | All bare ground that is not being built on | All bare ground that will stay open | Along creeks, draws and property lines |
| How long it works | Until the ground is stabilized, with upkeep | From day one until grass closes in | Weeks to start, a season to establish | Indefinitely, if left alone |
| Limits on Denton clay | Fine clay passes through; it catches coarser sediment | Thin layers wash on steeper spots | Slow in July and August without rain | None, but it has to be planned before clearing |
| Cost basis | Per foot installed, plus removal | Machine time, or free if mulch comes from the clearing | Seed, spreading and timing | Nothing to install |

## Related resources

- [Can you clear brush along a creek or in a floodplain around Denton?](https://postoaklandclearingdenton.com/guide/clearing-near-creeks-and-floodplains/): Why creek banks and floodplains are the most restricted ground to clear around Denton, how to tell whether a lot is affected, and what work is still possible.
- [What does clearing land to build a house involve?](https://postoaklandclearingdenton.com/guide/clearing-land-to-build-a-house/): The order a homesite is cleared in, from staking the footprint to the grading handoff, and why cleared ground is still not a building pad.
- [When is the best time of year to clear land in North Texas?](https://postoaklandclearingdenton.com/guide/when-to-clear-land-in-north-texas/): Rain, clay, oaks, birds, burn bans and regrowth all have a season around Denton. Here is how they line up through the year.
- [How much does land clearing cost per acre in Denton?](https://postoaklandclearingdenton.com/guide/land-clearing-cost-per-acre/): Typical per-acre ranges, the public figures inside a Denton price, and why the same acre can cost twice as much on a different lot.
- [Clearing land in Denton, TX: what to know before the first machine arrives](https://postoaklandclearingdenton.com/guide/clearing-land-in-denton/): Methods, regrowth, stumps, debris, permits, taxes and timing on Denton clay, answered in the order the questions come up.

## How a clearing job runs

### Call or send the form

Acreage, address, what's growing and what you want the ground for.

### Walk the property

Trees to keep are marked, ground and access checked, permits listed.

### Clear

Mulched, cut or grubbed by the method agreed, working around what stays.

### Finish

Debris mulched or hauled, bare ground covered or silt-fenced.

## Erosion control questions

### Do city erosion rules still apply when TCEQ's 1-acre threshold isn't met?

Yes. Small jobs fall outside the TCEQ permit unless they are part of a larger plan, but the towns set their own rules. Denton reviews erosion controls with its clearing and grading permit and can deny one that lacks them, Justin requires erosion control at all times during dirt work, and Sanger wants controls in place before grading.

### How long should silt fence stay up after land clearing?

Until the disturbed ground is stabilized, usually meaning grass has closed in or a lasting cover is in place, and the permit allows it to come out. Pulling it early sends the next storm's sediment straight off the site. Fence left long after stabilization sags, collects trash and becomes a cleanup job of its own.

### When should grass seed go down on cleared Denton clay?

Warm-season grasses establish in spring and early summer once the soil warms, before the dry months of July and August, when Denton averages under 2.5 inches of rain a month. Ground cleared in fall is usually covered with mulch or a quick cool-season cover crop to hold it through winter, then seeded with permanent grass in spring.

### Why does muddy water still pass through silt fence on clay soil?

Silt fence works by slowing runoff so heavier particles settle out behind it. Sand and coarse silt drop quickly, but the fine particles in Sanger and Slidell clay stay suspended for a long time, so some cloudy water gets through. On clay, keeping the ground covered with mulch and grass matters more than the fence.

### Who installs erosion control on clearing jobs arranged by Post Oak Land Clearing Denton?

Post Oak Land Clearing Denton offers and manages erosion control as part of the clearing job, from setting the silt fence line to scheduling, and the installation is done by licensed and insured contractors. Who signs as operator on a TCEQ stormwater permit is the owner's or builder's decision.

## Related services

### [Clearing and grading](https://postoaklandclearingdenton.com/land-clearing-and-grading/)

Clearing, grubbing and rough grading done in order, ending with a shaped pad and drainage ready for the builder's next step.

### [Forestry mulching](https://postoaklandclearingdenton.com/forestry-mulching/)

Brush, cedar and small trees ground in place into a mulch layer, with stumps left at grade and roots holding the soil.

### [Clearing and grubbing](https://postoaklandclearingdenton.com/clearing-and-grubbing/)

Trees cut, then stumps, root balls and buried organics pulled out where a pad, drive or pond will go, leaving bare soil for grading.