Flower Mound, TX Environmental Rules: Erosion Control (2026)
Key Facts
- Code
- Ch. 54 / TPDES CGP TXR150000
- NOI Required
- Sites disturbing 1+ acre
- SWPPP
- Must be on site during construction
- CTCDD Overlay
- Enhanced erosion controls required
- Final Stabilization
- 70% vegetative cover for NOT
Summary
Flower Mound requires erosion and sediment control measures on all construction sites per Chapter 54 and the TPDES Construction General Permit administered by TCEQ. Sites disturbing one acre or more must file a Notice of Intent and implement a Stormwater Pollution Prevention Plan with specific BMPs including silt fencing, inlet protection, and stabilized construction entrances.
TCEQ issued the renewal of the CGP with an effective date of March 5, 2023. Construction activities are regulated under the CGP if they discharge stormwater to any surface water in the state and disturb an acre or more of soil.
Large construction activities which disturb 5 or more acres, or are part of a larger common plan of development or sale that will disturb 5 or more acres, are regulated under this general permit.
Small construction activities which disturb at least 1 but less than 5 acres, or are part of a larger common plan of development or sale that will disturb at least 1 but less than 5 acres, are also regulated under this general permit.
Construction activities that disturb less than 1 acre, and are not part of a larger common plan of development or sale that would disturb 1 or more acres, are not regulated by this general permit.
The CGP requires construction site operators to develop and implement a Stormwater Pollution Prevention Plan (SWP3) prior to commencing construction. A SWP3 is a document that outlines construction plans and best management practices (BMPs) to control pollutants that may be discharged in stormwater runoff.
Official source re-checked September 7, 2026: the cited page had not changed since it was quoted.
Full Breakdown
Erosion control in Flower Mound is regulated under Chapter 54 of the Code of Ordinances and the TPDES Construction General Permit (TXR150000) issued by the Texas Commission on Environmental Quality. All construction sites disturbing one acre or more of land must file a Notice of Intent (NOI) with TCEQ and develop a Stormwater Pollution Prevention Plan (SWPPP) before land disturbance begins. Required best management practices (BMPs) include silt fencing along downslope perimeters, storm drain inlet protection, stabilized construction entrances to prevent sediment tracking onto public roads, temporary seeding or mulching of exposed soil within 14 days of final grading, and sediment basins or traps for drainage areas over 10 acres.
The SWPPP must be kept on site and available for inspection. Flower Mound inspectors conduct regular compliance checks during construction. The Cross Timbers Conservation Development District overlay requires enhanced erosion controls including additional vegetative buffers and reduced clearing limits to protect the natural terrain and tree canopy. Upon completion, a Notice of Termination (NOT) must be filed with TCEQ after final stabilization is achieved with 70 percent vegetative cover. Residential lot grading must direct stormwater away from foundations and not increase runoff to neighboring properties.
Violations & Fines
Erosion control violations can result in stop-work orders, town fines up to $500 per day, and TCEQ state penalties up to $25,000 per day for TPDES permit violations. Failure to maintain BMPs during active construction triggers immediate corrective action notices.
Frequently Asked Questions
When do I need an erosion control plan in Flower Mound?
What happens if erosion controls fail during construction?
Sources & Official References
Other rules in Flower Mound
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Erosion Control in Nearby Cities
How other cities in Denton County handle erosion control.