Irving, TX SWPPP & Stormwater Requirements

What does Irving require for SWPPP compliance?

Irving's stormwater ordinance requires construction inspections at least once every seven calendar days and within twenty-four hours of the end of a storm that is 0.5 inches or greater, with the SWPPP revised based on inspection results in no case later than seven calendar days following the inspection.

Earthwork needs a permit first

Irving's stormwater ordinance prohibits performing earthwork within the city without first securing an earthwork permit, with affirmative defenses only for earthwork proposed on a lot smaller than one acre developed with an existing single-family residence or earthwork performed in conformance with all applicable grading, erosion control and stormwater discharge regulations under a previously obtained and currently active building permit.

The permit is the gate — and it sits ahead of the dirt, not alongside it.

Bigger sites, sealed plans

For Irving sites in the ordinance's five-acre applicability set — five or more acres disturbed, a common plan of development disturbing five or more acres, a project required to obtain a federal stormwater permit for construction activity, or a discharge the director determines to be harmful quantities — the stormwater pollution prevention plan must be prepared, signed and sealed by a registered professional engineer, and any significant modification to it must be sealed the same way.

A sealed plan is an engineering deliverable, not a form — build the schedule around the engineer's turnaround.

The city's own program behind it

The City of Irving is authorized by the Texas Commission on Environmental Quality to discharge stormwater from its municipal separate storm sewer system under TPDES permit number WQ0004691000, which requires the city to prepare and implement a Stormwater Management Program addressing eight Minimum Control Measures — including Construction Site Stormwater Runoff — throughout the city.

The city holds that authorization jointly with the local flood-control districts, which is why the review reaches beyond the property line.

The ordinance and the trees

In Irving, the owner must comply with Chapter 41, Article X of the Code of Civil and Criminal Ordinances, submit an erosion control plan for approval by the City Engineer prior to any earth disturbing activities, and control erosion during and associated with the installation of subdivision improvements. On Irving property subject to the code's tree conservation requirements — which exclude occupied residential property, commercial property of two acres or less, and lots in districts with their own varying tree rules — no person may intentionally damage, remove, or otherwise cause or allow harm to any protected tree without first obtaining a tree removal permit.

Protected trees are a construction-sequencing item here, not a landscaping afterthought.

The state permit still applies

The city's rules sit on top of the state's, not in place of them. A stormwater pollution prevention plan (SWP3) must be prepared and implemented before construction activities begin. TXR150000's standard schedule requires construction site inspections at least once every 14 calendar days and within 24 hours of the end of a storm event of 0.5 inches or greater.

The city's permit and the state program run together for the life of the disturbance.

Inspections and the record

The operator owns the inspection record from first disturbance to final stabilization. Terradyne provides routine SWPPP inspection reports with cloud-based client access. See SWPPP Inspections for how the program works, and Silt Fence Installation for the perimeter the reviewers will look at first.

Check before you mobilize

Ordinances and city standards get revised; confirm the current documents with the city before you mobilize. For other North Texas cities, start at Local Compliance.