Stormwater Discharges from Construction Activities That Disturb Less Than 1 Acre

Guidelines for runoff controls from construction projects in Texas that will disturb less than an acre and are not part of a larger common plan of development.

If your construction project disturbs less than 1 acre and is not part of a larger common plan of development, coverage under General Permit (TXR150000) is not required.

If your project is part of a larger plan, the total number of acres disturbed under that larger plan must be considered when determining how this general permit applies to you:

Example 1. A subdivision is being built. You are grading 0.75 acres, another company is clearing 4 different acres, and a contractor is excavating another 0.5 acres. Because the total area that would be disturbed under this common plan is 5.25 acres, each operator would fall under the requirements associated with disturbing 5 or more acres.

Example 2. At first, your project calls for you to grade, clear, or excavate a total of 0.93 acre. But after your project begins, you learn that you must disturb another 0.15 acre—perhaps to add more parking and an access road. Because this project has grown to disturb a total of 1.08 acres, you must obtain coverage under the requirements for disturbing 1 to less than 5 Acres.

You can view some of the relevant Rules for Stormwater Discharges from Construction Activities.