The Texas Pollutant Discharge Elimination System (TPDES), administered by the Texas Commission on Environmental Quality (TCEQ) regulates stormwater discharges from various sources to surface waters of the State. The nature of TxDOT operations means some of our activities are regulated under this program.
There are two main types of TPDES permits that apply to TxDOT operations, the Construction General Permit and the MS4 Permit.
Construction General Permit
TxDOT’s construction operations are regulated by the Construction General Permit (CGP) TXR150000 which applies to stormwater discharges from construction projects that disturb one acre or more of ground. The CGP requires that TxDOT implement a Stormwater Pollution Prevention Plan (SWP3) that describes Best Management Practices (BMPs) designed to decrease erosion from and sediment generated by construction projects. To effectively manage construction activities, TxDOT has developed the following resources:
Municipal Separate Storm Sewer System (MS4)
TxDOT's statewide Municipal Separate Storm Sewer System (MS4) permit is required to discharge stormwater from ditches and storm sewers in areas that meet certain population and population density criteria. This permit require that we implement a Stormwater Management Program (SWMP) that describes Minimum Control Measures (MCMs) designed to decrease trash and illegal pollutants that come into our storm sewer system, and improve the quality of stormwater that comes out of it.
For questions about the Stormwater Program, email us and mention stormwater in the comments