Help protect and improve natural habitat and water quality, manage and minimize affects from our daily activities and construction projects, comply with regulations, and achieve the Washington State Department of Transportation’s (WSDOT) strategic plan goal for environmental stewardship.

Find the Temporary Erosion and Sediment Control (TESC) manual, templates, checklists, and policy guidance on this page to get and transfer permit coverage, develop contracts, write erosion control plans, and submit discharge monitoring reports for your project.

Identifying and reporting spills, illicit discharges, and unauthorized connections that might affect the stormwater drainage system helps keep pollutants out of receiving waterbodies.

Information on our stormwater research efforts as well as compliance activities required by the Washington State Department of Transportation (WSDOT) Municipal Stormwater Permit and the Construction Stormwater General Permit.