Municipal
WSDOT's municipal stormwater discharges are covered under the following three separate municipal stormwater general permits:
The Washington State Department of Ecology plans to issue a separate permit to cover discharges from municipal separate storm sewers owned or operated by WSDOT. Learn more about stormwater and what WSDOT is doing to manage stormwater on this Question and Answer page. Additional information describing the proposed WSDOT-only stormwater permit can be found in this folio. (pdf 448 kb)
WSDOT submitted an application to the Washington State Department of Ecology for coverage under a WSDOT-only permit to cover its municipal stormwater discharges.
WSDOT NPDES and State Waste Discharge Statewide Municipal Stormwater Permit Application (pdf 1.58 mb)
Application Attachments:
In August 2005, WSDOT submitted a letter (pdf 360 kb) to the Washington State Department of Ecology to modify this application by limiting the geographic scope of the WSDOT permit to include only the applicable NPDES Phase I and II designated areas requiring permit coverage.
Construction
The Washington State Department of Ecology's Construction Stormwater General Permit regulates stormwater discharges from construction sites. Projects with particularly sensitive environmental concerns may be required to obtain an individual NPDES construction stormwater permit.
Industrial
Washington State Department of Ecology's Industrial Stormwater General Permit regulates stormwater discharges from Washington State Ferries' Eagle Harbor Maintenance Facility.
Sand and Gravel
Washington State Department of Ecology's Sand and Gravel General Permit regulates discharge of pollutants from WSDOT's sand and gravel mining operation.