Construction Stormwater General Permit
Construction site operators are required to be covered by a Construction Stormwater General Permit if they are engaged in clearing, grading, and excavating activities that disturb one or more acres and discharge stormwater to surface waters of the state. Smaller sites may also require coverage if they are part of a larger common plan of development that will ultimately disturb one acre or more. Operators of regulated construction sites are required to:
Ecology reissued the Construction Stormwater General Permit (CSWGP) on November 18, 2015. The new CSWGP went into effect on January 1, 2016. Ecology received one appeal. Although the CSWGP has been appealed, the new permit is current effective January 1, 2016.
All Permittees must reapply per Section G8 of the current permit. Reapplication Instructions and Information
New Permit and Related Documents
Contact Us - Contact your Permit Administrator for permit assistance or your Regional Office for site specific questions.
Application and Forms - Permit, application, forms, and appeal information.
Resources and Guidance - DMRs, Stormwater monitoring, manuals, 303(d) list information, CESCL.
Historical Information - Pollution Control Hearing Board information, public comments.
Get Ecology updates about the Construction Stormwater General Permit - Sign up for the Construction Stormwater General Permit email listserv
Questions? Contact Amy Moon at 360-407-6467 or firstname.lastname@example.org
Reapplications were due July 3, 2015 - Reapply online to maintain permit coverage
Permit Application Status - Check the status of your application
Stormwater Pollution Prevention Plan Template - To use this template, save to your computer
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