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:
The current Construction Stormwater General Permit (CSWGP) will expire December 31, 2015. Ecology plans to issue the new CSWGP in November 2015 with an effective date of January 1, 2016. All Permittees must reapply per Section G8 of the current permit. Reapplication Instructions and Information
Proposed Permit Documents
Current Permit Documents
Public Comment Period July 1 - August 10, 2015
Ecology will consider all public comments before issuing the final CSWGP in December 2015, with an effective date of January 1, 2016. The public comment period is now closed.
Ecology hosted six public workshops in Vancouver, Mount Vernon, Moses Lake, Seattle, University Place, and as a Webinar to explain proposed changes to the CSWGP and answer questions. A public hearing was held at University Place in Pierce County, to allow interested parties to provide oral testimony on the draft CSWGP. Workshop slides
Note: dates/locations subject to change.
Contact Us - Contact your Permit Administrator for permit assistance or your Regional Office for site specific questions.
Permit, Forms and Application - 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
It’s Time to Reapply
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