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.
Permit and Related Documents
Contact Us - Contact your Permit Administrator for permit assistance or your Regional Office for site specific questions.
Resources and Guidance - DMRs, Stormwater monitoring, manuals, 303(d) list information, CESCL.
Questions? Contact Amy Moon at 360-407-6467 or firstname.lastname@example.org
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