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1900 SW 4th Ave, Portland, OR 97201

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Proposed Changes to the Stormwater Management Manual (SWMM)

City of Portland, Bureau of Development Services

April 4, 2016


The Bureau of Development Services wants to share the following information with our customers and the community about upcoming revisions to the Stormwater Management Manual being processed by the Bureau of Environmental Services. 

The federal Clean Water Act and the Safe Drinking Water Act require Portland to implement post-construction stormwater management for both private property and the public right-of-way. Portland developed its Stormwater Management Manual (SWMM) in 1999 and is currently updating the SWMM.

BES will accept public comment on the proposed SWMM revisions from 8:00 a.m. April 4, 2016 through 5:00 p.m. May 6, 2016. The proposed SWMM changes will be posted for review at Public comments may also be submitted online, by mail, or by email.

If a public hearing on the proposed SWMM changes is requested, the city will hold a hearing on Wednesday, April 20 at 5:30 p.m. at 1900 SW 4th Avenue in Room 2500B. If the city does not receive a request to hold a public hearing by 5:00 p.m. on April 18, the hearing will be cancelled.

To request a public hearing, contact Amber Clayton at 503-823-4356 or email If you would like to comment on the proposed SWMM revisions by email, email your comments to If you would like to comment on the proposed SWMM revisions by mail, mail your comments to Amber Clayton, 1120 SW 5th Avenue Room 1000, Portland, Oregon 97204.

All comments must be received by 5:00 p.m. on Friday, May 6, 2016.