Updating Stormwater Regulations - Get Involved

Get Involved

The first draft documents of the 2021 Stormwater Code and Manual, supporting documentation, and other related project code changes were shared in April 2020 for public comment. They are still available for your review on the Project Documents page, but have not yet been updated. SPU and SDCI are busy responding to Ecology comments, public comments, and internal comments. We will post revised draft documents during the two upcoming public review periods:

  • November 2 - November 20, 2020: The revised draft Stormwater Code, Volume 1 of the Manual, and Appendix B (Additional Submittal Requirements) will be posted for public review.
  • January 11 - February 19, 2021: The full revised draft of the Stormwater Manual (all Volumes and Appendices) will be posted for public review.

Please use the comment template to submit your comments to SPUStormwaterCodeRev@seattle.gov or mail them to the address below:

Sherell Ehlers
Seattle Public Utilities
700 Fifth Ave, Suite 4400
PO Box 34018
Seattle, WA 98124-4018

Email correspondence is preferred.

Comment Instructions

If you're suggesting a code revision, please complete the comment template and include the following information:

  • Number and title of the code section (for example: 22.805.070.D.a)
  • Specific code language you're suggesting
  • Explanation of why the code should be changed

If you're suggesting a manual revision, please include the following information:

  • Volume, chapter, section, and page number in the 2021 Draft Manual
  • Specific manual language you're suggesting
  • Explanation of why the manual language should be changed

Email your comments to SPUStormwaterCodeRev@seattle.gov or mail them to the address noted above. We may not be able to respond to individual comments, but we will take all comments into consideration.

Public Meetings

We will be holding the following online public meetings to describe the proposed changes:

  • November 12, 2020 (Completed): This meeting focused on changes to the Stormwater Code, Volume 1 of the Stormwater Manual, and Appendix B (Additional Submittal Requirements), and Appendix I (Landscape Management Plan and Integrated Pest Management). If you missed this meeting, watch the recording and take a look at the PowerPoint. Please note: the graphs of the Peak Flow Control Standard changes on pages 37 and 38 were incorrect in the meeting presentation and are corrected in the files posted here.
  • January 28, 2021This meeting will focus on changes to the full revised draft of the Stormwater Manual (all volumes and appendices) since the spring 2020 public review period.

We previously held 2 online public meetings: April 26 and May 6, 2020. If you missed them, watch our recording of the April 26 meeting and take a look at the PowerPoint!

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