Updating Stormwater Regulations - Get Involved

Get Involved

Comment on the Draft 2021 Stormwater Code and Manual

Draft documents of the 2021 Stormwater Code and Manual, supporting documentation, and other related project code changes are now posted on the Project Documents page and will be posted from January 11 through February 19, 2021 for the third and final Public Review Period #3.

Please join us for the January 28 Public Meeting to review the changes made in the most current drafts. This meeting will highlight changes to the revised drafts of the Stormwater Code and Manual with an emphasis on the changes in Volumes 2, 3 and 4 of the Stormwater Manual and the Appendices that were not covered in the November 2020 Public Meeting as well as associated changes to the Grading Code and Land Use Code as well the NEW SPU Public Drainage System Requirements Director's Rule.

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.

Note: Draft documents of the 2021 Stormwater Code and Manual, supporting documentation, and other related project code changes were shared in April 2020 and again in November 2020 for Public Reviewer Periods #1 and #2 They are still available for your review on the Project Documents page.

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:

  • 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.

There have already been three previous public meetings and recordings of the meetings are available in the links as indicated below.

  • Spring of 2020 (Completed): Prior to submittal of the Draft Stormwater Code and Manual to Ecology 2 online public meetings were held on: 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!
  • 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.