Low Impact Development

Stormwater Management Requirements are Changing!

The City's stormwater management requirements are changing. These requirements will improve the health of our streams by adopting low impact development (LID) principles. Numerous policies in Redmond's Comprehensive Plan support the use of LID, and Redmond's Water Resources Strategic Plan, adopted in 2015, calls for the City to develop a "Low Impact Development (LID) approach...to support desired stormwater management strategies and as a required element of our NPDES permit."  In 2016, City staff will be revising the Redmond Municipal Code, the Redmond Zoning Code, and the Stormwater Technical Notebook.

As is required by the City’s NPDES stormwater permit, new standards will be adopted and apply to any project that is not vested before January 1, 2017.  Watch this page for updates about our process of revising code requirements and to learn more about LID in and around Redmond. Your participation in this process is welcomed.

Zoning Code Amendments
Update 9/22/2016

The City is proposing updates to the Redmond Zoning Code.

  • Most of the proposed zoning code changes are relatively minor clarifications and changes to definitions. To see proposed changes: LID-related Proposed Zoning Code Amendments.
  • One recommended zoning code change may be of greater interest — a 5% set aside of the net buildable areas at development sites (during site planning) to ensure the space for small storms infiltration facilities. The set aside can be co-located in areas such as landscaping set asides, and may be reduced during the civil engineering design phase.

Municipal Code Amendments
Update 9/16/2016

The City is proposing updates to the Redmond Municipal Code.

  • RMC 13.06. Minor updates do document names and definitions related to Source Control to coordinate with changes proposed in RMC 15.24. Proposed changes will be posted here when they are available.
    Draft Amendments RMC 13.06   
  • RMC 13.18. Updates to monthly stormwater billing. Proposed changes will be posted here when they are available.
  • 13.20: Updates to stormwater capital facilities charges to be coordinated with zoning code and stormwater notebook changes required by the NPDES permit. The change defines the amount of infiltration required in Downtown and Overlake regional facilities areas to meet Minimum Requirement 5. The new NPDES permit requires roof infiltration in downtown, so the downtown surcharge area is updated. The new permit defines LID feasibility, so the Overlake language that says to do “LID where Feasible” is revised to coordinate with meeting that need in an urban setting. Minimum Requirements 6 (runoff treatment) and Minimum Requirement 7 (flow control) are still met by the regional facilities as before.
    Draft Amendments RMC 13.20
  • RMC 15.24: Clearing, Grading, and Stormwater Management. Updates so that minimum requirements for stormwater management are aligned with the current stormwater permit and 2012 Ecology Manual. To see the proposed Redmond Municipal Code changes: Draft Amendments RMC 15.24.

Stormwater Technical Notebook (STN)
Update 9/20/16

The City is updating the Stormwater Technical Notebook (STN) based on the Department of Ecology’s 2012 Stormwater Management Manual for Western Washington (as amended in 2014) (2014 SWMMWW) To comply with our Phase II Western Washington Municipal Stormwater Permit (NPDES permit) adoption will occur by December 31, 2016.

View the Draft STN here: DRAFT STN 2017
View the 9/20/2016 Open House/Webinar presentation:  STN Open House (PDF) - Audio

Comments for this public draft are due 9/25/2016. Visit the link above for more information.

Community Outreach Summary

October 13, 2015 City Council Study Session - LID​
January 2016 Email to all recent permit applicants
Feb 23, 2016 Open House - LID Updates
March 1, 2016 Open House - LID Updates
April 25, 2016 Webinar - Zoning Code Changes
April 25, 2016 Briefing to Sustainable Redmond - LID Updates
June 7, 2016 City Council Staff Report - LID Updates
June 8, 2016 Planning Commission Public Hearing - Zoning Code
August 16, 2016      2016 City Council Staff Report - LID Updates
August 2016 Briefing to OneRedmond - LID Updates
Sept 9, 2016 STN Draft Published for Comment
Sept 20, 2016 2016 STN Open House & Webinar (PDF) / Audio
Sept 27, 2016 2016 City Council Study Session
Oct 9, 2016 Public comments due to STN Draft
Oct 12, 2016 2016 STN  SEPA Determinations
Oct 18, 2016 2016 Zoning Code updates for Council Approval
Dec 6, 2016 2016 City Council Approval of Municipal Code Update
Dec 7, 2016 Technical Committee Approval of STN Update
Dec 31, 2016  2016 Target Date for Completion of RZC, RMC, STN
January 1, 2017 STN Update Effective Date

Important Documents

October 13, 2015 - City Council Study Session PowerPoint: Bringing Low Impact Development to Redmond:  Video:  Study Session
February 17, 2016 - Low Impact Development Feasibility Determination
                             (Department Operational Policy)
February 2016 - 2016 Stormwater Code Updates Flyer
February 23 & March 1, 2016 - Redmond Stormwater Code Updates Presentation
April 20, 2016 - City Planning Commission Study Session PowerPoint: Low Impact Development Integration:  Video:  Planning Commission Study Session
April 25, 2016 - Webinar - Redmond Zoning Code Changes
June 8, 2016 - Planning Commission Public Hearing & Study Session
June 29, 2016 - Planning Commission Report on LID Zoning Code

Contact Information

Redmond Zoning Code Amendments
Peter Holte -  425-556-2822

Redmond Municipal Code Amendments
Andy Rheaume - 425-556-2741

Stormwater Technical Notebook Updates
Steve Hitch, PE, Senior Stormwater Engineer - 425-556-2891 

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