Low Impact Development

Updated Stormwater Management Regulations

Stormwater Technical Notebook, Version 7A

A NEW VERSION of the Stormwater Technical Notebook, Version 7A, was approved by the City and made effective March 1, 2017. 

This new version of the notebook simplifies language regarding the requirements for Low Impact Development (LID) on-site stormwater management at new and re-developing project sites.

Stormwater Technical Notebook, Version 7, approved on December 28, 2016, adopted the 2014 Ecology Stormwater Manual, implemented low impact development requirements citywide (in compliance with the City’s NPDES permit), and provided language for use of the “special purpose zoning district“ competing needs clause within the City’s two urban centers.

Upon review, the City determined that the “special purpose zoning district” competing needs language was not needed and caused confusion. LID is required at all applicable project sites, unless it is determined to be infeasible according to the 2014 Ecology Manual’s infeasibility criteria.

LID-related Zoning Code

Amendments, were adopted by the Redmond City Council on December 7, 2016: Zoning Code

Municipal Code

NPDES-related Amendments, were adopted by the Redmond City Council on December 7, 2016:

RMC 13.06 was updated on December 6, 2016, by Ordinance 2859.

RMC 15.24 was updated on December 6, 2016, by Ordinance 2860(AM).

Additional Study in Urban Centers

The City continues to research how to best integrate LID on-site management within the City's two urban centers (Downtown and Overlake). This analysis may result in further modifications to how low impact development is implemented in those areas.

The goal of this analysis is to make better informed decisions. Redmond must continue to protect the environment and meet state stormwater requirements. We also recognize our downtown—in particular—is a complex location in which to construct development projects due to factors such as the degree of urbanization, a high groundwater table, and the fact that this groundwater supplies Redmond with a third of its drinking water. The findings of this analysis will be used to generate recommendations to our City Council and may result in additional policy direction or updates to City Code or the Stormwater Technical Notebook.

Low Impact Development Urban Centers Analysis: Description, Study Questions, and Schedule
LID Business Case Focus Group Process Map

Interested in helping with this study?

To help ensure that this analysis offers a thorough review of the topic, the City is recruiting a focus group which will include individuals who can represent various stakeholder groups.

If you are interested in potentially participating on the Stakeholder Focus Group, please let us know by emailing us at LID@redmond.gov or calling Peter Holte at 425-556-2822.

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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