Stormwater Management Manual for Eastern Washington
2018 update to the Stormwater Management Manual for Eastern Washington
Ecology is supporting and leading the effort to update the 2004 Stormwater Management Manual for Eastern Washington, as it has been over 10 years since the manual was written.
In early 2016, a steering committee comprised of Eastern Washington permittees and secondary permittees was convened. The steering committee helped to identify and set priorities for the project, as well as review proposed content changes for the manual update.
Those not on the steering committee can participate by reviewing and commenting on draft documents/language and participating in public meetings and webinars.
Project mission
The mission of the project is to:
“Complete a focused update of the manual via an open and collaborative process to include the latest advances in stormwater management, needed clarifications, and improved ease of use.”
Project objectives
- Complete a focused update of the manual
- Employ an open and transparent public process
- Work closely with the Eastern Washington Steering Committee and stormwater professionals
- Promote public participation to solicit feedback
- Improve adoption and use of the manual
- Provide a user-friendly, on-line version of the manual
Learn more and help us improve the manual
The 2018 manual will guide stormwater management in Eastern Washington for years to come. Your input will help us create guidance that protects water quality while being useful and applicable to Eastern Washington communities.
We're accepting comments on the draft 2018 manual until 11:59 p.m. on July 25, 2018.
You may provide comments on the
2018 draft of the manual by emailing
SWPermitComments@ecy.wa.gov. You may use
this comment spreadsheet (Excel) to organize and submit your comments (preferred method).
We also have the
Track Changes version of the manual and the
Figures from the manual as separate documents.
See upcoming public meetings
Read our
Spring 2018 Manual Update Newsletter.
Sign up for email updates at the
Stormwater-Eastern-WA homepage.
Opportunities to review and provide input:
Content update — key changes
- New flowcharts to clarify new development and redevelopment requirements in Chapter 2
- Updated Best Management Practices (BMP) template for chapters 5 and 6
- Updated Soil Suitability Criteria
- Clarified and streamlined the Underground Injection Control (UIC) Guidance
- New flow control and runoff treatment BMPs
- New source control and construction BMPs in chapters 7 and 8
- Updated dispersion BMP design guidance
- Updated infiltration rate determination guidelines
- New site planning principles and design strategies appendix
- Updated planting recommendations
- Move to an electronic format
Public meetings
- Jan. 8, 2016 — Initial kick-off meeting
- June 27, 2017 — Project webinar
- June 12, 2018 — Public meeting in Spokane, WA
- June 26, 2018 — Public meeting in Richland, WA
- July 10, 2018 — Webinar