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 (manual), 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.
The deadline for providing comments on the existing (2004) manual has passed. The next opportunity to provide comments will be in April and May 2018, after the public review draft of the revised (2018) manual is released.
Sign up for email updates at the
STORMWATER-EASTERN-WA Home Page.
Opportunities to review and provide input:
Content update – key changes
- Update the Underground Injection Control section — Chapter 5.6
- How to determine appropriate treatment techniques
- Correct and refine spill containment section
- Correct and refine oil control section
- Update existing BMP guidance
- Update Core Element #2 & Construction Stormwater Pollution Prevention Plan to meet requirements in latest Construction Stormwater General Permit
- Incorporate appropriate sections/best management practices from the Eastern Washington Low Impact Development Guidance Manual
- Add consistency with the Stormwater Management Manual for Western Washington — where appropriate
- Move to an electronic format
Public meetings
- Jan. 8, 2016 — Initial kick-off meeting
- June 27, 2017 — Project webinar