City of Bellingham
Stormwater Management Manual for Western Washington (Ecology 2024; city MS4)
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Compare each cited field to the official PDF before relying on it. What this means
Municipality coverage via Ecology SWMMWW (Everett/Olympia pattern). City may publish a local drainage manual separately.
Other manuals in Washington: City of Bellevue, City of Everett, City of Kennewick, City of Lacey, City of Olympia, City of Seattle, City of Seattle, City of Tacoma, City of Vancouver, King County, Spokane County / City of Spokane / City of Spokane Valley, Washington, Washington State Department of Transportation (WSDOT)
Document Metadata
Jurisdiction level
City
No evidence cited
State
Washington
No evidence cited
Version / edition
2024 Edition
No evidence cited
Adoption / effective date
2024-07
No evidence cited
Last revised date
2024-07
No evidence cited
Relationship to state manual
adopts state manual directly
“adopts_state_manual_directly — Ecology SWMMWW 2024”
Coverage note
Design Criteria
Design storm return periods (years)
2-year, 10-year, 25-year, 50-year, 100-year
No evidence cited
Water quality volume method
Adopts Ecology SWMMWW Minimum Requirements including runoff treatment and flow control; continuous simulation (WWHM/HSPF) sizes flow control. Local stormwater code supplements SWMMWW.
No evidence cited
Peak flow calculation method(s)
Continuous Simulation Models, WWHM / HSPF, Single Event Hydrograph Method
No evidence cited
Hydrologic/hydraulic software
WWHM, HSPF
No evidence cited
Approved BMP categories
Flow Control BMPs, Runoff Treatment BMPs, LID BMPs, Source Control BMPs, Infiltration / bioretention
No evidence cited