Washington Park Arboretum Creek Water Quality Enhancements

Updated: April 30, 2020

Spring 2020

The Friends of Arboretum Creek (FOAC) are working to reunite clean, year-round water sources with Arboretum Creek.

In 2018, with support from an initial King County grant, FOAC determined the water quality in Alder and Alley Creeks is clean and available to be reunited with Arboretum Creek. Currently, this clean water is routed into the King County Sewer, which reduces needed system capacity.

This year, FOAC has expanded the organization through community outreach while coordinating with King County, The Arboretum Foundation, Seattle Parks and Recreation, Seattle Parks Foundation, Seattle Public Utilities (SPU), Seattle Department of Transportation (SDOT) and the University of Washington Botanic Gardens.


Washington Park Arboretum


In summer 2019 the FOAC applied for two grants:

  • The larger request has been approved by the King County Council - To fund a 30% design for reuniting Alder & Alley Creeks with Arboretum Creek. The exploration of initial design options will begin shortly. You can learn more about this critical opportunity to restore Arboretum Creek at Friends of Arboretum Creek.  
  • The second request has been approved by the City of Seattle Neighborhood Matching Fund (NMF). It will help develop the new website (Link Above and Below) and support further community outreach and involvement.

The Friends of Arboretum Creek plan to continue neighborhood engagement and raise funds for additional studies, restoration and outreach.

Schedule / Community Participation

Community Meeting - Given current pandemic restrictions, a community meeting will be scheduled as soon as we are able to garner input for achieving community and stakeholder consensus on a 10% design option.

News Items / Links