Georgetown Flume Off-Leash Area Development

Updated: June 8, 2021

Spring 2021

The Flume property is in the final stages of being transferred from Seattle City Light to Seattle Parks and Recreation (SPR) and Seattle Department of Transportation (SDOT). The related street vacation and final council ordinance to transfer ownership should occur in summer 2021. The SDOT trail timeline (for the segment on this property) has been accelerated and will be combined into one larger public works construction project to improve project coordination (between the trail and the off-leash area), reduce impacts on the facilities during construction and align the project completions. 


1035 South Myrtle Street, 98108


Seattle Parks and Recreation - $400,000 from identified sources. SPR will provide off-leash area design, pavement removal, fencing, pedestrian circulation, water supply to the site, signage, waste receptacles, tree maintenance, and the surface water bioswale (shared with SDOT.)

Seattle City Light - $3,800,000
SCL will provide the property and the cost of grading and preparing the surface.

Seattle Department of Transportation - $400,000 (from identified sources)
SDOT will provide curbs and sidewalks on S. Myrtle St and East Marginal Way S., paving and marking for trail, electric power to the site, pedestrian lighting, 20 trees for the Off-Leash Area, and the surface water bioswale (shared with Parks.)


Planning: Spring 2020 - Fall 2020
Design and Permitting:
Winter 2020/2021 - Winter 2021/2022
Construction: Spring 2022 - Winter 2022/2023

Project Description

The Flume site, currently owned by Seattle City Light (SCL), was the historic site of the conveyance that transported water from the Duwamish River, to the Georgetown Steam Plant until it ended operation in 1975. SCL is offering the eastern piece of this property to Seattle Parks and Recreation (SPR) and the western piece to Seattle Department of Transportation (SDOT) as part of a public benefit package in exchange for a street vacation SCL has proposed for a segment of Diagonal Avenue South. SCL will fund the environmental remediation of the site, including removal of contaminated soils. After the property is transferred, SPR and SDOT will each develop their property through independent projects.

The eastern portion of the site will be owned and maintained by SPR and developed into a new off-leash area. This project will also build a surface water bioswale to be shared with SDOT. 

The western portion will be owned and maintained by SDOT and developed into a shared use path for those walking, biking, or rolling between Georgetown and South Park. For more information on SDOT's Georgetown to South Park Connection, please visit their website.

The site will be inaccessible until construction is complete.

For other off-leash areas in Seattle please visit

Community Participation

Learn about the new off leash area and participate in the public process as we work together to design your new park space.

Thank you to everyone who participated in the online survey which closed in July 2020. Your input is appreciated.
Download the Survey Summary here:

Georgetown Open Space Committee ZOOM Meeting 6/22/2020