Westcrest Park Drainage Improvements

Updated: February 16, 2021

Early 2021

We are wrapping up the bid documents to be ready for advertising. Construction is anticipated to start in spring 2021.

Seattle Parks and Recreation (SPR) is developing a plan for a 6-month temporary dog off-leash area (OLA) during the construction of the upcoming drainage, access and erosion control project at Westcrest OLA.
Photo/link to proposed plan for the temporary off-leash area.
Download the proposed plan for the temporary off-leash area

There have been ongoing drainage and erosion concerns at the Westcrest OLA, since at least 2016. SPR is proposing to undertake maintenance activities in and around the Westcrest Park OLA to address these problems. SPR will also be taking this opportunity to bring the north parking lot into compliance with current accessibility standards.

SPR is in the process of refining the design and acquiring the necessary permit. The revised design will solve the drainage and erosion issues while providing a better user experience for all users.

Construction will begin in the spring of 2020 and we anticipate completion by fall. Due to safety for all and the scope of the project, the north parking lot and the entire OLA will be closed for the duration of construction. We understand the impact the construction closure will have on the users of the Westcrest Park OLA and have developed a plan to provide temporary OLA facilities at Westcrest Park for the duration of the closure.

  • The existing small/shy dog area will remain open for use during construction. This provides additional space and continuity of current use for the OLA users.
  • We will construct a temporary OLA space on SPR property just north of the P-Patch and west of the small/shy dog area in a space that is currently lawn. This location is close to the existing small/shy dog area and is centrally located within the park. Please see the attached diagram for the location. The Temporary OLA will be located to the north of the P-Patch. It will consist of temporary fencing installed and maintained by the contractor hired to perform the work for the drainage improvements. After construction, the contractor will restore the Temporary OLA back to lawn.

Also you can find a list of all 14 Off-Leash Areas on the Dog Off Leash Areas webpage. 


Westcrest Park, 9000 8th Ave SW, 98106


The Seattle Park District Major Maintenance and Asset Management Fund provides $505,000 in funding for this project.  


Planning and Design: Spring 2018 - Winter 2020
Early 2021
Spring - Fall 2021

Project Description

The scope of the project includes:

  • Stabilizing areas of erosion on trails and down steep slopes.
  • Improving conveyance (e.g. rock-lined swales, concrete swales and HDPE piping) and outfalls to reduce potential for erosion.
  • Restricting dog and pedestrian access in sloped areas with additional fencing to reduce further loss and allow re-establishment of ground cover.
  • Regrading major use areas to reduce runoff velocities and the potential for erosion and sediment transport.
  • Stabilizing the dog play area surfaces with a well-draining mineral aggregate.
  • Constructing sediment traps to reduce transport of surfacing materials and improve water quality.
  • Relocating discharge points from tops of slopes to bottom of slope for full dispersion in the forest.
  • Providing accessibility improvements in the north parking lot and the north entrance.

Community Participation

Seattle Parks and Recreation (SPR) has determined that the project does not have a probable significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with SPR. This information is available to the public on request. The Determination of Non-Significance was issued June 3, 2019.
Download the DNS document for additional information.

October 23, 2019 Meeting - Highland Park Action Committee
SPR presented the construction project and temporary off-leash plan.

November 9, 2019 - SPR met community stakeholders at the park to discuss temporary OLA plan.