Washington Park Stormwater Tank Maintenance

Aerial image of SPU’s stormwater detention tank in Washington Park.
Aerial image of SPU’s stormwater detention tank in Washington Park.

Project Description

Seattle Public Utilities (SPU) owns and operates a stormwater storage tank in Washington Park near the Washington Park Playfield.

In 2021, SPU contractor crews will perform a maintenance upgrade project to improve the way this facility manages flows during rain events.
This work will improve SPU's ability to monitor and control stormwater flows and allow us to use our existing infrastructure more efficiently.

Location

SPU's stormwater storage tank is located near the Washington Park Playfield in the southern portion of Washington Park near E Roy Street, 29th Avenue E, and E Madison Street.

What's Happening Now?

The contractor is continuing to perform maintenance upgrades to the belowground storage tank in Washington Park and do some aboveground work, which included trenching of a small section of the lawn to install instrumentation that connects to the tank.

Once the upgrades are complete, SPU will inspect and test all of the equipment and then perform an operational testing phase.

Following successful operational testing, the contractor will complete any remaining miscellaneous activities, landscape restoration in the park, and demobilize from the site. Construction is expected to be completed early fall, 2021.

To receive updates about this maintenance project, please sign up for the project email list.

Community Benefits

SPU is performing this work to enhance the functionality of the stormwater tank and to improve SPU's ability to manage flows more efficiently while improving regional water quality.

Anticipated Impacts

Construction activities will be limited to the area of Washington Park closest to the stormwater storage tank, and much of the work will be performed belowground in the storage tank. However, there will be some aboveground activities and impacts to nearby residents and businesses as well as park users.

  • Crews to work 8 to 10-hour days Monday through Friday. Work hours and days may vary based on work being preformed, and night or weekend work may be required later in construction.
  • Construction noise, dirt, dust, and vibrations
  • The section of Washington Park south of the Washington Park Playfield will be closed off
  • The pedestrian paths in Washington Park that connect to E Madison St and to the intersection of E Roy St and 29th Ave E will be blocked throughout construction.
  • Increased construction traffic in the southern section of Washington Park near E Roy Street, 29th Avenue E, and E Madison Street
  • Staging of large equipment near the construction site
  • Once the work is complete, SPU will restore vegetation and landscaping impacted by construction activities.

Community Engagement

If you're interested in receiving updates about this maintenance project, please sign up for the project email list.

Schedule

Late 2020

  • SPU awarded the contract and worked to bring the Contractor onboard

Early 2021

  • SPU and Contractor perform pre-construction activities
  • Construction begins in mid-May

Late 2021

  • Work scheduled to be complete by late summer / early fall
  • Following construction completion, SPU contractor crews will perform site restoration

Project Documents