2020 Water Quality Retrofit Project

Project Location

Three locations within Burien:

  1. 8th Ave S near S 138th Pl
  2. S 165th St and Des Moines Memorial Dr S
  3. S 169th Pl and Ambaum Blvd S

Project Overview 

This project consists of the installation of four hydrodynamic separator water quality vaults at three locations within Burien, near where stormwater outfalls exist with no current water quality treatment prior to discharge to local creeks. All work is to be completed within the public right-of-way. 

Work will include potholing for utilities, clearing, installation of temporary erosion control measures, removal of existing storm drainage, and installation of water quality facilities and associated storm drain pipe.


Map of project locations.

Project Status

Scheduled Start Date: End of November 2020 (construction)
Scheduled Completion Date: January 2021 (est. pending weather)

Neighborhood Impact 

All work is to be performed within the public right-of-way. There will be some traffic disruption at various times of day. Please consider alternate routes or expect delays. Several residential driveways adjacent to the work sites will be impacted temporarily. Those affected property owners will be contacted prior to start of work to communicate the project schedule and anticipated disturbances.

Project Manager: Dan O’Brien

Construction Manager: Brian Victor

General information: 206-241-4647

Contractor: Northwest Cascade, Inc.