Gas Works Park
2000 N Northlake Way, Seattle, WA 98103

Gas Works Park in Seattle
Please click on the photo for a larger view


Under a legal agreement with the Department of Ecology (Ecology), Puget Sound Energy (PSE) and the City of Seattle (City) are developing an environmental report for the Gas Works Park site. 

The report will:
• summarize investigations and cleanup actions performed to date
• describe remaining contaminated areas that require cleanup (mainly Lake Union sediment)
• identify and evaluate alternatives for addressing the remaining areas

The report should be ready for public review in Spring 2022.

Please click on the photo for a larger view


Site Description

The Gas Works Park site is approximately 42 acres located at 2101 North Northlake Way in Seattle, Washington. It includes about 21 acres of upland property and 21 acres of property within Lake Union. Most of the upland portion of the site is owned by the City and most of the in-water portion is owned by the State of Washington.


Contamination at the site is mainly the result of historic gas manufacturing and tar refining operations. Contaminants include petroleum hydrocarbons, polycyclic aromatic hydrocarbons, volatile organic compounds, and arsenic.

Previous Cleanup Work

Under various legal agreements with Ecology over the years, PSE and the City have implemented multiple cleanup actions to address contamination in the upland portion of the site. These actions included soil removal, soil capping and groundwater treatment.

As a result, the in-water sediment portion of the site is the main area still requiring cleanup. Please click on the photo for a larger view

Please click on the photo for a larger view

Please click on the photo for a larger view


Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 139

Cleanup Site ID: 2876

Seattle, King County

Status: Cleanup Started   Get definitions of Status terminology

Lucy McInerney
Site Manager
(425) 649-7272

Brad Petrovich
Project Planner and Public Involvement Coordinator
(425) 533-5537

Document Repositories:

Northwest Regional Office
15700 Dayton Ave N
Shoreline, 98133

Fremont Public Library
731 N 35th Street
Seattle, 98103