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Puget Sound Energy natural gas projects

Alaskan Way Viaduct and Seattle area projects


Spring 2015 project updates

Seawall-related projects
  • We currently have no Seawall-related natural gas projects underway.
12-inch natural gas main relocation project
  • PSE's natural gas contractor, Michels Corporation, completed installation of the new pipeline (see project route) in late September 2013.
  • PSE's natural gas contractor, InfraSource, will be conducting remediation activities for distribution pipelines in downtown Seattle through 2015.
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Project Overview

In conjunction with Washington State Department of Transportation's (WSDOT) Alaskan Way Viaduct Replacement Program and several other Seattle-area transportation projects, Puget Sound Energy is working to relocate, reconfigure and protect segments of natural gas pipeline in areas of downtown Seattle to ensure continued public safety and customer reliability.

The Alaskan Way Viaduct Replacement Program, Waterfront Seattle and Seawall Project are collectively the largest set of associated projects to take place in the Puget Sound region in several decades. Additionally, there are six other Seattle-area transportation projects planned to take place over the next several years; many of these projects require relocation of utilities, including PSE's natural gas system. These projects are driven by the City of Seattle, Sound Transit, Washington State Department of Transportation, the Port of Seattle and the U.S. Army Corps of Engineers.

PSE is working closely and proactively with all the jurisdictions and agencies to ensure the continued safety and reliability of our existing natural gas system in the area.

For information on these projects, visit the websites:

Alaskan Way Viaduct Replacement Program

Seattle Department of Transportation

Waterfront Seattle and Seawall Project


At PSE, we know our customers, employees and the communities we serve expect to live and work around a safe and reliable natural gas system. Safety is our top priority when it comes to designing, constructing, operating and maintaining the natural gas system serving more than 770,000 PSE customers. When operating our system, we meet or exceed strict federal and state safety requirements related to pipeline safety. Click here for more information on natural gas safety.

How does natural gas get to my home or business?

Natural gas is a fossil fuel composed almost entirely of methane. Interstate pipelines transport natural gas to regional natural gas systems, where it is metered and delivered through a network of local mains, service lines and, ultimately, to customer homes and businesses. View How Natural Gas Gets To You or check out PSE's Source to Stove video.