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Puget Sound Energy natural gas projects

Alaskan Way Viaduct Replacement Program and Seattle area projects

Spring 2014 Project Updates

12-inch natural gas main relocation project
  • Brick restoration along Occidental Ave South between South Main Street and Yesler Way is over halfway complete! Work hours are between 8 a.m. and 5 p.m., Mondays through Fridays as well as some weekends. Work is expected to be completed in June.
  • PSE’s natural gas contractor, Michels Corporation, completed installation of the new pipeline (see project route) in late September 2013. Work began in July 2013.
Other Projects
  • PSE’s natural gas contractor, InfraSource, will be conducting remediation activities for distribution pipelines in downtown Seattle through 2014.
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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 plans to relocate, reconfigure and otherwise protect segments of the existing natural gas pipeline in areas of downtown Seattle to ensure continued public safety and customer reliability. On July 30, 2013, boring of the new SR 99 tunnel began.

The Alaskan Way Viaduct Replacement Program, Elliott Bay Seawall Project and Waterfront Seattle 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 five 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.

For information on the Alaskan Way Viaduct Replacement Program please visit these Web sites:
Washington State Department of Transportation
Seattle Department of Transportation

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.


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 750,000 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.