Pyramid Peak at Skagit Hydroelectric Project, Photo by Jim Hunter
Seattle City Light JIM BAGGS, Interim General Manager and CEO
Denny Substation Project
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Utility Work to Impact John Street and Pontius Avenue N

Crews have closed John Street to thru traffic between Minor Avenue N and Yale Avenue N to install duct bank and to perform other utility work for the Denny Substation. The closure is scheduled to be in place around the clock for up to four months. The John Street and Pontius Avenue N intersection will also be closed for up to two months.

Construction Details


  • Planned word dates:  December through early April
  • Work hours:  7 a.m. to 5 p.m. Monday through Friday, with the possibility of some Saturday work. The closures will be in place 24 hours a day, seven days a week.
  • Road closures:  No thru traffic on John Street between Minor Avenue N and Yale Avenue N; John Street and Pontius Avenue N intersection will be closed
  • Pedestrian closures:  Because the crosswalk across Pontius Avenue N at John Street is closed, a mid-block crossing of Pontius has been provided. The sidewalk on the south side of John Street between Minor Avenue N and Yale Avenue N is also closed.

JOHN/PONTIUS CLOSURES



Denny Network


The Denny Network Project reached a key milestone in the third quarter of 2017 with the installation of the last of 30 underground vaults. With vault installation completed, the project’s focus now is on duct bank installation and roadway restoration.

Over the next month, the Denny Network Project is working in the following areas of the South Lake Union neighborhood:
  • Republican Street between 9th Avenue N and Terry Avenue N
  • Republican Street and Pontius Avenue N intersection
  • Harrison Street and Minor Avenue N intersection
  • Harrison Street between 9th Avenue N and Boren Avenue N
  • Thomas Street between Pontius Avenue N and Minor Avenue N
  • Thomas Street and Boren Avenue N intersection
  • Fairview Avenue N between Thomas and John streets
  • 9th Avenue N between Mercer and Republican streets
Crews have also begun work on street improvements along Thomas Street between Pontius Avenue N and Minor Avenue N, which includes a festival-style street design, new street and pedestrian lighting, water permeable sidewalks, and additional trees and landscaping.

What to Expect During Network Construction

  • Closures of sidewalks and crosswalks should be expected in work areas
  • Business and pedestrian access will be maintained wherever possible
  • Lane restrictions and some traffic and pedestrian detours
  • Typical weekday work hours from 6 a.m. to 7 p.m.
  • Some weekend, night, and early morning work
  • Noise and vibrations during high-impact work



Updated: December 2017


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Project Hotline:
(206) 257-2142

Email Address:
SCL_DennySub@seattle.gov

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