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Project Details Information

Release Date: 2/13/2015
Contact: Kelly Davidson - Project Manager
phone: (206) 233-2785
Alternate Contact: Rodney Emmons - Resident Engineer
phone: (206) 418-9894
Work planned on: Street Light Power Project Near Seattle Center
PROJECT UPDATE (5/28/2015)

Evening and weekend work will be taking place at the intersection of 1st Avenue N and Harrison Street from May 30 at 1:45 a.m. through June 1 at 4:00 a.m. Demolition noise will coincide with this work. The Seattle City Light contractor will abide by noise ordinance requirements. During this work, 1st Avenue N will be closed from Thomas Street to Harrison Street. Metro buses will also be detoured.


Seattle City Light will convert the 480 volt streetlight power supply along the perimeter of Seattle Center to a 120-volt system. The existing 480 volt lighting system is not commonly used for street lighting by Seattle City Light and this area is one of the few remaining 480 volt systems in Seattle.

The upgrade is happening to ensure all street lights continue to work properly and safely to meet current standards and safety guidelines. The project improvements will consist of trenching and installing electrical conduit; installing electrical handholes; and replacing existing wiring. The project will also replace sidewalks and ADA curb ramps in locations designated on the map.

  • Street light improvements will ensure safety and reliability
  • Improved sidewalks and ADA curb ramps
  • Trenching in right-of-way areas
  • Sidewalk closures in locations identified on map above.
  • Temporary traffic restrictions in locations identified on map above
  • No pole replacements will take place as part of this project

The conversion has been taking place around the rest of the Seattle Center perimeter as part of the overall Mercer Corridor project. This project will complete the Seattle Center perimeter street lighting in the areas that are not included in that project. This project will start at Broad Street near the drop-off for the Space Needle and will conclude near the intersection of Republican Street and 1st Avenue North.

Schedule: Late Feb., 2015 for approximately five months.
Begin: late Feb. 2015
Duration: 5 Months
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