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Project Details

Roy Street Loop (SE of Lake Union)

Posting Date: 12/19/2017                

Contact: Mark Green - Crew Chief

Phone: (206) 735-0321

PROJECT UPDATE (2/27/2018)

Crews have resumed work and are approximately 10% complete.


Seattle City Light crews plan to enhance electrical reliability for customers in an area southeast of South Lake Union. The new underground electrical facilities are designed to connect customers with the Denny Substation network system. The project is scheduled to begin in mid-January 2018.

City Light crews will install three (total) new electrical vaults and a new duct bank system for underground conduit. See the map below for Phase 1.

At a future date, this project will include similar work in these additional phases: a street crossing at Minor Avenue North and Valley Street; work along the length of Roy Street between Fairview Avenue North and Minor Avenue North; and work on Minor Avenue North, for approximately 40 feet, to the north of its intersection with Valley Street. The sequence of these additional phases will need coordination, so will be communicated at a future date.


This is a map of the construction zone for the Roy Street Loop project


The project will increase electrical reliability since the area will have power from the network system.


During Phase 1, the crews will install the first vault on the northeast end of Minor Avenue North between Valley and Roy streets. They then will work south to the intersection of Minor Avenue North and Roy Street for the installation of a second vault. See map.

  • There are no power outages expected during the duration of the project.
  • During Phase 1, approximately 10-12 parking slots (total) will first be taken on the north end of Minor Avenue North on both sides of the street and on the north side of Valley Street near its intersection with Minor Avenue North. As Phase 1 progresses to the south those slots will be released as soon as possible, but a similar number of spaces will be taken further south on Minor Avenue and on Roy Street. See map.
  • During Phase 1, a single lane of traffic and local access will be maintained. Uniformed police officers will be on hand to assist with traffic and pedestrian access.
  • Customers can expect noise to occur especially at initial parts of the work.



Construction Start: Mid-January 2018

Duration: Phase 1: Four months

Daily Work Schedule: 9 a.m.-3 p.m., M-F; & 9 a.m.-6 p.m., Sat.-Sun.

Alternate Contact: -

Alternative Contact Phone:

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