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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 (10/22/2018)

Crews are beginning work on a new section of the Roy Street Loop project. In this phase, crews will be cutting and breaking street pavement on Valley Street to install a new set of underground conduits (duct bank). Previous work planned at the northeast corner of the intersection of Valley Street and Minor Avenue North will be addressed at a later point in time. See the map below for construction details on this phase.


Seattle City Light crews are taking steps 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. City Light crews will install three (total) new electrical vaults and a new duct bank system for underground conduit.

This Roy Street Loop project will include work in two additional phases:a street crossing on the east side of the intersection of Minor Avenue North and Valley Street and work on the north side of Valley
Street. The sequence of these additional phases will need coordination, so will be communicated at a future date.


Map of Phase Three: Roy Strret Loop


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


  • There are no power outages expected during the project.
  • During Phase 3, parking, travel and pedestrians will be affectedas shown on the map above.
  • Customers can expect noise from saw cutting and breaking concrete in the initial parts of the work. The noise will lessen as the work transitions to excavation.
  • Police officers will be onsite to help with local access on Roy Street should it be required.


Construction Start: Phase 3: early October

Duration: Phase 3: Estimated 30 days

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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