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Project Details

East Union Street Underground Conversions

Posting Date: 12/13/2016                

Contact: Susan Kallies - Seattle City Light Resident Engineer

Phone: (206) 684-7265

PROJECT UPDATE (7/18/2017):

Seattle City Light's contractor, Pellco Construction, has completed the final pavement restoration work along East Union Street and 11th Avenue. 

11th Avenue Between East Pike Street and East Union Street

Seattle Department of Transportation (SDOT) will be making sidewalk improvements on the west side of 11th Avenue for improved pedestrian mobility and a low speed vehicle environment. Restoration will include a wider sidewalk and curb ramp.

Learn more about the design concept plan: 10th and 11th Avenue Street Design Concept Plan 

For more information on the sidewalk restoration work, please contact Susan McLaughlin, SDOT Urban Design at (206) 733-9649 or


A Seattle City Light contractor will be working in the Capitol Hill neighborhood to install underground electrical conduit, vaults and associated equipment in parts of East Union Street from 10th to 11th Avenue. This work is aligned with the City of Seattle’s ordinance to underground power lines in this area.


Note: Overall project zone depictedWork impacts will be phased and active work areas will be updated within this footprint.


  • Completion of this work will allow for a more reliable power system.
  • This work is needed to meet the City of Seattle’s ordinance to underground power lines in this area.


  • Phases of work will include temporary travel lanes, parking lane, sidewalk and bike lane impacts. 
  • Trenching will occur along East Union Street and segments of 10th and 11th Noise is expected from heavy equipment and jackhammering.
  • Access to businesses will be open at all times.
  • There will be parking restrictions as trucks are staged on site during work hours. Excavated areas will be covered over with steel plates during non-work hours.
  • Maintenance outages are required to do the work safely. Customers will be notified in advance of any outage.

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Construction Start: Week of January 9, 2017

Duration: Estimated for completion in July 2017

Daily Work Schedule: Mondays to Fridays from 7:00 a.m. to 4:30 p.m.

Alternate Contact: Susan McLaughlin - SDOT Urban Design

Alternative Contact Phone: (206) 733-9649

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