Central Waterfront Transmission Line Relocation Field Work Continues Sunday – March 17

Potholing activities outside of the Seattle Tunnel Partners work zone
This Sunday, March 17, crews will continue investigative fieldwork for Phase 2 of the Central Waterfront Transmission Line Relocation Project. This includes potholing activities inside and outside of the Seattle Tunnel Partners (STP) fenced-off work zone.

  • Crews anticipate working outside of the fence at King Street to continue potholing activities. Most of this work will be done by parking a vactor truck south of King Street and working over the top of the STP fence. There are no planned impacts to traffic or pedestrians at this location, but the work will be outside the fence and visible
Map of the work area.
Work area.


Anticipated fieldwork activities over the next several weekends:

  • Fieldwork activities will include potholing.
  • Crews will be working from 9 a.m. to 6 p.m. on Sundays.
  • Fieldwork will only happen on weekends. No weekday fieldwork is anticipated.
  • This activity is planned to wrap-up next Sunday, March 24, weather dependent.

 What is the Central Waterfront Transmission Line Relocation Project?

Transmission lines that power Seattle have historically been attached to the vulnerable Alaskan Way Viaduct. Seattle City Light has been working to complete full relocation of these transmission lines along Seattle’s waterfront in advance of viaduct demolition. City Light is ready to complete the design for permanent relocation of the final section of central waterfront transmission lines. This section of 115 kV transmission lines runs from King Street to Yesler Way (see map). Seattle City Light is working to identify a route for the transmission lines in an underground duct bank in a path just west of the existing viaduct.

For more information:

Phone: 206-499-8040

Email: CWFTransmission@seattle.gov

Web: www.seattle.gov/light/aboutus/construction/cwftransmission