Denny Way Lane Closures between Stewart St and Minor Ave begin at 11 p.m. tonight

From Seattle City Light: 

Lanes on westbound Denny Way between Stewart Street and Minor Avenue will be closed to install a water main beginning at 11 p.m. Friday, July 22 and continuing until 5 a.m. Wednesday, July 27 as follows:

  • Friday, July 22

11 p.m. to Saturday at 5 a.m.  – Both westbound lanes will be closed

  • Saturday, July 23

9 a.m. to 3 p.m. – One westbound lane will be closed

11 p.m. to Sunday at 5 a.m. – Both westbound lanes will be closed

  • Sunday, July 24

9 p.m. to Monday at 5 a.m. – Both westbound lanes will be closed

  • Monday, July 25

9 p.m. to Tuesday at 5 a.m. – Both westbound lanes will be closed

  • Tuesday, July 26

9 p.m. to Wednesday at 5 a.m. – Both westbound lanes will be closed


When both lanes are closed, westbound traffic on Denny Way will be detoured southwest on Stewart Street to Boren Avenue, northwest on Boren Avenue to Fairview Avenue, then north on Fairview Avenue to Denny Way.

Project Background: As part of the Denny Substation Program, Seattle City Light is building a new substation (Denny Substation) and underground electrical distribution network (Denny Network) and designing a transmission line (Denny-Massachusetts Transmission Line) that will ensure more reliable power delivery to customers in and beyond the South Lake Union and Denny Triangle neighborhoods. The new substation, located on Denny Way near Stewart Street, will be City Light’s first and largest substation in 30 years. The Denny Substation Program will increase system-wide reliability and operational flexibility, achieving a major electrical system upgrade for the city of Seattle.

For further information, visit the project website at:

Project Hotline: (206) 257-2142

Email Address: