Seattle City Light is planning to move existing facilities and add electrical vaults in preparation for future construction to replace the SR 99 Alaskan Way Viaduct. The north portal of the planned bored tunnel would affect major power lines (feeders) that are underground and overhead at Harrison Street and Aurora Avenue N.
Existing underground feeders will need to be rerouted south on Taylor Avenue N. to John Street then east on John Street to Aurora Avenue N. then north on Aurora to Harrison Street to reconnect the existing circuits. City Light will be performing the civil construction work (excavating and building the new duct bank and setting a new vault) on Taylor Avenue North between Broad Street and Thomas Street. The utility also will be installing a vault over energized duct banks on Harrison Street west of Aurora Avenue North. The rest of the civil construction work will be performed by WSDOT's contractor.
The electrical phase of the project will follow. Since that involves pulling cable though conduit, it has a much smaller impact on customers.
11/20/2012 Update:Our electrical crews have stopped pulling cable until December and are now splicing cable during daytime hours.