Seattle City Light JIM BAGGS, Interim General Manager and CEO
Central Waterfront Transmission Line Relocation Project

Project Background

Project Background

Electrical transmission lines that supply Seattle’s power are suspended beneath the Alaskan Way Viaduct. Since 2008, Seattle City Light has been working to complete the full relocation of these transmission lines along Seattle’s waterfront. This Transmission Line Relocation (TLR) must be completed before the Alaskan Way Viaduct can be removed, Waterfront Seattle is constructed and new Alaskan Way is restored.

In 2012, Seattle City Light completed the relocation of a section of transmission lines along the central waterfront, moving them to a permanent location underground between Yesler Way and the Union Street substation. In October 2017, Seattle City Light completed the permanent relocation of Phase 2, the section of 115 kV transmission lines that run from Yesler Way to South King Street.

The first step toward a new waterfront

The Central Waterfront Transmission Line Relocation Project must be completed before Alaskan Way Viaduct removal. Thus, work is a vital preliminary step in the transformation of the Central Waterfront.

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