Seattle City Light LARRY WEIS, 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.

Seattle City Light relocated transmission lines near the sports stadiums and Pioneer Square before the southernmost mile of the viaduct was demolished in 2010. In 2012, Seattle City Light completed the relocation of a section of these transmission lines along the central waterfront, moving them to a permanent location underground between Yesler Way and the Union Street substation. Seattle City Light is in the process of permanently relocating the final section, Phase 2, from Yesler Way to South King Street. The project is expected to be complete in fall 2017.

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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