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Puget Sound Energy transmission line and substation projects

Pierce County 230 kV transmission line


2017 project updates

  • Construction is complete as of November 2017.

Project Overview

Due to current and projected customer energy use in Pierce County, the existing regional electric grid is approaching capacity, making it difficult to move power throughout the county. To help solve this problem, Puget Sound Energy built approximately 8 miles of new 230 kilovolt transmission line from the White River transmission substation in Bonney Lake to the Alderton switching station in Puyallup. Adding the new 230 kV line allows PSE to respond to the county’s current and future need for power while increasing overall reliability to our customers served by 17 local distribution substations in the central Pierce County area.

This project is related to our Central Pierce-Alderton 115 kV transmission reliability project , which involves the construction of three new 115 kV transmission lines in the Bonney Lake, Orting, and central Pierce County areas. These projects work together to strengthen the overall electric grid and increase electric reliability for our customers in Sumner, Bonney Lake, Orting and central Pierce County.

Committed to keeping you informed

PSE will continue to provide updates to the community. We will notify residents and businesses near the project area when construction will occur. We aim to complete the work with as little disruption as possible.