Puget Sound Energy electric transmission project
Sammamish – Juanita 115 kV transmission line
Fall 2009 project updates
- Puget Sound Energy held a second community meeting on May 19 to discuss the proposed routes for a new transmission line connecting our Juanita and Sammamish substations
- PSE anticipates holding a third community meeting in fall 2009
- We expect to begin construction of the transmission line in 2011
Project Overview
PSE plans to construct approximately 4.5 miles of 115 kilovolt (kV) transmission line from our Sammamish substation (located at 9221 Willows Rd. NE in Redmond) to our existing 115 kV line that currently terminates at 132nd Street between 109th Avenue NE and 110th Avenue NE in Kirkland, near our Juanita substation. PSE has not yet determined the specific route of our new transmission line, but anticipates that much of the new line will be located in and along public road rights-of-way.
We are building the new transmission line to increase the reliability and capacity of the electric system in the area. Currently our Juanita substation, as well as two other substations serving the Kirkland area, is served by a single transmission line. Under certain conditions, transmission lines can be damaged by storms or overload, resulting in loss of service to customers. Our new transmission line will provide additional transmission system capacity and redundancy to improve our system reliability as a whole, and reduce the possibility of system outages.
What is a transmission line?
Transmission lines are key elements in the electrical distribution system. The lines safely transport high voltage electricity from power generation sources like dams and wind farms to substations in local communities. Transmission normally takes place at voltages of 55 kV and higher.
Committed to keeping you informed
PSE will continue to provide updates to the community. We will notify residents who live near the project area when construction will occur. We aim to complete the work with as little disruption as possible.
Download the information
Download these PDF files for more detail on PSE's Sammamish-Juanita 115 kV electric transmission line project.
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