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Puget Sound Energy pole replacement program

Kittitas County transmission pole replacement program

Fall 2011 project completion
  • Our pole replacement work in Kittitas County began in May 2011 and was completed in November 2011 
Project overview

PSE routinely inspects the transmission and distribution system throughout our nine-county electric service area and identifies equipment, including poles, in need of replacement. This maintenance work is necessary to ensure continued reliable electric service to our customers.

This year, we replaced approximately 220 transmission poles in Kittitas County (see map). We replaced poles on four different transmission lines, including:

  • Approximately five poles along our 115 kilovolt line between our Cle Elum switching station, located at the intersection of Jackson and Main streets in Cle Elum, and our Kittitas switching station, located at the intersection of Pierce Street and Railroad Avenue in Kittitas;
  • Approximately 45 poles along our 115 kV line between our Cle Elum switching station and our Hyak distribution substation, located at 23400 716th Ave. SE on Snoqualmie Pass;
  • Approximately 113 poles along our 230 kV line between our Cascade transmission substation, located at 1980 SR 903 in Cle Elum, and the Rocky Reach generating station, located on the west side of the Columbia River near Wenatchee in Douglas County, and;
  • Approximately 57 poles along our 230 kV line between our Cascade transmission substation and our White River transmission substation, located at 2120 Lakeland Hills Way in Bonney Lake, Pierce County.

We also performed other routine maintenance work on the poles, including replacing a variety of electrical equipment.


Download full-size map

Project map

Contact us:

For more information on this project, e-mail or call Molly Reed, project manager, at 425-462-3933.

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 generating facilities to substations in local communities. Transmission normally takes place at voltages of 55 kV and higher.

What is a substation?

Substations are critical links in the electricity distribution system, containing utility circuit protection, voltage regulation, and equipment that steps down higher voltage to lower voltage. Before reaching homes and businesses, power is routed through our transmission system to a substation where it is changed to a lower voltage that can be utilized by customers.

What is a switching station?

A switching station is a transmission substation where the utility can switch or reroute power flow from one line or path to another to allow the power to be isolated to clear a fault (e.g., a fallen tree in the wires) or to take the power line out of service for maintenance. It also may act as a point of interconnection between two different transmission operators (e.g., Bonneville Power Administration and PSE). Unlike a substation with a transformer service neighborhood circuitry, switching stations do not step power up or down; they integrate power from one or more transmission sources on the regional and local grid to serve neighborhood substations.

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.

Download information

Download these PDF files for more detail on PSE's Kittitas County pole replacement program.
Project map