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Puget Sound Energy substation and transmission project

Carpenter substation and transmission project

Winter 2014 project updates
  • Construction on the transmission line started in June 2010 and was completed in November 2010
  • Construction on the substation is expected to begin in spring 2014 
Project overview

To increase electric reliability for Thurston County-area customers and meet increasing demand for power in northeastern Thurston County – including Lacey, Olympia and their urban growth areas – Puget Sound Energy plans to build a new electric distribution substation at 6140 Britton Lane Northeast in Lacey. When complete, the new substation will include one 25 mega volt ampere (MVA) transformer and have the space to add a second 25 MVA transformer, allowing PSE to double the capacity in the future without changing the substation footprint. We also plan to construct two miles of new 115 kilovolt transmission line on Draham Road Northeast and 15th Avenue Northeast in Lacey. We will be replacing the existing distribution poles along the route with taller poles to accommodate both the existing distribution line and new transmission line.


Download full-size map
Project map
(210 KB PDF)
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.

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 the information

Download these PDF files for more detail on PSE's Carpenter substation and transmission project.
Fact sheet, July 2009 (137 KB PDF)
Aerial map (355 KB PDF)
Project map (210 KB PDF)