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Puget Sound Energy substation project

Maxwelton substation and transmission line projects


Summer 2015 project updates

  • Island County has issued permits for construction of the Maxwelton substation, while we continue to work on the final engineering and designs for the rest of the south Whidbey transmission and distribution system improvements. The tentative construction schedule is:
    • Construct the Maxwelton substation (July 2015 to 1st quarter 2016)
    • Extend fiber optic cable from Brooks Hill substation to new Maxwelton substation on existing poles (4th quarter 2015)
    • Underground existing distribution lines along Craw Road, between Coles and Maxwelton Roads (late 2015) and on Maxwelton Road to vicinity of the high school (early 2016)
    • Upgrade an existing single-phase transmission line to a three-phase line along Maxwelton Road, south from Craw Road and extending onto French Road (3rd quarter 2016)
    • Replace the aging wood poles of the existing transmission line from the new Maxwelton substation; along Craw, Maxwelton, and Midvale Roads; then east on SR 525 to the Langley substation (late 2016)

Project overview

To increase reliability for our customers on south Whidbey Island, Puget Sound Energy plans to construct a new 25 megavolt amperes (MVA) substation, upgrade a section of our existing 115 kilovolt (kV) transmission line, underground a section of distribution line, and replace aging poles on an existing transmission line (see project map).

This is a multi-year construction effort that will be built in phases.

Whidbey Construction Map 
View full-size project map

View project information sheet

Completed projects
In 2010, we rebuilt and relocated two miles of our existing 115 kV transmission line from the intersection of SR 525 and Coles Road to a point along our existing transmission line near the intersection of SR 525 and Useless Bay Avenue.

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 transmission line?

Transmission lines are key elements in the electrical distribution system. These 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.

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.