Current project phase: Ongoing
Project Manager: Molly Reed
PSE is upgrading our three substations on Bainbridge Island to improve electric reliability and capacity for the Murden Cove – Winslow 115 kV transmission line. To provide safe, reliable energy during construction, we are working on one substation at a time. We plan to follow this general construction schedule:
This schedule could change, depending on permit approvals and the progress of construction. Please read on for more information about construction at each substation.
COMPLETE
In 2023 and 2024, we replaced aging equipment at the Port Madison Substation to improve reliability, better protect equipment and allow for remote control of the distribution system.
Substation facts:
In 2025 and 2026, we are upgrading the Murden Cove Substation to support the new Murden Cove – Winslow 115 kV transmission line. These upgrades include installing a second transformer to provide electric capacity to meet the current and future energy needs of Bainbridge Island residents, businesses and Washington State Ferries.
Substation facts:
Serving approximately 5,300 customers
Originally built in 1979
We plan to upgrade the Winslow Substation in 2028 and 2029 to support the new Murden Cove-Winslow 115 kV transmission line. We will provide more information as construction approaches.
Substation facts: