Mason County PUD No. 3 recently provided an update on its Belfair electrical upgrade project to increase resiliency, reliability, and capacity for North Mason, Washington, customers.
“This upgrade will enhance service reliability for current customers and support additional residential, commercial, and industrial development in the area,” the Washington State-based PUD said in its Summer 2025 newsletter.
Work is currently underway at the site of the former Belfair Warehouse, where a new switching station will strengthen the connection to BPA’s transmission lines and prepare for future growth in the Belfair Urban Growth Area.
On June 11, 2025, the original 72,000-pound transformer from 1967 was lifted out of the Belfair substation by crane. In its place, a new, higher-capacity transformer was installed in July 2025.
The third phase of the project involves construction of a new 3.6-mile, 115 kV transmission line from the PUD's new switching station to the site of a future substation near the Belfair Water District's water tower.
The fourth and final phase of this multi-year project will be to construct a new high-capacity substation near the Belfair Water Tower to serve upcoming development in the Log Yard Road area and on land that will be opened by the future WSDOT Belfair Freight Corridor project.
This new substation will also allow PUD 3 to re-route power to Belfair and Tahuya in emergency situations if there are issues on the primary transmission line.
