Glenwood Substation

The Glenwood Substation is key piece of infrastructure that will power the bright future of Glenwood. It will convert high-voltage electricity down to a voltage that can be distributed throughout the city.

A crane positions a 118,000-pound transformer at SUB’s new Glenwood Substation.

Once operational, this substation will support the approximately 800 existing residential and business customers in Glenwood, add capacity for additional development of residential neighborhoods and businesses in the area, and provide extra resiliency to adjacent neighborhoods in Springfield, including West Centennial and Downtown.

SUB line crews will now begin construction the transmission line along I-5, planned for late spring, 2025. This will connect our existing 115 kV transmission line to the new substation.

This project is part of our commitment to ensuring reliable, efficient energy for our community as it continues to grow. Our goal is to make the substation fully operational in 2026.

Stay tuned for more updates as we move closer to energizing this new addition to our grid!

Workers checking placement of large transformer.
Positioning the transformer is exacting work.

Timeline

2000                      SUB acquires Alvey-Springfield 115kV transmission line from BPA

2001                      SUB acquires Glenwood territory from EWEB

2012                      City of Springfield adopts Glenwood Refinement Plan

2015                      SUB acquires Papé property for future substation site

2023                      SUB breaks ground on the substation

2024                      Transformer is delivered

2025                      Transmission-line construction set to begin

2026                      TBD: Substation complete and energized

Workers assemble the parts of the new tra nsformer of the Glenwood substation
After delivery, further assembly is completed onsite. Radiators and fans that cool the transformer are attached, as are bushings (the white corrugated cylinders), which allow power to enter and exit the transformer. Arresters (the black corrugated cylinders) are added to protect the transformer from high-voltage surges, such as lightning strikes.

Additional Facts:

  • This is SUB’s 9th substation
  • The substation will initially include 3 backbone feeders (major distribution lines that deliver power around town)
  • The transformer was built to SUB’s specifications and weighs 117,960 pounds
  • It took a year to build and a week to travel from the East Coast to Oregon