Design

The Energize Eastside project is designed to meet the Eastside’s growing need by upgrading the transmission lines, installing new steel poles, and building a new substation. 

Based on community feedback and what we’ve learned through the environmental review process, our current design:

  • Uses the existing corridor as much as possible, avoiding new corridors and sensitive areas.
  • Replaces the four existing poles with one or two new poles.
  • Increases the distance between new poles and the Olympic pipeline.
  • Typically locates new poles in the same or similar locations as existing poles.
  • Does not condemn any homes.
  • Will be safe and better than what we have now.

While the final design and alignment are not yet determined, we anticipate using steel monopoles made of galvanized or self-weathering steel. We are looking at several pole design options, most of which range from 85 feet to 100 feet above ground. In some instances, poles could be as short as 65 feet, while others may need to be taller, such as when crossing a highway.

We anticipate the wire (known as a conductor) will most likely be a single 1590 ACSS conductor per phase. The diameter of this conductor is 1.545 inches comprising of a stranded steel core and outer layers of stranded annealed aluminum.