Safety is PSE's Top Priority

We’ve learned from the recent DNV GL pipeline safety study that Energize Eastside can be safely co-located with Olympic Pipe Line Company’s pipelines throughout the existing corridor. Learn more about the study.

As the largest natural gas utility in Washington, we understand pipeline safety concerns and employ safe procedures when performing work in the vicinity of pipelines. PSE approaches every project — from the smallest natural gas service installation to the largest transmission line — with the same priority: the safety of our customers, the communities we work in, and our fellow co-workers. 

For Energize Eastside, PSE will continue to follow all federal and state safety regulations to maintain safety in the corridor. This includes building and operating the project to meet strict federal standards that govern both pipeline and transmission line infrastructure. 

In 2016, we coordinated with Olympic on the work plan and safe construction practices to replace two poles in Newcastle.

PSE and Olympic's infrastructure have safety coexisted in the corridor for decades

The backbone of our transmission system on the Eastside shares a utility corridor with Olympic Pipe Line Company's (Olympic) underground petroleum pipelines. It's been this way for more than 40 years, and co-locating utilities is encouraged by many Eastside jurisdictions.

PSE and Olympic working together

Both PSE and Olympic have a mutual interest in the continued protection and safe operation of facilities in the shared utility corridor. We have a long history of working closely together. This close coordination ensures mutual safety of our infrastructure and of neighbors adjacent to and near the corridor. A few recent examples of working together are:

  • In 2007 and 2008, PSE worked with Olympic to replace more than 130 poles and reframe more than 200 poles in this corridor and others.
  • In 2015, PSE successfully completed more than 50 geotechnical investigation borings within the existing corridor. Half of these geotechnical borings took place in the vicinity of the Olympic pipeline.
  • In June 2016, replaced two poles adjacent to the pipelines to address an imminent safety concern created by the construction of new apartments in Newcastle. We met onsite with Olympic's Damage Prevention Team to review construction activities to help ensure safe construction practices were followed. 

Focus on safety in design, construction and operations

Safety is critical to Energize Eastside’s design. Newer technology and strict safety requirements allow PSE to build to the highest safety standards, which our design will meet or exceed. Our engineers are rigorously analyzing the design for Energize Eastside to ensure safe construction and operation of the line within the shared corridor.

We’ve worked with DNV GL, a leading national expert in pipeline safety, to assist with developing design parameters to help ensure the safe operation of the co-located utilities. DNV GL confirmed that Energize Eastside can be safely colocated with Olympic's pipelines throughout the existing corridor. As recommended by DNV GL, PSE will optimize operations and improve safety by operating both lines at 230 kV within the existing transmission line corridor.

As described in the Phase 1 Draft EIS, construction will entail continued close coordination between PSE and Olympic and no significant adverse impacts related to work near pipelines are expected. The EIS process is led by the City of Bellevue in coordination with the cities of Kirkland, Newcastle, Redmond and Renton. To learn more about corridor safety in the EIS, visit

Review our corridor safety fact sheet to learn more.