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​Umatilla Load Interconnection Capability

​To support the broader economic development goals of the region, BPA is seeking to better understand local economic development priorities and inform customer and stakeholder decisions by pro-actively providing information about BPA’s local load-service capabilities.

The Umatilla Load area is centered in Morrow and Gilliam Counties in Oregon State and includes the city of Boardman and extends to Arlington to the west and Ione/Heppner to the south. This area is largely rural but has seen an influx of renewable generation interconnection interest as well as large load growth.

The Umatilla cutplane is defined as:

  • McNary – Morrow Flat 230 kV lines 1 & 2
  • Morrow Flat – Jones Canyon 230kV; including Dalreed load
Utilities in the Umatilla Load Area include
  • Columbia Rural Electric Association
  • Umatilla Electric Cooperative

Recent and Potential Project in the Umatilla Area
​​Planned projects to reinforce Boardman Center load service:
  • 2nd Morrow Flat 230/115 kV Transformer
  • Capacitor Addition at Morrow Flat 115 kV
  • Jones Canyon 230kV Substation Reactor Addition
Existing Transmission System Limit for the Umatilla Load Area

​1170 MW

The following graph depicts key data points that may help inform initial feasibility questions related to the new large load addition. You will find:
  • The most limiting season
  • Historic peak load information
  • Forecasted load 10 years out
  • Load area with system average load growth
  • Aggressive Load growth scenario (if applicable) depicts all queued load coming online in the 10 year planning horizon
  • Local Load Area Capability



For questions, please contact interconnection@bpa.gov