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Transmission choices shaped by jurisdictional constraints; Gateway West timing questioned
Summary
Stakeholders pressed Pacificorp on why the IRP shows large west‑side transmission builds and resource siting instead of earlier east‑west transfer upgrades such as Gateway West; Pacificorp said jurisdictional policy constraints (Oregon/Washington compliance) and modeling constraints drove selected transmission and timing.
Pacificorp’s technical presentation drew sustained stakeholder questioning about transmission planning and how the company decided where to locate new resources across its east and west footprints.
Why it matters: transmission siting determines which resources can reach which load centers, affects planning costs and lead times, and shapes whether renewable development occurs on the East or West side of the system.
What Pacificorp presented: the IRP identified roughly 4,250 megawatts (MW) of new transfer capability and 5,404 MW of new interconnection capacity needed across the Pacificorp service area. Pacificorp said most selected transmission and interconnection needs were associated with meeting jurisdictional…
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