ProjectRegional context
Big Eddy-Chemawa 230/500 kV Line Upgrade
About this record
BPA transmission project. A project record with the source’s own status, dates and estimates. A proposal or connection request does not establish operation.
2026-07-29
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BPA transmission project
Bonneville Power Administration - Portfolio cycleBPA’s planned transmission upgrades, with published status, cost estimates and expected dates.Definition ↗
- GERP 1.0
- Status
- Scoping(filed as “SCOPING”)
- Expected energization
- 2033
- Bundle
- BIG EDDY-CHEMAWA-1 500KV LINE REBUILD
BPA proposes to rebuild 91 miles of the existing Big Eddy-Chemawa #1 230 kV line to 500 kV line and re-terminate between BPA’s Big Eddy Substation (The Dalles, OR), Ostrander Substation (Oregon City, OR) and Pearl Substation (Wilsonville, OR).
Justification as BPA states it: Supports regional load growth, reliability needs and commercial requests for long-term transmission
Line segments
A planning bundle in BPA's Grid Expansion and Reinforcement Portfolio: status, expected energization and cost change with each cycle; not a permit, a contract or a route. Proposed line rebuilds and upgrades as BPA published them for its GERP cycle: expected energization year, estimated cost in dollars and status are BPA's planning figures at publication and change with each cycle; the geometry is the existing line the project follows, not a final route.
Map location unavailable. This plant remains part of the source inventory and tables.
Estimated cost
670,000,000USD
Source & method
The publisher's planning estimate for the project at publication (BPA GERP: nominal dollars as the layer carries it on the bundle, which does not say what it covers; BPA's summaries can state it for a group of projects); not a budget, contract or actual
2026-07-29 · reported · direct · valid · final
BPA's planning estimate as the layer carries it on this bundle at publication; nominal dollars. The layer does not say what it covers; BPA's project summaries can state it for a group of projects (group_name)
Bundle_ID=P05468; layer=lines
Publisher & attribution ↗ Cite this released fact ↗ Geographic & reporting context
A planning bundle in BPA's Grid Expansion and Reinforcement Portfolio: status, expected energization and cost change with each cycle; not a permit, a contract or a route. Proposed line rebuilds and upgrades as BPA published them for its GERP cycle: expected energization year, estimated cost in dollars and status are BPA's planning figures at publication and change with each cycle; the geometry is the existing line the project follows, not a final route.
Grid Expansion & Reinforcement Portfolio, line projects (Evolving Grid), layer 11
Bonneville Power Administration, Grid Expansion & Reinforcement Portfolio line projects (Evolving Grid), 2026
Proposed line rebuilds and upgrades as BPA published them for its GERP cycle: expected energization year, estimated cost in dollars and status are BPA's planning figures at publication and change with each cycle; the geometry is the existing line the project follows, not a final route.
Release 20260929T050546Z-51ae0f7d3c78 · Record JSON