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Portland General Electric Photograph Collection Oak Grove Fork Clackamas River People With digital objects
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Oak Grove, interior of tunnel
Oak Grove, interior of tunnel
Oak Grove project, group standing on pipe at lower portal of tunnel #2
Oak Grove project, group standing on pipe at lower portal of tunnel #2
Oak Grove project, contractors and engineers
Oak Grove project, contractors and engineers
Oak Grove Tunnel, party of officials at northern portal
Oak Grove Tunnel, party of officials at northern portal