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Portland General Electric Photograph Collection Dams--Design and construction With digital objects English
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Oak Grove project, slide viewed from camp #4 ½
Oak Grove project, slide viewed from camp #4 ½
Oak Grove project, camp #5 ½ at Roaring River ranger station
Oak Grove project, camp #5 ½ at Roaring River ranger station
Oak Grove project, diamond drill at lower damsite intake
Oak Grove project, diamond drill at lower damsite intake
Oak Grove project, tractor powered sawmill
Oak Grove project, tractor powered sawmill
Oak Grove project, view of penstock line from office of Hurley-Mason Company office
Oak Grove project, view of penstock line from office of Hurley-Mason Company office
Oak Grove project, logging of penstock line at Three Lynx Camp
Oak Grove project, logging of penstock line at Three Lynx Camp
Oak Grove project, looking west at Frog Lake
Oak Grove project, looking west at Frog Lake
Oak Grove project, east along conduit line with Frog Lake in forground
Oak Grove project, east along conduit line with Frog Lake in forground
Oak Grove project, first eight lengths of conduit line at Davis Ranch
Oak Grove project, first eight lengths of conduit line at Davis Ranch
Oak  Grove project, Hurley-Mason Company pipe travelers being tested
Oak Grove project, Hurley-Mason Company pipe travelers being tested
Oak Grove project, coffer dam at dam site
Oak Grove project, coffer dam at dam site
Oak Grove project, looking east across Oak Grove Meadow
Oak Grove project, looking east across Oak Grove Meadow
Oak Grove project, first load of conduit pipe at Davis Ranch
Oak Grove project, first load of conduit pipe at Davis Ranch
Oak Grove project, view of dam
Oak Grove project, view of dam
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, water filling pond less than one hour after closing dam
Oak Grove project, water filling pond less than one hour after closing dam
Oak Grove project, closing of gates at dam
Oak Grove project, closing of gates at dam
Cazadero Dam
Cazadero Dam
Oak Grove project, construction
Oak Grove project, construction
Station G, Faraday Dam
Station G, Faraday Dam
Oak Grove Tunnel, party of officials at northern portal
Oak Grove Tunnel, party of officials at northern portal
Oak Grove, interior of tunnel
Oak Grove, interior of tunnel
Men working under dam structure, Columbia River?
Men working under dam structure, Columbia River?
Men working on dam, Columbia River?
Men working on dam, Columbia River?
Diver in river during dam construction, Columbia River?
Diver in river during dam construction, Columbia River?
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