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Tunnel Segments
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Alder Shaft
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Slurry separation plant workers
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Opera Shaft overview
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Opera Shaft Groundbreaking
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Outfall 28 (SE 18th and Insley)
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Outfall 46 breakthrough
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Group shot of workers when MTBM broke through at Outfall 46
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Outfall 40
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Microtunnel Boring Machine (MTBM) suspended over shaft
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Opera Shaft
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Workers examing hydromill teeth
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Opera Shaft
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Clam exiting shaft
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Opera Shaft
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West side of TBM front and tail shield & Bowflex seal before start of tunneling
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Opera Shaft
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Tunnel Boring Machine (TBM) front shield underside showing push rams and hydraulic lines
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Steel Bridge Shaft site
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Microtunnel Boring Machine (MTBM) under assembly
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East Side CSO tunnel
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View of northbound tunnel with inspector
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Opera Shaft
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Close up overview with front shield and workers
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Opera Shaft
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The cutterhead of "Rosie" the TBM gets christened with the project team
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Opera Shaft
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Diver looking out of decompression chamber
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Opera Shaft
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Conveyor positioning over river
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Alder Shaft
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Flooded excavated shaft with Montage and Portland Storage Co in background
| Tunnel Progress |
| Follow the Tunnel Boring Machine of the East Side Big Pipe Project |
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| Outreach |
| Community outreach and opportunities |
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