Combined Sewer Overflow

ESCSO Review Committee

POL

Government

Special Projects

Combined Sewer Overflow

City Web Sites

Tunnel Segments
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Alder Shaft
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Slurry separation plant workers
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
Outfall 40
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Microtunnel Boring Machine (MTBM) suspended over shaft
Opera Shaft
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Workers examing hydromill teeth
Opera Shaft
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Clam exiting shaft
Opera Shaft
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West side of TBM front and tail shield & Bowflex seal before start of tunneling
Opera Shaft
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Tunnel Boring Machine (TBM) front shield underside showing push rams and hydraulic lines
Steel Bridge Shaft site
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Microtunnel Boring Machine (MTBM) under assembly
East Side CSO tunnel
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View of northbound tunnel with inspector
Opera Shaft
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Close up overview with front shield and workers
Opera Shaft
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The cutterhead of "Rosie" the TBM gets christened with the project team
Opera Shaft
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Diver looking out of decompression chamber
Opera Shaft
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Conveyor positioning over river
Alder Shaft
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Flooded excavated shaft with Montage and Portland Storage Co in background