Rising Costs and Delays in Seattle Area Wastewater Plant and Tunnels

February 25, 2008 rockman Project Related Comments Off on Rising Costs and Delays in Seattle Area Wastewater Plant and Tunnels

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Repairs to the old Devil's Slide landslide area on CA Highway 1, soon to be abandoned when the tunnel bypass opens.
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Devil’s Slide excavation completed for both tunnels

February 10, 2011 rockman Project Related Comments Off on Devil’s Slide excavation completed for both tunnels

The notorious landslide-prone stretch of California Highway 1 at Devil’s slide has only about one more year until traffic bypasses it completely thanks to the twin bore tunnels that have just completed excavation. They still […]

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Miscellaneous

London Underground trains hit “bulge” in tunnel lining under River Thames

May 17, 2012 rockman Miscellaneous Comments Off on London Underground trains hit “bulge” in tunnel lining under River Thames

Grouting work done earlier in the week was a possible cause of a bulge in the lining of a train tunnel under the River Thames. Two trains hit the bulge before the line was closed, […]

Bertha TBM cutterhead being lowered back into access shaft
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Tunneling machine’s front end bolted in place

August 31, 2015 rockman Project Related Comments Off on Tunneling machine’s front end bolted in place

The troubled Alaska Way Viaduct Replacement Tunnel TBM known as Bertha has reached a milestone in its repair. The front cutterhead has been repaired, and has been lowered back into the access shaft to be […]