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Bob Plumb

How do you construct new tunnels in downtown?

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With the recent talk about new towers and new tunnel connections I was wondering how exactly do you go about constructing them? 

 

Is it done by a simple open trench when available or some sort of tunnel boring machine?

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When heritage plaza made a tunnel connection to the garage they open trenched it. I drove over big iron plate for a long time

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I remember when One Shell and Well Fargo were not connected, but don't recall the method they used to connect.

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Well that makes sense.

 

I guess you start with an open trench in your available area topside then continue either direction at tunnel level under the buildings. I was just curious about how its done here given higher water tables and clay soil in the area. If I am still working dt when these projects are going on I will make sure to get over for a look.

 

*not an engineer

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