RE: (erielack) New tunnel

["J. Henry Priebe Jr." <root_@_bluemoon.net>]

I should clarify that the tubes were fabricated in-situ using cast iron ring
segments, they weren't pre-fabricated.

Henry

On Wed, 10 Jun 2009, J. Henry Priebe Jr. wrote:

> On Wed, 10 Jun 2009, Paul Brezicki wrote:
> 
> > Since it's in N Korea, I wonder if it doubles as a fallout shelter; that 
> > appears to be consistent with the mindset over there. I think I read that 
> > the PRR Hudson tunnels are actually fabricated tubes that sit in the mud on 
> > the river bottom.
> 
> You are correct. The PRR tunnels were bored through the mud using the shield
> method of tunneling with cast iron ring segments. They "float" in the mud and
> when they were built it was not known whether or not the tunnels would 'flow'
> down the river with the mud. They turned out to be very stable.
> 
> Henry

J. Henry Priebe Jr.    Blue Moon Internet Corp Network Administrator
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