Peter Stockdale wrote:
> What you refer to is a "drop" lock.
> There is one on the Forth and Clyde.
> There is so much "safety" built in, that the cost spirals. 
> It would be as expensive to construct one of these as to sort out the 
> tunnel properley IMHO.

No, I'm specifically NOT referring to a drop lock. This was just a crazy 
idea which I couldn't immediately see a technical flaw in, barring 
possibly the width/depth of the tunnel which I've not checked. I might 
do this for fun as I'll be there over the weekend.

Steve
NB Bream


 
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