http://www.shorpy.com/node/8647?size=_original
Pioneering with the Caisson method! First ever railway tunnel build according to this principle.
Here's wikipedia.
http://www.shorpy.com/node/8647?size=_original
Pioneering with the Caisson method! First ever railway tunnel build according to this principle.
Here's wikipedia.
Last edited by Whitehouse; August-04-10 at 08:29 PM.
|
Bookmarks