(rshsdepot) Seven Mile Bridge

["Alexander D. Mitchell IV" <LNER4472_@_bcpl.net>]

I have forwarded your mission and website to the webmaster of the Historic 
Bridges In the News website,

http://www.iceandcoal.org/bridges/bridgenews.html

However, I might advise you that, in my experience, concrete arch bridges 
are perhaps the most difficult type of bridge to preserve .  I have been 
involved in two attempts to preserve concrete arch bridges, and both were 
condemned to failure because the same deterioration that necessitated the 
retirement of the bridge also left them susceptible to catastrophic (i.e. 
overnight, all-at-once, not fatal) failure.  Both bridges were eventually 
demolished, with sympathetic architectural designs built into the 
replacements.

Alexander D. Mitchell IV



=================================
The Railroad Station Historical Society maintains a database of existing
railroad structures at: http://www.rrshs.org

------------------------------

End of RSHSDepot Digest V1 #1355
********************************

=================================
The Railroad Station Historical Society maintains a database of existing
railroad structures at: http://www.rrshs.org