Posted by Bill Caywood on September 14, 2013 
The bulldozer in the center of this photo is an International Harvester machine and is one of the first to raise and lower it's blade with hydraulics, these were mounted above the machine's treads and moved the blade by moving the arms as seen above. The other bulldozer is an Allis Chalmers machine of the same vintage which mounted the hydraulics much higher on what is referred to as a hard nose. The Hard Nose is simply a heavy steel casting mounted to the frame that houses the radiator, the grill is part of the casting. Also please note that these machines do not have any lights, so work would cease at the end of the day.
Posted by on September 14, 2013 
Good destruction photo. Note on the bulldozer: no "roll cage", that dates the photo.
Posted by Curious142 on September 14, 2013 
Very interesting shot. How long did it take for that line to be re-opened?
Posted by Troy Staten on September 14, 2013 
That's a big mess, thanks for posting the neat photo.
Posted by Mordy on September 14, 2013 
Looks to me like a bridge collapse which caused a derailment, not the other way around...
Posted by Joe McMillan on September 15, 2013 
No, Mordy, it was the derailment that took down the bridge. I had heard that it was a wide load that struck the bridge girders, but I do not have the official report.
Posted by Joe McMillan on September 15, 2013 
I don't know how long it took to clear all this up, Curious142. I was there a couple days after the accident and they still had to build a two-span thru girder bridge and a pile trestle approach. The two destroyed through truss spans were never replaced. I imagine it was out of service for well over a week.
Posted by Mordy on September 15, 2013 
Interesting that a wide load could do so much damage. BTW Bill, it looks like the near bulldozer has lights, but otherwise thanks for the info... amazing how much some folks around here know.
Posted by Charles Kuehn on September 15, 2013 
Dunno about corporate mergers etc. in those days of yore, but the name on the "bulldozer" looks like "Allis Chalmers" to me. Can anybody add anything?
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