Dana, this bridge and https://bridgehunter.com/ia/jasper/north-skunk-creek/ are the same.
Switchback Arch was the original name the railroad gave it, and the historic article explains how it functions as a 3-hinge arch: https://books.google.com/books?id=RDUxAQAAMAAJ&pg=PA218&dq=S...
Daniel added this based off of info posted by James Holzmeier, so he listed it as the old Wabash bridge, which was a truss.
But this isn't the Wabash line, and I agree with the assessment that it was a DPG.
Lisa, lostbridges has several postcard images of the previous bridge: http://www.lostbridges.org/details.aspx?id=NE/27-54-U01x&loc...
Historicaerials shows this bridge in 1958 as a spur of the St. Louis-San Fransisco Railroad, but later as a road bridge.
From what I can see, all of the non-lift spans are riveted/too heavily built to have been built in 1872, so I'm going to say that the whole thing was replaced in 1993:
Here's another nice international bridge that still exists, this one on the Höllentalbahn in the Black Forest within the German state of Baden-Württemberg.
Kosovo isn't in the US, so no.
The claim that Tullock built everything from Belle to Versaille appears to stem from: https://books.google.com/books?id=5VBBAQAAMAAJ&q=gasconade+b... .
Considering you have it in Canada, no.
Doug, it's a Whipple arch/bowstring.
According to this, AmBridge built the bridges in association with Tullock: https://books.google.com/books?id=8qIxAQAAMAAJ&pg=PA460&dq=R...
It's alright, Dana+Kay, you didn't know of the existence of the powder keg that would get set off.
"Internet layman", refers to one's lack of prowess with using the internet, and clearly makes no mention at all of bridges.
Your constant desire to act personally attacked is quite telling, though...