Off topic (Not this specific bridge):
There used to be a rather long bridge on Damen Avenue, between Pershing Road and 47th Street (39 to 47 south), a sort of freeway connecting those two points. A rather large railroad yard lies between Pershing and 47th street, and the Damen Avenue Skyway, as I believe it was called, was the only way across the yard.
This bridge was built in the late 1960s, if I recall, and was demolished, never replaced, in the late 1990s. I do not have exact dates on either construction or demolition.
Somewhere in my archives are a handful of aerial photos of this bridge in process of demolition. If I can find them, I will forward them.
While this bridge was a typical "UCEB," it was still unusual in that Chicago had tried to connecting some neighborhoods, and it is a mystery to me why this project and bridge were abandoned.
Evidently the bridge over the rail yard was called the South Damen Viaduct: http://chicagohistorytoday.wordpress.com/2013/11/12/south-da...
I've added a page for it: http://bridgehunter.com/il/cook/bh60352/