CS&SC = Chicago Sanitary & Ship Canal
Historic Bridges indicates this bridge was designed by Strauss Engineering instead of the City of Chicago.
If you can find a place to park, it is easy to take photos of railroad bridges from road bridges. But the converse is not true. So I'll use a satellite image.
The Cicero Avenue Bridge construction site on July 2, 1925, viewed looking north from the south side of the Chicago Sanitary and Ship Canal.
Dennis DeBruler According to Historic Bridges, the bridge was opened in 1927 with just two pony trusses. The third one was added in 1966 when the width was doubled. That is why the bridge looks so narrow in this photo.
That expansion must mean that the trusses were overdesigned by at least a factor of two because the center truss now holds the weight of a whole leaf rather than just half a leaf.
A soil boring crew works along the Chicago Sanitary and Ship Canal collecting samples for the foundation of the north abutment of the soon-to-be-built Cicero Avenue Bridge in Chicago, Illinois, on August 12, 1921.
[Are the piles still left over from the digging of the canal?]
Dennis DeBruler: This is also a nice view of the powerline that went from the Lockport Powerhouse to the switchyard building just west of Western Avenue.
A view to the east showing workers paving the northern approach to the under-construction Cicero Avenue bridge over the Chicago Sanitary and Ship Canal on November 5, 1926.
A view to the north showing construction of the Cicero Avenue bridge over the Chicago Sanitary and Ship Canal in Chicago, Illinois, on September 7, 1926. The bridge was completed in 1927.