- 1903: 22 miles of double track completed from Lake Bluff, Illinois to Mayfair, Illinois by the Chicago Northern Railway
- 1903: Chicago Northern acquired by the Chicago & North Western Railway
- 1905: 17 miles of double track completed from Chicago Northern Junction to Wisconsin/Illinois State Line by the Chicago and State Line Railway
- 1905: C&SL acquired by the Milwaukee & State Line Railway
- 1906: 34 miles of double track completed from Wisconsin/Illinois State Line to St. Francis, Wisconsin by the Milwaukee and State Line Railway
- 1909: M&SL acquired by the Chicago & North Western Railway
- 1910: 11 miles of double track completed from Proviso to Deval, Illinois by the Des Plaines Valley Railway
- 1911: 10 miles of double track completed from Deval to Valley, Illinois by the Des Plaines Valley Railway
- 1913: Des Plaines Valley Railway acquired by the Chicago & North Western Railway
- 1954: Relocation due to O'Hare Airport
- 1960: Second track mostly removed between Gurnee and St. Francis
- 1995: Chicago & North Western purchased by Union Pacific Railroad
- 1995-Present: Union Pacific operates the Milwaukee Subdivision from Proviso to St. Francis Avenue, continuing north towards Butler
06/26/21
This bridge is a rather mundane structure over Bay Street, on an abandoned C&NW line.
This bridge is a simple modern 75 foot through girder, on concrete abutments with nearly zero decoration features.
It was built in 1980, and the photo above is an overview. The author has ranked it as having no significance, due to the modern age.