ABSTRACT
Introduction................................................................................................................9 Federal.Mining.District................................................................................. 10 Galena.and.Chicago.Union.Railroad............................................................ 12 Chicago,.Iowa.and.Nebraska.Railroad.......................................................... 12 Planning.the.Mississippi.Crossing................................................................ 13
The.First.Bridge........................................................................................................ 14 General.Warren’s.Report............................................................................... 14
Illinois.Bridge.Section........................................................................ 15 Iowa.Bridge.Section............................................................................ 17
Swing.Bridge.Typology................................................................................. 17 The.First.Swing.Span.................................................................................... 17 Repairs.to.First.Bridge.1873.to.1887............................................................. 19
The.Second.Bridge...................................................................................................20 The.Third.Bridge......................................................................................................20
