 The first segment, from Ladd through Peru and LaSalle to Ottawa, was constructed in 1904, with an extension from Ottawa east to Marseilles completed later that year.Two years later the line was extended in both directions, west from Marquette to Princeton and east from Marseilles to Seneca.Construction continued eastward, the route reaching Morris in 1909 and Joliet in 1912, where it connected with the Chicago and Joliet Electric Railway.