With the first segment completed, the railroad continued constructing another 119 miles of track to Geneseo. By 1854, the remaining portions of track were constructed into Rock Island, Illinois; located on the Mississippi River.
The first bridge across the Mississippi River would be built connecting Davenport to Rock Island in 1856. After a fire and collapse later that year, the bridge was rebuilt and would begin carrying traffic into Iowa.
Later in 1856, the Mississippi and Missouri Railroad would begin construction on a pair of main lines in Iowa. One route went towards Missouri, while the other continued on the straight west trajectory.
The first 55 miles on the western mainline saw the connection of Davenport and Iowa City by the end of 1856. Another 31 miles to Marengo would be completed by the end of 1862.
These two railroads would become part of the Chicago, Rock Island & Pacific Railroad in 1866. The Rock Island later saw the completion of the route to Nebraska.
As traffic continued to build on the line, it was continuously upgraded. The route through Illinois was double tracked in the 1890s, and the route to Iowa City was double tracked by 1900.
However, this double track proved unnecessary and was removed in the 1930s. Because of the Rock Island Railroads poor management, the railroad oftentimes found itself in financial trouble; despite having a solid core of routes.
Between World War II and 1980, the railroad saw even harder economic downturns. Failed mergers and poor money management led to the inevitable downfall of the railroad.
By 1980, the railroad was officially bankrupt for the final time. Trustees saw the liquidation of the railroad, which sold off and abandoned many lines.
However, as this was the core main line of the Rock Island, it saw a positive future. After an earlier railroad failed in the early 1980s, the Iowa Interstate Railroad was formed in late 1984 to operate over track between Ottawa, Illinois and Omaha, Nebraska.
Since its original forming, the IAIS has turned a once dead mainline into a thriving alternative to Interstate 80. Today, this segment is known as the 1st Subdivision.
01/14/22
Located in the heart of Davenport, a pair of through trusses cross streets along an elevated track leading towards the Government (Arsenal) Bridge.
This particular structure crosses 3rd and Iowa Streets.
Built in 1928, the bridge likely replaced a smaller girder bridge. The truss on this bridge is massive, containing 6 panels and riveted connections.
Utilizing a Subdivided Warren design, the truss is also approached by an I-Beam span on either side. The substructures on the bridge are built of concrete and steel.
Along with the nearby 4th Street Bridge, these two structures are extremely recognizable to the community. As Davenport continues to develop into a more upscale area, one can expect these two iconic bridges to be painted and look even nicer.
Overall, the bridge remains in very good condition. Recently, the deck on the bridge was replaced and corrosion corrected.
The author has ranked this bridge as being locally significant, due to the newer age.
The photo above is an overview. The bridge can be accessed from the streets below.