UP Bridge #109.90

Steel Stringer Bridge over Unnamed Ditch
East of Nevada, Story County, Iowa

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Name UP Bridge #109.90
Built By Chicago, Rock Island & Pacific Railroad
Contractor Unknown
Currently Owned By Union Pacific Railroad
Length 35 Feet Total
Width 1 Track
Height Above Ground 5 Feet (Estimated)
Superstructure Type Steel Stringer
Substructure Type Concrete
Date Built Ca. 1940
Traffic Count 15 Trains/Day (Estimated)
Current Status In Use
UP Bridge Number 109.90
Significance Minimal Significance
Documentation Date October 2016 and January 2022
In 1913, the St. Paul and Kansas City Short Line Railroad built a line directly between Des Moines, Iowa and Mason City, Iowa.
This route immediately became a part of the Chicago, Rock Island & Pacific. Connecting to St. Paul, Minnesota on the north and Kansas City to the south; the route was known as the Rock Island Spine Line.
Despite the great routing of the line, the Rock Island oftentimes faced financial issues, which led to deferred maintenance of this route.

By the time a judge ordered liquidation of the Rock Island assets, the route was in poor condition. The Chicago & North Western Railway and Soo Line Railroad entered a bidding war to win the Spine Line and its connections to Kansas City.
After the C&NW came out victorious, over a year was spent rebuilding the line to get it back into operating condition. The route opened in 1983, and provided the C&NW with a direct connection to Kansas City.
At Nevada, Iowa; a connection was built to the Clinton Subdivision to allow a connection between major routes. This connection opened up in 1983.
In 1995, the C&NW was purchased by Union Pacific. Today, Union Pacific continues to operate this line as the Mason City Subdivision.

Located below the Union Pacific Bridge, this small beam bridge crosses an unnamed ditch.
Built in approximately 1940, it is likely that this span replaced a pile trestle. It consists of a standard steel stringer, set onto concrete substructures.
There are little notable features on this bridge, and no date could be found. It appears the bridge is in good condition.

The author has ranked this bridge as being minimally significant, due to the common design and small size.
The photo above is an overview, with the bridge partially obscured by a stone pier.


Source Type


Build Date Estimated
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele

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