UP Bridge #223.35

Steel Stringer Bridge over Unnamed Drainage Ditch
North of Alton, Sioux County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name UP Bridge #223.35
Built By Chicago, St. Paul, Minneapolis & Omaha Railway
Contractor (Superstructure) Minneapolis Steel & Machinery Company of Minneapolis
Contractor (Substructure) James McClure of St. Paul, Minnesota
Currently Owned By Union Pacific Railroad
Length 24 Feet Total
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Type Steel Stringer
Substructure Type Concrete
Date Built 1910
Traffic Count 4 Trains/Day (Estimated)
Current Status In Use
C&NW Bridge Number 759
UP Bridge Number 223.35
Significance Minimal Significance
Documentation Date November 2019
A brief history of the Union Pacific Mankato and Worthington Subdivisions:


Located just north of Alton, this steel stringer bridge crosses a small drainage ditch alongside Iowa Highway 60 near 430th Street.
Built in 1910, the bridge consists of a single steel stringer span, set onto concrete substructures. The beams on this bridge are arranged in two sets of four, for eight total beams. Two other identical spans exist between Hospers and Alton.
It appears that the bridge is relatively unchanged since the original construction.
Overall, the bridge appears to be in good condition, with little notable deterioration, with the exception of some minor spalling.

The author has ranked the bridge as being minimally significant, due to the common design.
The photo above is an overview.


Source Type


Build Date Chicago & North Western Railway Historical Society Archives
Contractors Chicago & North Western Railway Historical Society Archives
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele

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