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CN Des Moines River Bridge

Deck Plate Girder Bridge over Des Moines River
Fort Dodge, Webster County, Iowa

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Name CN Des Moines River Bridge
Built By Illinois Central Railroad
Contractor (1965 Spans) Bethlehem Steel Company of Bethlehem, Pennsylvania
Currently Owned By Canadian National Railway
Length 415 Feet Total, 100 Foot Largest Span
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Type Deck Plate Girder
Substructure Type Stone Masonry and Concrete
Date Built 1965 and 1999
Traffic Count 4 Trains/Day (Estimated)
Current Status In Use
IC Bridge Number 376.0
Significance Minimal Significance
Documentation Date April 2017


This simple deck girder bridge crosses the Des Moines River in Fort Dodge.
The previous bridge here had a pair of 1891 Parker Through Trusses, fabricated by the Pencoyd Iron Works. The western of these trusses was replaced in 1965, likely due to flooding issues.
As a replacement, the truss would be removed and two new deck girders installed. A concrete pier would be added between the stone.
In 1999, the process was repeated for the second truss. Presently, the bridge features four deck girder spans, set onto a combination of concrete and stone substructures.
A common design, spans like this are common all across the country.
Currently, the bridge remains active as part of the Canadian National mainline.

The author has ranked this bridge as being minimally significant, due to the common design and new age.
The photo above is an overview. The bridge can be accessed from a nearby road.

Des Moines River Railroad Bridges
Upstream (East Fork) Gotch Park Trail Bridge
Upstream (West Fork) Dakota City Rail Bridge
Downstream Fort Dodge High Bridge

Citations

Source Type

Source

Build Date 1973 Illinois Central Track Profile
Contractor Bethlehem Steel Company plaque
Build Date 1999 Aerial Imagery
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele