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CN E. Fork Boyer River Bridge

Through Plate Girder Bridge over E. Fork Boyer River
Denison, Crawford County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name CN E. Fork Boyer River Bridge
Built By Illinois Central Railroad
Contractor American Bridge Company of New York
Currently Owned By Canadian National Railway
Length 175 Feet Total, 79 Foot Main Span
Width 1 Track
Height Above Ground 15 Feet (Estimated)
Superstructure Type Through Plate Girder and I-Beam
Substructure Type Steel Pile
Date Built 1966
Traffic Count 2 Trains/Day (Estimated)
Current Status In Use
CN Bridge Number 449.1
Significance Minimal Significance
Documentation Date December 2018
In 1898, the Fort Dodge and Omaha Railroad began construction of a new line, linking a Dubuque & Sioux City Railroad (Illinois Central) line at Tara, Iowa to Omaha, Nebraska.

This new line would be completed in a staggering 208 days, opening in early 1899. The line was owned by the D&SC (which was a subsidiary of Illinois Central).
The line was also the most significant branch off the D&SC mainline through Iowa.

The new line connected mainly rural areas, and crossed into Omaha on a swing bridge over the Missouri River.
This bridge was leased from the Omaha Bridge and Terminal Railway Company.

When completed, the line was regarded as a mainline, connecting Nebraska to Chicago. East of Tara, the line connected Waterloo, Dubuque and Chicago.

By 1947, the IC fully absorbed any remains of the Dubuque & Sioux City Railroad. IC became the sole operator and proprietor of this line.
In 1972, the Gulf, Mobile & Ohio merged with IC to form the Illinois Central Gulf.

In 1985, operations of the ICG western division (west from Chicago) was spun off into the Chicago Central and Pacific Railroad.
By 1996, the railroad was repurchased by Illinois Central. Canadian National Railway purchased Illinois Central in 1999, and continues to operate the line as the Omaha Subdivision.
06/26/21


Located in Denison, this standard through girder bridge crosses the East Boyer River.
Built in 1966, the bridge features a single through girder main span. In addition, the approaches on the bridge consist of steel stringer spans, and the substructures consist of steel piles.
When the route was constructed, the original bridge here was a three span through girder. However, it is apparent that the river was channelized, requiring the need for a different bridge.
Overall, the bridge appears to be in good condition. Portions of the old bridge abutments can be seen below the current bridge.

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

Citations

Source Type

Source

Erection Date 1973 Illinois Central Railroad Track Profile
Contractor American Bridge Company plaque
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele



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