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CN IA-4 Bridge

Through Plate Girder Bridge over Iowa Highways 4 and 7
Pomeroy, Calhoun County, Iowa

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Name CN IA-4 Bridge
Built By Illinois Central Railroad
Contractor Unknown
Currently Owned By Canadian National Railway
Length 36 Feet Total
Width 1 Track
Height Above Ground 14 Feet 1 Inch
Superstructure Type Through Plate Girder
Substructure Type Concrete
Date Built 1937
Traffic Count 4 Trains/Day (Estimated)
Current Status In Use
CN Bridge Number 401.0
Significance Local Significance
Documentation Date April 2018


This small through girder bridge crosses Iowa Highways 4 and 7 in the town of Pomeroy.
Built in 1937, the bridge consists of a single through girder span, set onto concrete substructures. The deck of the bridge has been encased in concrete to preserve the structure.
It is unknown when the deck was rebuilt. It appears to be more recently, as other alterations such as the addition of bolts shows a modern rehabilitation.
Overall, the bridge appears to be in fair to good condition. Some deterioration can be found on the superstructure.

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

Citations

Source Type

Source

Build Date 1973 Illinois Central Railroad Track Profile
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele