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CN County D36 Bridge

Through Plate Girder Bridge over County Road D36 (Former US-20)
Rockwell City, Calhoun County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name CN County D36 Bridge
Built By Illinois Central Railroad
Contractor McClintic-Marshall Corporation of Chicago
Currently Owned By Canadian National Railway
Length 127 Feet Total, 70 Foot Main Span
Width 1 Track
Height Above Ground 14 Feet 5 Inches
Superstructure Type Through Plate Girder and Concrete Slab
Substructure Type Concrete
Date Built 1934
Traffic Count 2 Trains/Day (Estimated)
Current Status In Use
CN Bridge Number 398.8
Significance Local Significance
Documentation Date April 2018


This small through girder bridge crosses county road D36 near Rockwell City.
Built in 1934, the bridge consists of a single through girder span, set onto concrete substructures. In addition, the bridge is approached by a series of concrete slab spans.
When first constructed, the bridge was built to cross US Highway 20. However, the highway was relocated several miles to the north in 2010 as part of an effort to widen the road across Iowa.
Overall, the bridge appears to be in fair to good condition. Some deterioration can be found on the superstructure and substructure.

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
Contractor McClintic-Marshall plaque
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele