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Monroe Railroad Bridge

Monroe Railroad Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: October 12, 2019

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Key Facts

Facility Carried / Feature Intersected
Railroad (Kansas City Southern) Over Ouachita River
Monroe: Ouachita Parish, Louisiana: United States
Structure Type
Metal Rivet-Connected Pratt Through Truss, Movable: Swing (Rim Bearing Center Pier) and Approach Spans: Metal 9 Panel Pin-Connected Pratt Through Truss, Fixed
Construction Date and Builder / Engineer
1907 By Builder/Contractor: A. M. Blodgett of Kansas City, Missouri and Engineer/Design: C. Shaler Smith (1882 Substructure)

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
295 Feet (89.9 Meters)
Structure Length
915 Feet (278.9 Meters)
Roadway Width
Not Available
1 Main Span(s) and 3 Approach Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)
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Bridge Documentation

This large truss bridge has a variety of span types and ages, and has a complex history. Total length given is an estimate. The bridge appears to be a 1906-1907 truss sitting on 1882 substructure of a previous bridge.

From west to east the bridge is configured as follows. First, a five panel rivet connected Pratt through truss, about 125 foot span, dating to 1907 and built by A.M. Blodgett of Kansas City, Missouri. Next, a nine panel pin-connected Pratt through truss of about 245 foot span length. Depsite the different design (pin-connected), this span likely dates to 1906-1907 as well. Next, the rivet-connected through truss swing main span of 295 feet. It is believed this span dates to 1906, which is the construction date given by TranSystems, who rehabilitated the swing span pier in 2007. Lastly, another nine panel pin-connected Pratt through truss of about 245 foot span length.

The swing pier has been supplemented by new modern steel and concrete designed to deal with the original pier shifting. The original piers on the bridge are a rare brick design, and are assumed to date to the 1882 bridge.



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