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Dundee Railroad Bridge

   


Dundee Railroad Bridge

Primary Photographer(s): Nathan Holth and Luke Gordon

Bridge Documented: August 1, 2005
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Key Facts

Facility Carried / Feature Intersected
Railroad (Ann Arbor Railroad) Over River Raisin
Location
Dundee: Monroe County, Michigan
Structure Type
Metal 5 Panel Rivet-Connected Pratt Through Truss, Fixed and Approach Spans: Metal Deck Girder, Fixed
Construction Date and Builder / Engineer
1922 By Builder/Contractor: American Bridge Company of New York, New York

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
120 Feet (36.6 Meters)
Structure Length
250 Feet (76.2 Meters)
Roadway Width
12 Feet (3.7 Meters)
Spans
1 Main Span(s) and 3 Approach Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)

Bridge Documentation

This is a traditionally composed railroad through truss bridge that sits on highly unusual caisson supports. Most railroad bridges in this area sit on stone or concrete types of piers or abutments. This style of caissons were generally more common with highway bridges. These caissons also have stone on the top, which is odd. Typical design of this style of caisson (sometimes called Lally collumns) is concrete inside with a steel shell on the outside. Stone normally isn't part of the design. The caissons on this bridge are also interesting because they are connected by bracing rods and built-up beams with lattice. They also have been repaired, with giant straps added, as well as some steel welded on.

This bridge is a convenient location, and is easily visible to people traveling M-50 through Dundee. The bridge has v-lacing on diagonals, and the bracing is latticed. Connections are riveted. The bridge carries one railroad track, which is active. Deck plate girders provide and approach for the bridge; two at the north end and one at the south end.

A historical photo and brief article from 1939 shows that this bridge survived a derailment that occurred on the bridge.

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