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Saginaw Bascule Railroad Bridge

CSX Saginaw River Bridge

   


Saginaw Bascule Railroad Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: Summer 2007
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Key Facts

Facility Carried / Feature Intersected
Railroad (CSX) Over Saginaw River
Location
Saginaw: Saginaw County, Michigan
Structure Type
Metal 8 Panel Rivet-Connected Warren Through Truss, Movable: Single Leaf Bascule (Abt) and Approach Spans: Metal 5 Panel Rivet-Connected Pratt Through Truss, Fixed
Construction Date and Builder / Engineer
1944 By Builder/Contractor: American Bridge Company of New York, New York

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
160 Feet (48.8 Meters)
Structure Length
700 Feet (213.4 Meters)
Roadway Width
15 Feet (4.6 Meters)
Spans
1 Main Span(s) and 5 Approach Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)

Bridge Documentation

American Bridge Company AdvertisementThe west end of this bridge has one deck plate girder and three through truss approach spans. Going eastward, each truss approach span is a little larger than the next. The first two approach trusses are four panels, although the second one is a bit longer. The third, westernmost, of the approach spans has five panels. There are no approaches to the main bascule span at the eastern end. All the approach truss spans are riveted connection Pratt truss spans. This bridge was built in 1944 by the American Bridge Company and is a good example of the transition from v-laced and latticed built-up beams to a more plain built-up box beam that feature only punched holes. The approach spans do have v-lacing and lattice on the members and bracing however, while the bascule span has the punched hole box beams. The bascule span still has the v-lacing on the bracing however. The bascule span is an eight panel riveted connection through truss. The mechanics of the bascule span are very much like the Port Huron Railroad Bridge. The Port Huron Bridge is, like this Saginaw Bridge, inoperative. Unlike the Saginaw Railroad Bridge, the Port Huron example is always in the raised position. By comparing the two bridges you can see how the unusual counterweight swings between two positions as the bridge raises or lowers. The Port Huron bridge is an earlier example, with a 1931 construction date.

An advertisement for the American Bridge Company featured an Abt type bascule bridge built in Beaumont, Texas, similar in design to the Saginaw Bascule Bridge. However, the bridge in Beaumont Texas has been demolished. The Saginaw Bascule bridge is one of the few remaining examples of this bridge type in the country.

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Photos and Videos: Saginaw Bascule Railroad Bridge

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A collection of detail photos that document the parts, construction, and condition of the bridge. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution.
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View Photo Gallery
Structure Details
Mobile Optimized Gallery
A collection of detail photos that document the parts, construction, and condition of the bridge. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem (dial-up) users, or those who do not wish to wait for the longer download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
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