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M-65 Bridge

Five Channels Bridge

M-65 Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: June 16, 2003, October 1, 2004, and October 2, 2011

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Key Facts

Facility Carried / Feature Intersected
M-65 (Old Alignment) Over Ausable River
Location
Rural: Iosco County, Michigan: United States
Structure Type
Metal 9 Panel Rivet-Connected Parker Pony Truss, Fixed and Approach Spans: Concrete Deck Girder, Fixed
Construction Date and Builder / Engineer
1930 By Builder/Contractor: Walter Toebe Company and Engineer/Design: Michigan State Highway Department

Technical Facts

Rehabilitation Date
1998
Main Span Length
120 Feet (37 Meters)
Structure Length
320 Feet (98 Meters)
Roadway Width
23.3 Feet (7.1 Meters)
Spans
2 Main Span(s) and 2 Approach Span(s)
NBI Number
35135012000B020

Historic Significance Rating (HSR)

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

This bridge is a rare surviving example of a Michigan State Highway Department standard plan truss bridge in Michigan. This design of bridge was the last standardized truss bridge to be constructed in Michigan. The design is distinguished by its massive members, Parker pony truss configuration, and the unusual use of lattice on the top of the top chord and end post instead of cover plate. This bridge is the only surviving multi-span example of this standard plan truss in Michigan. There also is no other highway pony truss in Michigan that exceeds the long 120 foot span length of this bridge. The bridge was rehabilitated in 1998 but after only a handful of years, MDOT had decided to slightly realign M-65 and construct a new high level bridge. Unlike many states however, MDOT did not demolish the historic bridge and instead continued to own the historic bridge, allowing it to stand next to its replacement as a non-motorized crossing, later planning to also allow snowmobile use on the bridge. Thanks to the rehabilitation that occurred only a few years before the bridge's vehicular service ended, the bridge remains in excellent condition today. During rehabilitation, MDOT replicated the original balustrade railings on the approach girder and abutment. The original railings had been replaced years ago. The bridge today retains excellent historic integrity. The bottom chord was filled with concrete at an unknown date. A previous rehabilitation occurred in 1973. The bridge is officially listed as historic on Michigan's Historic Bridge Inventory.

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Photo Galleries and Videos: M-65 Bridge

 
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Structure Overview
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A collection of overview photos that show the bridge as a whole and general areas of the bridge. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
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Structure Details
Original / Full Size Photos
A collection of detail photos that document the parts, construction, and condition of the bridge. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
Structure Overview
Mobile Optimized Photos
A collection of overview photos that show the bridge as a whole and general areas of the bridge. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
Structure Details
Mobile Optimized Photos
A collection of detail photos that document the parts, construction, and condition of the bridge. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer

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Maps and Links: M-65 Bridge

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