| Special Bridge Conditions Legend |
| ! | Confirmed demolition date within one year or an especially historic bridge that is threatened with demolition at any level. |
| X | The bridge has been confirmed demolished or collapsed. |
| S | The bridge has been dismantled or moved to an offsite location and is not currently available for public viewing. |
| L | Most or all of the original bridge material has been demolished and replaced, including historically significant elements, but some original parts of the bridge remain. |
| Note: This website cannot guarantee the current condition of any bridge on this website. Bridges lacking these icons should not necessarily be considered condition-free. |
| Bridge Name | HSR Rating | Facility Carried / Feature Intersected | Location | Structure Type | Structure Dimensions | Construction Date / Builder or Contractor | Description | Thumbnail |
Mackinac Bridge
Big Mac / Mighty Mac |
 | I-75 Over Straits of Mackinac | Mackinaw City and St. Ignace: Emmet County, Michigan and Mackinac County, Michigan | Metal 96 Panel Deck Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Continuous Bolt-Connected Warren Deck Truss, Fixed |
Total Length: 19248.6 ft Main Span Length: 3800 ft Roadway Width: 48 ft Main Spans: 3 |
1957 By: American Bridge Company of New York, New York and David Steinman of New York, New York | The longest bridge in the western hemisphere, designed by David B. Steinman. | 
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Mitchell Street Bridge
Petoskey Bridge |
 | US-31 and M-68 (Mitchell Street) Over Bear Creek | Petoskey: Emmet County, Michigan | Concrete T-Beam, Fixed |
Total Length: 264.8 ft Main Span Length: 45 ft Roadway Width: 40 ft Main Spans: 7 |
1930 By: Whitney Brothers and Michigan State Highway Department | A massive concrete t-beam bridge with beautiful design details, this is truly a unique bridge. | 
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US-31 Carp River Bridge
Mackinaw Highway Carp River Bridge |
 | US-31 (Mackinaw Highway) Over Carp Lake River | Rural: Emmet County, Michigan | Concrete T-Beam, Fixed |
Total Length: 30.8 ft Main Span Length: 30.8 ft Roadway Width: 36 ft Main Spans: 1 |
1933 By: Unknown | This bridge is an example of a t-beam bridge with railings that are reminiscent of a concrete camelback. | 
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