| 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 | ! |
3 Mile Road Bridge
|
 | 3 Mile Road Over North Branch Chippewa River | Rural: Osceola County, Michigan | Concrete Through Girder, Fixed |
Total Length: 34.8 ft Main Span Length: 33.8 ft Roadway Width: 21 ft Main Spans: 1 |
1920 By: Unknown and Michigan State Highway Department | This bridge appears to be the only bridge in the entire county with any heritage value whatsoever. | 
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Evart Railroad Bridge
|
 | Railroad (Pere Marquette Rail-Trail) Over Muskegon River | Evart: Osceola County, Michigan | Metal 5 Panel Rivet-Connected Pratt Through Truss, Fixed | Main Spans: 1 | By: Unknown | This truss bridge is a noteworthy historic landmark on this lengthy rail-trail. | 
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M-66 Bridge
|
 | M-66 (30th Avenue) Over Doc and Tom Creek | Rural: Osceola County, Michigan | Concrete T-Beam, Fixed |
Total Length: 30.8 ft Main Span Length: 30.8 ft Roadway Width: 33 ft Main Spans: 1 |
By: Unknown and Michigan State Highway Department | A small t-beam bridge is an early example of a bridge with the unique Michigan Type R4 railing. | 
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M-66 Middle Branch Rover Bridge
|
 | M-66 (Mill Street / 30th Avenue) Over Middle Branch River | Marion: Osceola County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 45 ft Main Span Length: 45 ft Roadway Width: 40 ft Main Spans: 1 |
1939 By: George W. Drew and Michigan State Highway Department | This small stringer bridge was funded by Depression-era federal aid. | 
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M-66 Whetstone Creek Bridge
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| M-66 (30th Avenue) Over Whetstone Creek | Rural: Osceola County, Michigan | Pre-Stressed Concrete Adjacent Box Beam, Fixed |
Total Length: 40 ft Main Span Length: 40 ft Roadway Width: 40 ft Main Spans: 1 |
1959 By: Erickson Trucking Service Company and Michigan State Highway Department | A relatively early pre-stressed concrete bridge in Michigan. | 
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Main Street Bridge
|
 | Main Street (Old M-61) Over Middle Branch River | Marion: Osceola County, Michigan | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 27 ft Main Span Length: 25 ft Roadway Width: 87 ft Main Spans: 1 |
1939 By: Unknown | This is a tiny concrete arch bridge. | 
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