| 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 |
Adams Road Bridge
|
 | Adams Road Over Bush Creek | Rural: Gratiot County, Michigan | Concrete Through Girder, Fixed |
Total Length: 46 ft Main Span Length: 40 ft Roadway Width: 16 ft Main Spans: 1 |
1930 By: Unknown | The smaller of two nearby bridges that have an unusual, primitive design to them unlike other Michigan girders. | 
|
Barry Road Beaver Creek Bridge
|
 | Barry Road Over Beaver Creek | Rural: Gratiot County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 45 ft Main Span Length: 42 ft Roadway Width: 23 ft Main Spans: 1 |
1949 By: Unknown and Michigan State Highway Department | A small steel stringer bridge with attractive Michigan type R4 railing. | 
|
Barry Road Shad Creek Bridge
|
| Barry Road Over Shad Creek | Rural: Gratiot County, Michigan | Concrete T-Beam, Fixed |
Total Length: 34.8 ft Main Span Length: 33.8 ft Roadway Width: 23 ft Main Spans: 1 |
1957 By: Unknown and Michigan State Highway Department | A late example of a small scale t-beam bridge. | 
|
Buchanan Road Bridge
|
 | Buchanan Road Over Drain Number 294 | Rural: Gratiot County, Michigan | Concrete T-Beam, Fixed |
Total Length: 30 ft Main Span Length: 29 ft Roadway Width: 23 ft Main Spans: 1 |
1952 By: Unknown and Michigan State Highway Department | A representative example of 1950s small scale concrete bridge construction. | 
|
Grant Road Bridge
|
 | Grant Road Over Pine Creek | Rural: Gratiot County, Michigan | Concrete 60 Foot Plan Curved Chord Through Girder, Fixed |
Total Length: 60 ft Main Span Length: 54.8 ft Roadway Width: 7 ft Main Spans: 1 |
1927 By: Unknown and Michigan State Highway Department | This bridge an excellent example of a 60 foot camelback bridge. | 
|
Jefferson Road Bridge
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| Jefferson Road Over Bush Creek | Rural: Gratiot County, Michigan | Concrete Through Girder, Fixed |
Total Length: 36.7 ft Main Span Length: 31.8 ft Roadway Width: 16 ft Main Spans: 1 |
1930 By: Unknown | The larger of two nearby bridges that have an unusual, primitive design to them unlike other Michigan girders. | 
| X |
Lincoln Road Bridge
Riverdale Bridge |
| Lincoln Road Over Pine River | Rural: Gratiot County, Michigan | Concrete 90 Foot Plan Curved Chord Through Girder, Fixed |
Total Length: 90 ft Main Span Length: 90 ft Roadway Width: 20 ft Main Spans: 1 |
1922 By: Walter Willets and Michigan State Highway Department | This bridge is one of the worst spalling concrete bridges ever seen, yet still has no posted weight limit. | 
|
Lincoln Road Bridge
|
 | Lincoln Road Over Drain Number 73 | Rural: Gratiot County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 36.7 ft Main Span Length: 31.8 ft Roadway Width: 30 ft Main Spans: 1 |
1930 By: Unknown | Although small, this example of a steel stringer with concrete balustrade railings is in remarkably good condition. | 
|
Main Street Bridge
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| Main Street Over Pine River | St. Louis: Gratiot County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 100 ft Main Span Length: 50 ft Roadway Width: 24 ft Main Spans: 2 |
1955 By: Unknown | This is a well-maintained example of a mid-20th Century steel stringer bridge. | 
|
St. Charles Road Bridge
|
 | St. Charles Road Over Pine River | Rural: Gratiot County, Michigan | Concrete 90 Foot Plan Curved Chord Through Girder, Fixed |
Total Length: 90 ft Main Span Length: 85 ft Roadway Width: 20 ft Main Spans: 1 |
1925 By: Unknown and Michigan State Highway Department | A well-preserved example of a concrete camelback bridge, this is an attractive structure. | 
|
St. Louis High School Bridge
|
 | Pedestrian Walkway Over Pine River | St. Louis: Gratiot County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 92 ft Main Span Length: 34 ft Main Spans: 3 |
By: Unknown | This unusual bridge carries pedestrians both over a river and down a series of stairs. | 
| ! |
Washington Road Bridge
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| Washington Road Over Bad River | Rural: Gratiot County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 19.7 ft Main Span Length: 37.7 ft Roadway Width: 23 ft Main Spans: 2 |
1955 By: Raff and Dexter of Lansing, Michigan and Michigan State Highway Department | This bridge is an example of a trend where bridges with aesthetic value are replaced by bridge devoid of all beauty. | 
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