| 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 |
Alec Johnson Road Bridge
Johnson Road Bridge |
 | Alec Johnson Road (Johnson Road) Over Whitefish River | Rural: Alger County, Michigan | Metal 3 Panel Rivet-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 42 ft Main Span Length: 40 ft Roadway Width: 16 ft Main Spans: 1 |
1910 By: Unknown | This is a small pony truss that retains excellent historic integrity. | 
|
Armour Saari Road Bridge
|
 | Armour Saari Road Over Whitefish River | Rural: Alger County, Michigan | Metal 4 Panel Bolt-Connected Double-Intersection Warren Pony Truss, Fixed |
Total Length: 65 ft Main Span Length: 63 ft Roadway Width: 16 ft Main Spans: 1 |
1906 By: Joliet Bridge and Iron Company of Joliet, Illinois | This bridge is a good example of work done by a company that was prolific in Michigan. | 
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Au Train River Railroad Bridge
|
 | Railroad (Coalwood Trail Rail-Trail) Over Au Train River | Rural: Alger County, Michigan | Concrete Closed Spandrel Deck Arch, Fixed | Main Spans: 1 | 1920 By: Unknown | This is a small railroad arch bridge next to a highway arch bridge and a dam. | 
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Diffin Road Bridge
|
| Diffin Road Over Werners Creek | Rural: Alger County, Michigan | Metal 2 Panel Rivet-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 30 ft Main Span Length: 26 ft Roadway Width: 16 ft Main Spans: 1 |
1906 By: Unknown | This bridge is just about as small as a Pratt truss can be, and it is in danger of collapse. | 
|
King Road Bridge
|
 | King Road (CR-280 and Old US-41) Over Whitefish River | Rural: Alger County, Michigan | Concrete Through Girder, Fixed |
Total Length: 70 ft Main Span Length: 30.8 ft Roadway Width: 18 ft Main Spans: 2 |
1919 By: Samuel Mills of Escanaba, Michigan and Michigan State Highway Department | A rare example of a multi-span concrete through girder, this bridge was once part of a major highway. | 
| ! |
Kivamaki Road Bridge
|
| Kivamaki Road Over Whitefish River | Rural: Alger County, Michigan | Metal 3 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 46 ft Main Span Length: 44 ft Roadway Width: 15 ft Main Spans: 1 |
1910 By: Continental Bridge Company of Chicago and Peotone, Illinois | A beautiful little truss bridge is a rare example of work by Continental Bridge Company. | 
|
M-28 Sand River Bridge
|
 | M-28 Over Sand River | Rural: Alger County, Michigan | Concrete Rigid-Frame, Fixed |
Total Length: 66 ft Main Span Length: 66 ft Roadway Width: 35 ft Main Spans: 1 |
1939 By: Alpine Excavating Company of St. Ignace, Michigan and Michigan State Highway Department | Rare in Michigan, this attractive structure mimics a design used with frequency in Ontario. | 
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M-94 Au Train River Bridge
|
| M-94 Over Au Train River | Rural: Alger County, Michigan | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 47 ft Main Span Length: 47 ft Roadway Width: 38 ft Main Spans: 1 |
1919 By: Unknown | This is small arch bridge next to a dam and a railroad bridge. | 
|
Trenary Bridge
|
 | M-67 Over Scotts Creek | Trenary: Alger County, Michigan | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 45 ft Main Span Length: 45 ft Roadway Width: 38 ft Main Spans: 1 |
1914 By: Straits Construction Company | This is an old arch bridge that was widened in the 1950s, so it looks like a 1950s arch bridge today. | 
|
Woodland Road Bridge
|
 | Woodland Road Over Au Train River | Rural: Alger County, Michigan | Metal Through Girder, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed |
Total Length: 90 ft Main Span Length: 61 ft Roadway Width: 16 ft Main Spans: 1 |
1914 By: Worden-Allen Company of Milwaukee, Wisconsin and Michigan State Highway Department | This bridge is an extremely rare example of a state highway department standard highway plate girder. | 
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