| 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 |
Cone Road Private Bridge
|
 | Private Drive Over Cone Road Drain | Rural: Monroe County, Michigan | Metal Stringer (Multi-Beam), Fixed | Main Spans: 1 | By: Unknown | This example of a stringer bridge with lattice railing serves a driveway. | 
|
Day Road Bridge
|
| Day Road Over Saline River | Rural: Monroe County, Michigan | Metal Deck Girder, Fixed |
Total Length: 59.7 ft Main Span Length: 58.7 ft Roadway Width: 21 ft Main Spans: 1 |
1937 By: Unknown | This is a deck plate girder which uses rolled beams instead of built-up beams. | 
|
Dunbar Road Bridge
|
 | Dunbar Road Over I-75 | Rural: Monroe County, Michigan | Concrete Continuous Curved T-Beam, Fixed |
Total Length: 236 ft Main Span Length: 70 ft Roadway Width: 26 ft Main Spans: 4 |
1955 By: W. H. Knapp Company of Monroe, Michigan and Michigan State Highway Department | One of two curved t-beam expressway overpasses in Michigan listed on the National Register of Historic Places. | 
|
Dundee Railroad Bridge
|
 | Railroad (Ann Arbor Railroad) Over River Raisin | Dundee: Monroe County, Michigan | Metal 5 Panel Rivet-Connected Pratt Through Truss, Fixed |
Total Length: 250 ft Main Span Length: 120 ft Roadway Width: 12 ft Main Spans: 1 |
1922 By: American Bridge Company of New York, New York | This through truss also has some plate girder approaches, and the main truss span is supported by unusual caissons. | 
| S |
Half Road Bridge
|
 | Half Road Over North Branch Macon Creek | Rural: Monroe County, Michigan | Metal 3 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 41 ft Main Span Length: 36.7 ft Roadway Width: 14 ft Main Spans: 1 |
1910 By: Unknown | This small rural pony truss was not just tucked in the trees... it had a tree growing through a part of it! | 
|
Hurd Road Bridge
|
 | Hurd Road Over I-75 | Rural: Monroe County, Michigan | Concrete Continuous Curved T-Beam, Fixed |
Total Length: 252 ft Main Span Length: 74.2 ft Roadway Width: 26 ft Main Spans: 4 |
1954 By: W. H. Harvie and Michigan State Highway Department | One of several remaining curved t-beams on this section of freeway that are the oldest of their kind in the state. | 
|
I-75 River Raisin Bridge
|
 | I-75 Over River Raisin | Monroe: Monroe County, Michigan | Metal Deck Girder, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed |
Total Length: 930.2 ft Main Span Length: 157.8 ft Roadway Width: 109 ft Main Spans: 3 |
1955 By: Walter Toebe Company and Michigan State Highway Department | This relatively long plate girder bridge is significant as a large bridge on an early freeway. | 
|
James Road Bridge
|
 | James Road Over Stony Creek | Rural: Monroe County, Michigan | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 82 ft Main Span Length: 67 ft Roadway Width: 15.7 ft Main Spans: 1 |
1920 By: Unknown | A shallow, simple arch has been abandoned for many years and has badly deteriorated over the years. | 
|
Jefferson Avenue Bridge
Jefferson Avenue - Harbin Drive Bridge |
| Jefferson Avenue Over Huron River | Rural: Wayne County, Michigan and Monroe County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 165 ft Main Span Length: 54.8 ft Roadway Width: 36 ft Main Spans: 1 |
1931 By: W. J. Anschutz of Saginaw, Michigan and Michigan State Highway Department | This bridge and the Harbin Drive bridge are joined together to form the appearance of a single bridge. | 
| S |
Kimpton Road Bridge
|
| Kimpton Road Over South Branch Macon Creek | Rural: Monroe County, Michigan | Metal 3 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 38.7 ft Main Span Length: 36.7 ft Roadway Width: 15.4 ft Main Spans: 1 |
By: Unknown | This is a very attractive half-hip pin connected Pratt pony truss with high clearance above the creek. | 
|
M-50 Railroad Overpass
|
 | Railroad (Canadian National) Over M-50 | Rural: Monroe County, Michigan | Metal Deck Girder, Fixed |
Total Length: 62 ft Main Span Length: 62 ft Main Spans: 1 |
1926 By: Unknown | One of three concrete encased deck plate girder overpasses on this stretch of railroad in Monroe and Lenawee Counties. | 
| X |
Macomb Street Bridge
|
| Macomb Street Over River Raisin | Monroe: Monroe County, Michigan | Concrete Continuous Curved T-Beam, Fixed |
Total Length: 230 ft Main Span Length: 94.2 ft Roadway Width: 42 ft Main Spans: 3 |
1952 By: Unknown | An uncommon example of a curved t-beam bridge which crosses a waterway. | 
|
Milan Oakville Road Bridge
|
 | Milan Oakville Road Over US-23 | Milan: Monroe County, Michigan and Washtenaw County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 143 ft Main Span Length: 79.7 ft Roadway Width: 28 ft Main Spans: 3 |
1950 By: Johnson-Greene Company and Michigan State Highway Department | This overpass predates the freeway it crosses and is also noted for its good historic integrity. | 
| S |
Monk Road North Bridge
|
| Monk Road Over Middle Branch Macon Creek | Rural: Monroe County, Michigan | Metal 3 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 34.8 ft Main Span Length: 32.8 ft Roadway Width: 15.7 ft Main Spans: 1 |
By: Unknown | This is a very short pony truss, one of several small truss bridges from Monroe County. | 
| S |
Monk Road South Bridge
|
 | Monk Road Over South Branch Macon Creek | Rural: Monroe County, Michigan | Metal 3 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 46 ft Main Span Length: 44 ft Roadway Width: 15.7 ft Main Spans: 1 |
By: Unknown | This is one of the longest and oldest of the Monroe County highway truss bridge collection. | 
|
Monroe Canadian National Railroad Bridge
|
| Railroad (Canadian National) Over River Raisin | Monroe: Monroe County, Michigan | Metal 6 Panel Rivet-Connected Warren Through Truss, Fixed |
Total Length: 420 ft Main Span Length: 130 ft Roadway Width: 24 ft Main Spans: 3 |
1912 By: American Bridge Company of New York, New York | Sitting next to the Norfolk Southern Bridge, this bridge is itself an impressive three-span through truss bridge. | 
|
Monroe CSX Railroad Bridge
|
| Railroad (CSX) Over River Raisin | Monroe: Monroe County, Michigan | Metal 6 Panel Rivet-Connected Warren Through Truss, Fixed |
Total Length: 330 ft Main Span Length: 165 ft Roadway Width: 30 ft Main Spans: 2 |
1911 By: American Bridge Company of New York, New York | Resting on 1896 stone abutments, this is an impressive two-span through railroad truss with attractive portal bracing. | 
|
Monroe Norfolk Southern Railroad Bridge
|
 | Railroad (Norfolk Southern) Over River Raisin | Monroe: Monroe County, Michigan | Metal 8 Panel Pin-Connected Baltimore Through Truss, Fixed |
Total Length: 353 ft Roadway Width: 15 ft Main Spans: 3 |
1910 By: Unknown | This spectacular bridge is not only impressive to the eye, it is also a rare pinned Baltimore truss. | 
|
Nadeau Road Bridge
|
| Nadeau Road Over I-75 | Rural: Monroe County, Michigan | Concrete Continuous Curved T-Beam, Fixed |
Total Length: 262.8 ft Main Span Length: 77.8 ft Roadway Width: 26 ft Main Spans: 4 |
1954 By: Louis Caravaglia and Michigan State Highway Department | One of several remaining curved t-beams on this section of freeway that are the oldest of their kind in the state. | 
|
North Custer Road Railroad Overpass
|
| Railroad (Canadian National) Over North Custer Road | Rural: Monroe County, Michigan | Metal Deck Girder, Fixed |
Total Length: 61.4 ft Main Span Length: 47 ft Main Spans: 1 |
1925 By: Unknown | One of three concrete encased deck plate girder overpasses on this stretch of railroad in Monroe and Lenawee Counties. | 
| ! |
Oelke Road Bridge
|
| Oelke Road Over North Branch Macon Creek | Rural: Monroe County, Michigan | Metal 4 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 51.8 ft Main Span Length: 51.8 ft Roadway Width: 13.5 ft Main Spans: 1 |
1899 By: Groton Bridge Company of Groton, New York | This is the oldest and largest of the Monroe County pony trusses, and retains original pole guardrails. | 
|
Old Telegraph Road Bridge
|
 | Abandoned Alignment of US-24 (Telegraph Road) Over Stony Creek | Rural: Monroe County, Michigan | Concrete Through Girder, Fixed | Main Spans: 2 | By: Unknown and Michigan State Highway Department | This abandoned bridge likely has an interesting history and is an extremely rare multi-span concrete through girder. | 
|
Ottawa Lake Road Bridge
|
| Ottawa Lake Road Over Ottawa Lake Drain | Rural: Monroe County, Michigan | Concrete Through Girder, Fixed |
Total Length: 30.8 ft Main Span Length: 30 ft Roadway Width: 21 ft Main Spans: 1 |
By: Unknown and Michigan State Highway Department | A small example of a concrete straight chord through girder in Michigan in decent condition. | 
|
Pherdon Road Private Bridge
|
 | Private Access Over South Branch Macon Creek | Rural: Monroe County, Michigan | Metal 3 Panel Rivet-Connected Warren Bedstead Pony Truss, Fixed | Main Spans: 1 | By: Unknown | This extremely unusual bridge has inclined end posts riveted to vertical beams that support the truss like a bedstead. | 
|
Ready Road Bridge
|
| Ready Road Over I-75 | Rural: Monroe County, Michigan | Concrete Continuous Curved T-Beam, Fixed |
Total Length: 302.8 ft Main Span Length: 90 ft Roadway Width: 26 ft Main Spans: 4 |
1956 By: Unknown and Michigan State Highway Department | One of several remaining curved t-beams on this section of freeway that are the oldest of their kind in the state. | 
|
Rockwood Railroad Bridge
|
| Railroad (Norfolk Southern) Over Huron River | Rockwood: Wayne County, Michigan and Monroe County, Michigan | Metal 10 Panel Rivet-Connected Baltimore Through Truss, Fixed | Main Spans: 1 | By: Unknown | A nice railroad through truss with unusual portal bracing and deck plate girder approaches. | 
| S |
Sherman Road Bridge
|
| Sherman Road Over North Branch Macon Creek | Rural: Monroe County, Michigan | Metal 3 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 40 ft Main Span Length: 37.7 ft Roadway Width: 13.5 ft Main Spans: 1 |
By: Unknown | One of several abandoned small pony truss bridges in the county, this bridge is noted for its wooden railing. | 
|
Sigler Road Bridge
|
| Sigler Road Over I-75 | Rural: Monroe County, Michigan | Concrete Continuous Curved T-Beam, Fixed |
Total Length: 261.8 ft Main Span Length: 77.8 ft Roadway Width: 26 ft Main Spans: 4 |
1954 By: Unknown and Michigan State Highway Department | This is an unmodified example of a historic curved t-beam, an old example that actually predates the official Interstate system. | 
| X |
U.S. Turnpike Bridge
|
 | U.S. Turnpike Over Mouillee Creek | Rural: Monroe County, Michigan | Metal Stringer (Multi-Beam), Fixed |
Total Length: 45 ft Main Span Length: 43 ft Roadway Width: 35.8 ft Main Spans: 1 |
1927 By: Unknown and Michigan State Highway Department | This is an early example of a late 1920s and 1930s bridge that carries a lot of truck traffic. | 
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