| 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 |
Bennies Hill Road Bridge
|
 | Bennies Hill Road Over Catoctin Creek | Rural: Frederick County, Maryland | Metal 10 Panel Bowstring Pony Truss, Fixed |
Total Length: 94.2 ft Main Span Length: 94.2 ft Roadway Width: 13 ft Main Spans: 1 |
1879 By: King Bridge Company of Cleveland, Ohio | This extremely significant bridge documents the unique designs of its builder very well. | 
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Blacks Mill Road Bridge
|
 | Blacks Mill Road Over Hunting Creek | Rural: Frederick County, Maryland | Metal 4 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 70 ft Main Span Length: 69.3 ft Roadway Width: 12.8 ft Main Spans: 1 |
1914 By: York Bridge Company of York, Pennsylvania | A small, late pin-connected pony truss with a distinctive railing design. | 
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Bullfrog Road Bridge
|
 | Bullfrog Road Over Monocacy River | Rural: Frederick County, Maryland | Metal 9 Panel Pin-Connected Parker Through Truss, Fixed |
Total Length: 183 ft Main Span Length: 179 ft Roadway Width: 13 ft Main Spans: 1 |
1908 By: York Bridge Company of York, Pennsylvania | This bridge is an impressive example of its type, and the only one in the county. | 
|
Burkittsville Road Bridge
Green Bridge |
| Burkittsville Road Over Catoctin Creek | Rural: Frederick County, Maryland | Metal 7 Panel Rivet-Connected Pratt Through Truss, Fixed |
Total Length: 146 ft Main Span Length: 140 ft Roadway Width: 30 ft Main Spans: 1 |
1934 By: Roanoke Iron and Bridge Works of Roanoke, Virginia | Skewed, this bridge is also a good example of a standard plan truss in Maryland. | 
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Church Hill Road Bridge
|
 | Church Hill Road Over Middle Creek | Rural: Frederick County, Maryland | Metal 4 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 65 ft Main Span Length: 65 ft Roadway Width: 11.5 ft Main Spans: 1 |
1908 By: York Bridge Company of York, Pennsylvania | This bridge has a builder plaque that is upside down! | 
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Crow Rock Road Bridge
|
 | Crow Rock Road Over Middle Creek | Rural: Frederick County, Maryland | Metal 5 Panel Pin-Connected Pratt Full-Slope Pony Truss, Fixed |
Total Length: 80 ft Main Span Length: 75 ft Roadway Width: 12.8 ft Main Spans: 1 |
1897 By: Groton Bridge Company of Groton, New York | Featuring a nice builder plaque, this bridge was built partly on a natural rock outcropping. | 
|
Fourpoints Bridge
|
 | Keysville Road Over Toms Creek | Rural: Frederick County, Maryland | Metal 8 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 103 ft Main Span Length: 103 ft Roadway Width: 12.8 ft Main Spans: 1 |
1876 By: Wrought Iron Bridge Company of Canton, Ohio | An incredible, textbook example of an early Wrought Iron Bridge Company bridge. | 
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Grimes Road Bridge
|
 | Grimes Road Over Toms Creek | Rural: Frederick County, Maryland | Metal 7 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 112 ft Main Span Length: 112 ft Roadway Width: 12.5 ft Main Spans: 1 |
1914 By: York Bridge Company of York, Pennsylvania | A traditionally composed, late example of an attractive historic bridge type. | 
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LeGore Bridge
|
| LeGore Bridge Road Over Monocacy River | Rural: Frederick County, Maryland | Stone Segmental Deck Arch, Fixed |
Total Length: 248 ft Main Span Length: 63 ft Roadway Width: 18.4 ft Main Spans: 5 |
1903 By: James William LeGore | This large stone bridge is the only one of its kind in the county. | 
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Mount Tabor Station Bridge
|
 | Station Road Over Catoctin Creek | Rural: Frederick County, Maryland | Metal 5 Panel Pin-Connected Pratt Full-Slope Pony Truss, Fixed |
Total Length: 62 ft Main Span Length: 60 ft Roadway Width: 13.5 ft Main Spans: 1 |
By: Unknown | An attractive bridge that is traditionally composed. | 
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Mumma Ford Bridge
|
 | Mumma Ford Road Over Monocacy River | Rural: Frederick County, Maryland and Carroll County, Maryland | Metal 6 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 229 ft Main Span Length: 114 ft Roadway Width: 12.5 ft Main Spans: 2 |
1911 By: York Bridge Company of York, Pennsylvania | This two-span truss had an arch retrofit added to the superstructure. | 
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Old Mill Road Bridge
|
 | Old Mill Road Over Owens Creek | Rural: Frederick County, Maryland | Metal 5 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 69 ft Main Span Length: 69 ft Roadway Width: 13 ft Main Spans: 1 |
1882 By: Pittsburgh Bridge Company of Pittsburgh, Pennsylvania | An extremely old example of an important, regionally prolific bridge company. | 
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Poffenberger Road Bridge
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| Poffenberger Road Over Catoctin Creek | Rural: Frederick County, Maryland | Metal 9 Panel Pin-Connected Whipple Through Truss, Fixed |
Total Length: 126 ft Main Span Length: 123 ft Roadway Width: 13.5 ft Main Spans: 1 |
1878 By: Penn Bridge Company of Beaver Falls, Pennsylvania | A truly rare and ancient bridge with distinctive details of its builder. | 
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Sixes Bridge
|
| Sixes Bridge Road Over Monocacy River | Rural: Frederick County, Maryland and Carroll County, Maryland | Metal 7 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 240 ft Main Span Length: 119 ft Roadway Width: 15 ft Main Spans: 2 |
1910 By: York Bridge Company of York, Pennsylvania | A very photogenic two-span through truss bridge. | 
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Spoolsville Bridge
|
| Old National Pike (US-40 ALT) Over Catoctin Creek | Rural: Frederick County, Maryland | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 85 ft Main Span Length: 85 ft Roadway Width: 24 ft Main Spans: 1 |
1923 By: Unknown | An attractive concrete arch bridge adds beauty to a historic route. | 
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Stevens Road Bridge
|
| Stevens Road Over Hunting Creek | Rural: Frederick County, Maryland | Metal 5 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 97 ft Main Span Length: 95 ft Roadway Width: 12.8 ft Main Spans: 1 |
1890 By: York Bridge Company of York, Pennsylvania | This was the first of many historic truss bridges to be preserved in the county. | 
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Sumantown Road Bridge
|
| Sumantown Road Over Catoctin Creek | Rural: Frederick County, Maryland | Metal 6 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 101 ft Main Span Length: 95 ft Roadway Width: 14.8 ft Main Spans: 1 |
1899 By: Pencoyd Iron Works of Pencoyd, Pennsylvania | This traditional bridge includes beautiful lattice railings with flower motifs. | 
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