| 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 |
Ausable Road Bridge
|
 | Ausable Road Over Ausable River | Rural: Middlesex County, Ontario | Metal 4 Panel Rivet-Connected Warren Pony Truss, Fixed | Main Spans: 1 | 1900 By: Hamilton Bridge Company of Hamilton, Ontario | A lightweight pony truss bridge built by the Hamilton Bridge Works in the first decade of the 20th century. | 
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Barklay Boulevard Bridge
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 | Barklay Boulevard Over Sydenham River | Rural: Middlesex County, Ontario | Metal 4 Panel Rivet-Connected Warren Pony Truss, Fixed | Main Spans: 1 | By: Unknown | An abandoned former trunkline pony truss bridge with poor deck condition. | 
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Blackfriars Street Bridge
|
 | Blackfriars Street Over North Branch Thames River | London: Middlesex County, Ontario | Metal 16 Panel Bowstring Through Truss, Fixed |
Total Length: 225 ft Main Span Length: 225 ft Main Spans: 1 |
1875 By: Wrought Iron Bridge Company of Canton, Ohio | Among the rarest and oldest bridges in Canada is this breathtaking iron bowstring truss which is the longest span of its kind remaining in all of North America! | 
|
Corner Drive Bridge
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| Corner Drive Over Ausable River | Rural: Middlesex County, Ontario | Metal 7 Panel Rivet-Connected Pratt Through Truss, Fixed | Main Spans: 1 | By: Unknown | This classic riveted truss bridge looks nice in its coat of white paint. | 
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CP Railroad Private Overpass
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 | Private Drive Over Railroad (Canadian Pacific) | London: Middlesex County, Ontario | Wood Stringer (Multi-Beam), Fixed | Main Spans: 5 | By: Unknown | An unaltered example of a wooden railroad grade separation. | 
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CR-74 Bridge
|
 | CR-74 Over KH-401 | Rural: Middlesex County, Ontario | Concrete Rigid-Frame, Fixed | Main Spans: 1 | 1956 By: Unknown | One of a number of remaining attractive overpasses with good historic integrity. | 
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Dorchester Bridge
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 | Bridge Street Over South Branch Thames River | Dorchester: Middlesex County, Ontario | Metal 6 Panel Rivet-Connected Warren Deck Truss, Fixed | Main Spans: 1 | 1923 By: Unknown | This bridge is an uncommon example of a highway deck truss in Ontario. | 
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Dorchester Road Bridge
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| Dorchester Road Over KH-401 | Rural: Middlesex County, Ontario | Concrete Rigid-Frame, Fixed | Main Spans: 1 | 1955 By: Unknown | One of a number of remaining similar structures, this bridge is both old and unusual as an attractive expressway overpass. | 
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Elgin Road Bridge
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| Elgin Road (KH-73) Over KH-401 | Rural: Middlesex County, Ontario | Concrete Rigid-Frame, Fixed | Main Spans: 1 | 1957 By: Unknown | One of a number of remaining similar structures, this bridge is both old and unusual as an attractive expressway overpass. | 
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Franks Lane Bridge
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 | Franks Lane Over Railroad (Canadian National) | London: Middlesex County, Ontario | Wood 2 Panel Kingpost Pony Truss, Fixed and Approach Spans: Wood Stringer (Multi-Beam), Fixed | Main Spans: 1 | By: Unknown | This unusual wooden bridge is a rare example of a kingpost pony truss. | 
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Glanworth Drive Bridge
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 | Glanworth Drive Over KH-401 | Tempo (Rural): Middlesex County, Ontario | Concrete Rigid-Frame, Fixed | Main Spans: 1 | By: Unknown | This beautiful vintage overpass stands out among the few surviving bridges of this type because of its skew. | 
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