| 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 |
Church Street Bridge
|
 | Church Street Over Trout Creek | St. Marys: Perth County, Ontario | Stone Segmental Deck Arch, Fixed | Main Spans: 2 | 1884 By: James Clyde and James Elliot | This is a beautifully restored 1880s two-span stone arch bridge that fits right into St. Marys, a town filled with historic stone buildings. | 
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Mill Race Sidewalk Bridge
|
 | Sidewalk Over Mill Race | St. Marys: Perth County, Ontario | Metal Stringer (Multi-Beam), Fixed | Main Spans: 1 | By: Unknown | This tiny beam bridge is mainly interesting for having lattice railings, which speak to its older construction. | 
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Water Street Bridge
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| Water Street Over Trout Creek | St. Marys: Perth County, Ontario | Metal 7 Panel Pin-Connected Pratt Through Truss, Fixed | Main Spans: 1 | By: Unknown | Located in historic St. Marys is this historic truss bridge, adding much beauty and history to a unique town. | 
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Willow Grove Bridge
|
 | KH-23 (164 Road) Over Thames River Tributary | Willow Grove: Perth County, Ontario | Concrete Slab, Fixed | Main Spans: 2 | 1930 By: Unknown | This bridge is an uncommon surviving example of a bridge displaying a standard plan concrete parapet railing design used in Ontario. | 
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