| 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 |
Blue Water Bridge
Original/Westbound Span |
 | I-69 and I-94 / KH-402 Over St. Clair River | Port Huron and Sarnia (Point Edward): St. Clair County, Michigan and Lambton County, Ontario | Metal Cantilever (Arched) Rivet-Connected Polygonal Warren Through Truss, Fixed and Approach Spans: Metal Rivet-Connected Warren Deck Truss, Fixed |
Total Length: 6178 ft Main Span Length: 871 ft Roadway Width: 32 ft Main Spans: 3 |
1938 By: American Bridge Company of New York, New York and Modjeski and Masters | Designed by Modjeski and Masters, this monumental bridge features an extremely rare shape of cantilever and continues to carry unimaginable traffic. | 
|
Cameron Road Bridge
|
 | Cameron Road Over Sydenham River | Rural: Lambton County, Ontario | Metal 8 Panel Rivet-Connected Double-Intersection Warren Through Truss, Fixed | Main Spans: 1 | By: Unknown | A scenic rural truss bridge with a highly unusual modified double-intersection Warren truss configuration. | 
| X |
Christina Street Bridge
|
 | Christina Street Over KH-402 | Sarnia: Lambton County, Ontario | Concrete Rigid-Frame, Fixed |
Total Length: 210.9 ft Main Span Length: 53.2 ft Roadway Width: 44 ft Main Spans: 2 |
1951 By: Unknown | Ontario elected to demolish this stunning historic gateway, one of the last of its kind on Ontario roads. | 
|
CR-79 Bridge
|
 | CR-79 Over Sydenham River | Rural: Lambton County, Ontario | Metal 8 Panel Rivet-Connected Camelback Through Truss, Fixed | Main Spans: 1 | 1957 By: Unknown | A beautiful and relatively young massive steel through truss bridge. | 
|
Holt Line Bridge
Duthil Bridge |
 | Holt Line Over North Branch Sydenham River | Rural: Lambton County, Ontario | Metal 7 Panel Rivet-Connected Parker Through Truss, Fixed | Main Spans: 1 | 1951 By: Unknown | One of the most spectacular bridges in the county, both rare and beautiful! | 
|
KH-21 Bridge
|
 | KH-21 Over Ausable River Cut | Rural: Lambton County, Ontario | Metal 6 Panel Bolt-Connected Polygonal Warren Pony Truss, Fixed | Main Spans: 1 | 1963 By: Unknown | An example of late metal truss bridge construction, this bridge was restored. | 
|
Old Lakeshore Road Bridge
|
 | Old Lakeshore Road Over Cull Drain (Perch Creek) | Sarnia: Lambton County, Ontario | Metal 7 Panel Rivet-Connected Polygonal Warren Pony Truss, Fixed |
Main Span Length: 100 ft Roadway Width: 16 ft Main Spans: 1 |
1910 By: Jenks-Dresser Company of Sarnia, Ontario | A beautiful pony truss is complimented by Lake Huron in the background, forming a unique, breathtaking scene. | 
|
Pretty Road Bridge
|
| Pretty Road Over Black Creek | Rural: Lambton County, Ontario | Metal 6 Panel Rivet-Connected Warren Pony Truss, Fixed | Main Spans: 1 | By: Unknown | Appropriately, this is a pretty little bridge on Pretty Road! | 
|
St. Clair Parkway Bridge
|
 | St. Clair Parkway (CR-33) Over Clay Creek | Rural: Lambton County, Ontario | Concrete Rigid-Frame, Fixed | Main Spans: 1 | 1965 By: Unknown | This bridge is a good representation of Ontario's frequently built concrete rigid-frame bridge design. | 
|
Stanley Line Bridge
|
| Stanley Line Over Bear Creek | Rural: Lambton County, Ontario | Metal 8 Panel Rivet-Connected Warren Pony Truss, Fixed | Main Spans: 1 | By: Unknown | A classic Warren pony truss with riveted connections beautifies an agricultural landscape in Ontario. | 
|
Warwick Bridge
|
| London Road (CR-7) Over Bear Creek | Warwick: Lambton County, Ontario | Concrete Rainbow Through Arch, Fixed |
Main Span Length: 64.5 ft Main Spans: 1 |
1931 By: Unknown | This graceful rainbow arch bridge was rehabilitated. | 
|
Whitebread Line Drain Bridge
|
 | St. Clair Parkway (CR-33) Over Whitebread Drain | Rural: Lambton County, Ontario | Concrete Rigid-Frame, Fixed | Main Spans: 1 | 1934 By: Unknown | A small rigid-frame bridge provides beauty and interest to a scenic route. | 
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