| 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 |
Chappel Hill Road Bridge
|
 | Chappel Hill Road (TR-355) Over Caldwell Creek | Rural: Warren County, Pennsylvania | Metal 3 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 43 ft Main Span Length: 40 ft Roadway Width: 13.8 ft Main Spans: 1 |
1910 By: Unknown | A little Warren pony truss hidden away on a quiet country road. | 
| X |
Flat Road Bridge
|
 | Flat Road (TR-304) Over West Branch Caldwell Creek | Rural: Warren County, Pennsylvania | Metal 4 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 54 ft Main Span Length: 51.8 ft Roadway Width: 11.8 ft Main Spans: 1 |
1910 By: Unknown | This was an abandoned Warren pony truss that was noted for its skew. | 
|
Tidioute Bridge
|
 | Buckingham Street (PA-127) Over Allegheny River | Tidioute: Warren County, Pennsylvania | Metal 10 Panel Rivet-Connected Parker Through Truss, Fixed |
Total Length: 551 ft Main Span Length: 270 ft Roadway Width: 24 ft Main Spans: 2 |
1933 By: Bates and Rogers of Chicago, Illinois and Pennsylvania State Highway Department | Extensive lattice and v-lacing, and impressive span size make this a complex structure. | 
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