| 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. |
| 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 | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date / Builder or Contractor | Description | Thumbnail |
Dilltown Bridge
| PA-403 Over Black Lick Creek | Dilltown: Indiana County, Pennsylvania | Concrete Deck Arch, Stationary | 1924 By: Farris Engineering Company of Pittsburgh, Pennsylvania | A lack of maintainance has caused severe spalling on this once-proud structure. | 
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Heshbon Bridge
| PA-259 Over Black Lick Creek | Heshbon (Rural): Indiana County, Pennsylvania | Metal Riveted Parker Through Truss, Stationary | 1941 By: Paul Construction Company | This standard plan bridge is a relatively small example of its type, but retains original railings. | 
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Old Blairsville Bridge
| Market Street Over Conemaugh River | Blairsville: Indiana County, Pennsylvania and Westmoreland County, Pennsylvania | Metal Riveted Baltimore Through Truss, Stationary | 1935 By: Unknown | This bridge features a Baltimore truss configuration unlike other period bridges in the state. | 
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River Road Bridge
| River Road Over Mardis Run | Near Dilltown: Indiana County, Pennsylvania | Concrete Deck Arch, Stationary | 1919 By: C. E. Almond | A small, but attractive arch bridge also has arched railings. | 
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Seward Bridge
| PA-56 and PA-711 Over Conemaugh River | Seward: Indiana County, Pennsylvania and Westmoreland County, Pennsylvania | Metal Riveted Parker Through Truss, Stationary | 1933 By: Unknown | This bridge is a multi-span example of a standard plan truss in Pennsylvania. | 
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Tunnelton Bridge
| Tunnelton Road Over Conemaugh River | Rural: Indiana County, Pennsylvania and Westmoreland County, Pennsylvania | Metal Multiple-Type-Connected Pennsylvania Through Truss, Stationary | 1938 By: Unknown | This bridge has some very unusual details and is also noteworthy for its long single span. | 
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