| 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 |
Bear Creek Bridge
Knox Road Bridge | Knox Road Over South Branch Bear Creek | Rural: Armstrong County, Pennsylvania and Butler County, Pennsylvania | Metal Riveted Warren Pony Truss, Stationary | 1913 By: Farris Bridge Company of Pittsburgh, Pennsylvania | A beautiful Warren pony truss in a hilly forest setting. | 
| X |
Caldwell Bridge
Hoon Road Bridge | Hoon Road Over Connoquenessing Creek | Rural: Butler County, Pennsylvania | Metal Riveted Pratt Half-Hip Pony Truss, Stationary | 1902 By: Unknown | Representing the transition from pinned to riveted connections, this extremely early example of a riveted Pratt pony truss was demolished! | 
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Jefferson Street Bridge
| Jackson Street Over Buffalo and Pittsburgh Railroad Yard | Butler: Butler County, Pennsylvania | Metal Riveted Pratt Through Truss, Stationary | 1937 By: Unknown | This massive-membered truss bridge is unique because its two main spans are separate from each other. | 
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Wayne Street Viaduct
| Wayne Street (PA-356) Over Railroad (B&LE RR, B&P RR), Connoquenessing Creek, Cliff Street | Butler: Butler County, Pennsylvania | Metal Deck Girder, Stationary | 1915 By: Fort Pitt Bridge Works of Pittsburgh, Pennsylvania | A very long plate girder viaduct with attractive v-laced supports is up for demolition. | 
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