| 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 | X |
6th Street Bridge
|
 | 6th Street (PA-403, Penn Street) Over Two Lick Creek | Clymer: Indiana County, Pennsylvania | Metal 9 Panel Rivet-Connected Parker Pony Truss, Fixed |
Total Length: 122 ft Main Span Length: 118 ft Roadway Width: 32.2 ft Main Spans: 1 |
1934 By: M. Bennett and Sons and Pennsylvania State Highway Department | The only bridge with historic value in Clymer, this attractive bridge was sentenced to the scrapyard. | 
|
Bairdstown Bridge
Old Blairsville Bridge |
 | Market Street (PA-2002) Over Conemaugh River | Blairsville: Indiana County, Pennsylvania and Westmoreland County, Pennsylvania | Metal 20 Panel Rivet-Connected Baltimore Through Truss, Fixed and Approach Spans: Metal Through Girder, Fixed |
Total Length: 358 ft Main Span Length: 290 ft Roadway Width: 30.8 ft Main Spans: 1 |
1935 By: Freeland McHale and PA and Pennsylvania State Highway Department | This bridge features a Baltimore truss configuration unlike other period bridges in the state. | 
| X |
Dilltown Bridge
|
 | PA-403 Over Black Lick Creek | Dilltown: Indiana County, Pennsylvania | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 155 ft Main Span Length: 72 ft Roadway Width: 18 ft Main Spans: 2 |
1924 By: Farris Bridge Company of Pittsburgh, Pennsylvania | A lack of maintainance has caused severe spalling on this once-proud structure. | 
|
Heshbon Bridge
|
 | PA-259 Over Black Lick Creek | Heshbon (Rural): Indiana County, Pennsylvania | Metal 7 Panel Rivet-Connected Parker Through Truss, Fixed |
Total Length: 158 ft Main Span Length: 153 ft Roadway Width: 26 ft Main Spans: 1 |
1941 By: Paul Construction Company and Pennsylvania State Highway Department | This standard plan bridge is a relatively small example of its type, but retains original railings. | 
|
River Road Bridge
|
| River Road (PA-2012) Over Mardis Run | Near Dilltown: Indiana County, Pennsylvania | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 36 ft Main Span Length: 33 ft Roadway Width: 19.7 ft Main Spans: 1 |
1919 By: C. E. Almond | A small, but attractive arch bridge also has arched railings. | 
|
Seward Bridge
|
| PA-56 and PA-711 Over Conemaugh River | Seward: Indiana County, Pennsylvania and Westmoreland County, Pennsylvania | Metal 9 Panel Rivet-Connected Parker Through Truss, Fixed |
Total Length: 377 ft Main Span Length: 183 ft Roadway Width: 30 ft Main Spans: 2 |
1933 By: Unknown and Pennsylvania State Highway Department | This bridge is a multi-span example of a standard plan truss in Pennsylvania. | 
|
Shelocta Bridge
|
| PA-56 Over Crooked Creek | Shelocta: Indiana County, Pennsylvania | Metal 8 Panel Rivet-Connected Polygonal Warren (No Verticals) Pony Truss, Fixed |
Total Length: 119 ft Main Span Length: 111 ft Roadway Width: 22.3 ft Main Spans: 1 |
1929 By: American Bridge Company of New York, New York and Pennsylvania State Highway Department | Today the oldest highway truss in the county, this bridge is a rare example of a standard plan polygonal Warren pony truss in Pennsylvania. | 
| X |
Tunnelton Bridge
|
 | Tunnelton Road (PA-3003) Over Conemaugh River | Rural: Indiana County, Pennsylvania and Westmoreland County, Pennsylvania | Metal 12 Panel Multiple-Type-Connected Pennsylvania Through Truss, Fixed |
Total Length: 402 ft Main Span Length: 396 ft Roadway Width: 21.7 ft Main Spans: 1 |
1938 By: American Bridge Company of New York, New York | This bridge has some very unusual details and is also noteworthy for its long single span. | 
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