Historic Bridges in Pennsylvania
6,062 bridges built before 1951 in Pennsylvania still in service today.
Bridges Built Before 1951
The United States has 6,062 bridges in Pennsylvania built before 1951 that remain in active service. These structures are 75+ years old, many predate modern engineering codes and were not designed for today's traffic volumes and vehicle weights. The average design life of a bridge is 50 years, making these aging structures a significant infrastructure concern.
| Bridge | State | Condition | Year Built | Age (Years) | ADT |
|---|---|---|---|---|---|
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 6,360 |
| LITTLE WICONISCO CREEK | Pennsylvania | Fair | 1949 | 77 | 243 |
| LAUREL RUN | Pennsylvania | Fair | 1949 | 77 | 29,356 |
| T-380 | Pennsylvania | Fair | 1949 | 77 | 26,550 |
| T-333 | Pennsylvania | Fair | 1949 | 77 | 24,423 |
| IRON RUN | Pennsylvania | Fair | 1949 | 77 | 24,423 |
| LR22072 SR2002 | Pennsylvania | Fair | 1949 | 77 | 24,423 |
| LR22009 SR2007 | Pennsylvania | Good | 1949 | 77 | 24,423 |
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 200 |
| LR22007 PA 743 | Pennsylvania | Fair | 1949 | 77 | 26,550 |
| HOFFERS CREEK | Pennsylvania | Fair | 1949 | 77 | 24,423 |
| T-570 | Pennsylvania | Good | 1949 | 77 | 24,423 |
| CRUM CREEK | Pennsylvania | Fair | 1949 | 77 | 14,523 |
| WHISKEY RUN & SEPTA | Pennsylvania | Fair | 1949 | 77 | 15,844 |
| CHICHESTER ROAD/ 3805-H4 | Pennsylvania | Fair | 1949 | 77 | 18,611 |
| MARKET STREET / 3806-B5 | Pennsylvania | Fair | 1949 | 77 | 32,167 |
| CSX RAILROAD | Pennsylvania | Poor | 1949 | 77 | 32,167 |
| SEPTA | Pennsylvania | Poor | 1949 | 77 | 23,431 |
| LAUREL RUN | Pennsylvania | Fair | 1949 | 77 | 3,617 |
| IRON RUN | Pennsylvania | Fair | 1949 | 77 | 4,741 |
| SR 0051 | Pennsylvania | Good | 1949 | 77 | 3,855 |
| SPEERS RUN | Pennsylvania | Fair | 1949 | 77 | 4,963 |
| MOUNTS CREEK | Pennsylvania | Fair | 1949 | 77 | 526 |
| CRABAPPLE RUN | Pennsylvania | Good | 1949 | 77 | 731 |
| GRASSY RUN | Pennsylvania | Poor | 1949 | 77 | 300 |
| TRIB CONOCOCHEAGUE CR. | Pennsylvania | Fair | 1949 | 77 | 14,284 |
| Conococheague Creek | Pennsylvania | Poor | 1949 | 77 | 437 |
| MUDDY CREEK | Pennsylvania | Fair | 1949 | 77 | 220 |
| SR 1010 RR JUNIATA RIV | Pennsylvania | Fair | 1949 | 77 | 9,540 |
| WARRIORS MARK RUN | Pennsylvania | Fair | 1949 | 77 | 925 |
| HILL VALLEY CREEK | Pennsylvania | Fair | 1949 | 77 | 2,380 |
| PINE RUN | Pennsylvania | Fair | 1949 | 77 | 174 |
| HUNTERS CREEK | Pennsylvania | Fair | 1949 | 77 | 3,498 |
| LININGERS RUN | Pennsylvania | Fair | 1949 | 77 | 776 |
| LACKAWANNA RIVER | Pennsylvania | Poor | 1949 | 77 | 6,870 |
| LITITZ CREEK | Pennsylvania | Fair | 1949 | 77 | 10,017 |
| CHICKIES CREEK | Pennsylvania | Fair | 1949 | 77 | 51,789 |
| NORFOLK SOUTHERN | Pennsylvania | Fair | 1949 | 77 | 69,254 |
| MCCREARY RUN | Pennsylvania | Poor | 1949 | 77 | 342 |
| SHEARERS CREEK | Pennsylvania | Fair | 1949 | 77 | 24,971 |
| LR36002 SR1037 | Pennsylvania | Fair | 1949 | 77 | 24,971 |
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 7,531 |
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 9,664 |
| FURNACE RUN | Pennsylvania | Fair | 1949 | 77 | 24,971 |
| SEGLOCH RUN | Pennsylvania | Good | 1949 | 77 | 24,971 |
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 200 |
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 200 |
| T-648 | Pennsylvania | Fair | 1949 | 77 | 24,971 |
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 200 |
| PA TPK (I-76) | Pennsylvania | Fair | 1949 | 77 | 200 |
About Historic Bridge Data
Bridges built before 1951 are classified as historic in this database. Many were designed to 1940s standards with lower load limits and narrower lanes. While FHWA requires regular inspections of all bridges regardless of age, older structures often require more frequent monitoring and rehabilitation investment.