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 | 1950 | 76 | 3,856 |
| PA TPK (I-76) | Pennsylvania | Fair | 1950 | 76 | 2,304 |
| PA TPK (I-76) | Pennsylvania | Fair | 1950 | 76 | 6,088 |
| PA TPK (I-76) | Pennsylvania | Fair | 1950 | 76 | 993 |
| MIDDLE CREEK | Pennsylvania | Poor | 1950 | 76 | 25 |
| DONEGAL CREEK | Pennsylvania | Poor | 1950 | 76 | 700 |
| CONOWINGO CREEK | Pennsylvania | Poor | 1950 | 76 | 155 |
| HAMMER CREEK | Pennsylvania | Fair | 1950 | 76 | 100 |
| LITTLE CHIQUES CRK | Pennsylvania | Fair | 1950 | 76 | 200 |
| TRIB BIG BEAVER CRK | Pennsylvania | Fair | 1950 | 76 | 605 |
| HUBER RUN | Pennsylvania | Fair | 1950 | 76 | 490 |
| LITTLE COCALICO CREEK | Pennsylvania | Poor | 1950 | 76 | 105 |
| COCALICO CREEK | Pennsylvania | Good | 1950 | 76 | 50 |
| COCALICO CREEK | Pennsylvania | Poor | 1950 | 76 | 1,800 |
| CONOY CREEK | Pennsylvania | Fair | 1950 | 76 | 1,030 |
| CONOY CREEK | Pennsylvania | Fair | 1950 | 76 | 1,550 |
| SLIPPERY ROCK CREEK | Pennsylvania | Fair | 1950 | 76 | 12,832 |
| NESHANNOCK CREEK | Pennsylvania | Fair | 1950 | 76 | 5,366 |
| BIG RUN | Pennsylvania | Fair | 1950 | 76 | 7,438 |
| WILLOW BROOK | Pennsylvania | Fair | 1950 | 76 | 7,438 |
| HOTTENBAUGH RUN | Pennsylvania | Good | 1950 | 76 | 50 |
| MAHONING RIVER TRIB | Pennsylvania | Poor | 1950 | 76 | 1,000 |
| CAMP RUN | Pennsylvania | Poor | 1950 | 76 | 100 |
| GINGRICH RUN | Pennsylvania | Fair | 1950 | 76 | 13,780 |
| PA TPK (I-76) | Pennsylvania | Fair | 1950 | 76 | 3,141 |
| LITTLE LEHIGH CREEK | Pennsylvania | Fair | 1950 | 76 | 1,201 |
| LITTLE LEHIGH CREEK | Pennsylvania | Poor | 1950 | 76 | 750 |
| SWITZER CREEK | Pennsylvania | Fair | 1950 | 76 | 100 |
| CATASAUQUA CREEK | Pennsylvania | Poor | 1950 | 76 | 500 |
| CATASAUQUA CREEK | Pennsylvania | Fair | 1950 | 76 | 1,000 |
| SOLOMON CREEK | Pennsylvania | Fair | 1950 | 76 | 3,600 |
| LAKE JEAN OUTLET | Pennsylvania | Good | 1950 | 76 | 600 |
| OVER HAGERMANS RUN | Pennsylvania | Fair | 1950 | 76 | 12,807 |
| OVER MORGAN RUN | Pennsylvania | Fair | 1950 | 76 | 5,026 |
| OVER BIG RUN | Pennsylvania | Good | 1950 | 76 | 3,178 |
| MILL CREEK | Pennsylvania | Poor | 1950 | 76 | 100 |
| PLEASANT STREAM | Pennsylvania | Poor | 1950 | 76 | 108 |
| HALF MILE RUN | Pennsylvania | Poor | 1950 | 76 | 40 |
| S BR KNAPP CREEK | Pennsylvania | Poor | 1950 | 76 | 10 |
| LEWIS RUN | Pennsylvania | Poor | 1950 | 76 | 200 |
| E BR TUNUNGWANT CREEK | Pennsylvania | Fair | 1950 | 76 | 400 |
| BOBBY RUN | Pennsylvania | Good | 1950 | 76 | 7,590 |
| SPRING RUN | Pennsylvania | Fair | 1950 | 76 | 739 |
| STONY RUN | Pennsylvania | Fair | 1950 | 76 | 2,604 |
| FOREST HILLS RUN | Pennsylvania | Good | 1950 | 76 | 896 |
| LONGSHORE CREEK | Pennsylvania | Poor | 1950 | 76 | 974 |
| STONY CREEK | Pennsylvania | Fair | 1950 | 76 | 13,812 |
| BRANCH STONY RUN | Pennsylvania | Fair | 1950 | 76 | 13,812 |
| ABRAMS RUN/CROW CREEK | Pennsylvania | Fair | 1950 | 76 | 52,925 |
| CROTON ROAD | Pennsylvania | Fair | 1950 | 76 | 93,338 |
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.