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 |
|---|---|---|---|---|---|
| WISSAHICKON CREEK | Pennsylvania | Fair | 1907 | 119 | 18,036 |
| CONRAIL (Abolished) | Pennsylvania | Fair | 1907 | 119 | 6,700 |
| CONRAIL | Pennsylvania | Good | 1907 | 119 | 6,300 |
| Pennypack Creek | Pennsylvania | Poor | 1907 | 119 | 10,000 |
| PINE RUN | Pennsylvania | Good | 1907 | 119 | 431 |
| CONEMAUGH RIVER | Pennsylvania | Poor | 1907 | 119 | 30 |
| PAT AIRPORT BUSWAY | Pennsylvania | Fair | 1908 | 118 | 12,700 |
| SCHENLEY PARK STREAM | Pennsylvania | Fair | 1908 | 118 | 50 |
| SCHENLEY PARK STREAM | Pennsylvania | Fair | 1908 | 118 | 50 |
| MONOCACY CREEK | Pennsylvania | Poor | 1908 | 118 | 1,254 |
| MONOCACY CREEK | Pennsylvania | Fair | 1908 | 118 | 671 |
| BR. OF PERKIOMEN CREEK | Pennsylvania | Poor | 1908 | 118 | 1,255 |
| FURNACE CREEK | Pennsylvania | Poor | 1908 | 118 | 112 |
| CLOVER CREEK | Pennsylvania | Poor | 1908 | 118 | 667 |
| CLOVER CREEK | Pennsylvania | Fair | 1908 | 118 | 218 |
| TOWANDA CREEK | Pennsylvania | Fair | 1908 | 118 | 150 |
| RIDGE VALLEY CREEK | Pennsylvania | Good | 1908 | 118 | 4,451 |
| LITTLE YELLOW CREEK | Pennsylvania | Fair | 1908 | 118 | 200 |
| HALF MOON CREEK | Pennsylvania | Poor | 1908 | 118 | 467 |
| DARBY CREEK | Pennsylvania | Poor | 1908 | 118 | 5,415 |
| PICKERING CREEK | Pennsylvania | Fair | 1908 | 118 | 474 |
| LITTLE CLEARFIELD CREEK | Pennsylvania | Fair | 1908 | 118 | 70 |
| OVER ROARING CREEK | Pennsylvania | Fair | 1908 | 118 | 152 |
| LETORT SPRING CREEK | Pennsylvania | Poor | 1908 | 118 | 22,247 |
| PAXTON CREEK | Pennsylvania | Fair | 1908 | 118 | — |
| CONNELL RUN | Pennsylvania | Fair | 1908 | 118 | 2,994 |
| BROWNS RUN | Pennsylvania | Poor | 1908 | 118 | 30 |
| BROWNS RUN | Pennsylvania | Fair | 1908 | 118 | 30 |
| RATHMEL RUN | Pennsylvania | Fair | 1908 | 118 | 578 |
| MAHANTANGO CREEK | Pennsylvania | Fair | 1908 | 118 | 776 |
| WHITE OAK RUN | Pennsylvania | Poor | 1908 | 118 | 200 |
| OSWAYO CREEK | Pennsylvania | Poor | 1908 | 118 | — |
| PORTAGE CREEK | Pennsylvania | Poor | 1908 | 118 | 25 |
| Mill Creek | Pennsylvania | Poor | 1908 | 118 | 43 |
| HONEY CREEK | Pennsylvania | Fair | 1908 | 118 | 834 |
| SKIPPACK CREEK | Pennsylvania | Fair | 1908 | 118 | 2,965 |
| SKIPPACK CREEK | Pennsylvania | Poor | 1908 | 118 | 26 |
| MILL CREEK | Pennsylvania | Fair | 1908 | 118 | 2,740 |
| ALLEGHENY CREEK | Pennsylvania | Fair | 1908 | 118 | 150 |
| DRAKE RUN | Pennsylvania | Poor | 1908 | 118 | 256 |
| HIGGINS RUN | Pennsylvania | Poor | 1908 | 118 | 477 |
| ROARING RUN | Pennsylvania | Poor | 1908 | 118 | 109 |
| ROARING RUN | Pennsylvania | Fair | 1908 | 118 | 109 |
| GLADDENS RUN | Pennsylvania | Poor | 1908 | 118 | 100 |
| LOWER TWO MILE RUN | Pennsylvania | Poor | 1908 | 118 | 250 |
| RACCOON CREEK | Pennsylvania | Fair | 1908 | 118 | 50 |
| WELTY RUN | Pennsylvania | Poor | 1908 | 118 | 1,033 |
| AMTRAK | Pennsylvania | Fair | 1908 | 118 | 19,989 |
| SEPTA | Pennsylvania | Fair | 1908 | 118 | 10,110 |
| AMTRAK ; CONRAIL | Pennsylvania | Good | 1908 | 118 | 11,500 |
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.