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 |
|---|---|---|---|---|---|
| MILL CREEK | Pennsylvania | Poor | 1917 | 109 | 500 |
| QUEMAHONING CREEK | Pennsylvania | Poor | 1917 | 109 | 350 |
| LAUREL RUN | Pennsylvania | Fair | 1917 | 109 | 70 |
| TENMILE CREEK | Pennsylvania | Fair | 1917 | 109 | 750 |
| DOGWOOD RUN | Pennsylvania | Fair | 1917 | 109 | 6,455 |
| HARTMAN RUN | Pennsylvania | Fair | 1917 | 109 | 1,185 |
| STONY RUN | Pennsylvania | Fair | 1917 | 109 | 455 |
| BEAVER CREEK | Pennsylvania | Fair | 1917 | 109 | 523 |
| SEPTA(WEST CHESTER BR.) | Pennsylvania | Poor | 1917 | 109 | 8,755 |
| SEPTA (Chestnut Hill W.) | Pennsylvania | Fair | 1917 | 109 | 6,600 |
| CONRAIL B&O RR BELT LINE | Pennsylvania | Fair | 1917 | 109 | 23,000 |
| GLADE RUN | Pennsylvania | Fair | 1918 | 108 | 1,607 |
| COWANSHANNOCK CREEK | Pennsylvania | Fair | 1918 | 108 | 31 |
| NORFOLK SOUTHERN RR | Pennsylvania | Poor | 1918 | 108 | 2,351 |
| LITTLE CONEMAUGH RIVER | Pennsylvania | Good | 1918 | 108 | 5,552 |
| ELK CREEK | Pennsylvania | Fair | 1918 | 108 | 109 |
| FOX RUN | Pennsylvania | Poor | 1918 | 108 | 103 |
| GAP RUN | Pennsylvania | Fair | 1918 | 108 | 6,934 |
| IRISH HOLLOW | Pennsylvania | Fair | 1918 | 108 | 2,074 |
| WEST BR OF BRANDYWINE CR | Pennsylvania | Poor | 1918 | 108 | 833 |
| VALLEY CREEK | Pennsylvania | Poor | 1918 | 108 | 1,492 |
| MUDDY RUN | Pennsylvania | Fair | 1918 | 108 | 170 |
| TWO MILE RUN | Pennsylvania | Good | 1918 | 108 | 203 |
| LITTLE GREEN CREEK | Pennsylvania | Poor | 1918 | 108 | 50 |
| YELLOW BREECHES CREEK | Pennsylvania | Poor | 1918 | 108 | 74 |
| SEPTA (P&W) | Pennsylvania | Fair | 1918 | 108 | 2,451 |
| AMTRAK (MAIN LINE) | Pennsylvania | Poor | 1918 | 108 | — |
| COAL LICK RUN | Pennsylvania | Poor | 1918 | 108 | 3,372 |
| MILL RUN | Pennsylvania | Fair | 1918 | 108 | 100 |
| GEORGES CREEK | Pennsylvania | Poor | 1918 | 108 | 25 |
| FALLING SPRING CREEK | Pennsylvania | Poor | 1918 | 108 | 3,535 |
| BRANCH OF BLOCKHOUSE RUN | Pennsylvania | Fair | 1918 | 108 | 186 |
| TENMILE CREEK | Pennsylvania | Poor | 1918 | 108 | 15 |
| ROSS RUN | Pennsylvania | Fair | 1918 | 108 | 50 |
| UNNAMED STREAM | Pennsylvania | Fair | 1918 | 108 | 100 |
| ECKLES RUN | Pennsylvania | Fair | 1918 | 108 | 1,000 |
| NORFOLK SO. (LINE 0312) | Pennsylvania | Fair | 1918 | 108 | 2,309 |
| POHOPOCO CREEK | Pennsylvania | Fair | 1918 | 108 | 3,709 |
| POHOPOCO CREEK | Pennsylvania | Fair | 1918 | 108 | 3,709 |
| SCHUYKILL RIVER NSRC | Pennsylvania | Fair | 1918 | 108 | 34,456 |
| RIDGE VALLEY CREEK | Pennsylvania | Poor | 1918 | 108 | 44 |
| OVER MILLERS RUN | Pennsylvania | Fair | 1918 | 108 | 317 |
| TRIB SHERMANS CREEK | Pennsylvania | Poor | 1918 | 108 | 705 |
| SHERMAN CREEK | Pennsylvania | Fair | 1918 | 108 | 50 |
| LOYALHANNA CREEK | Pennsylvania | Good | 1918 | 108 | 11,638 |
| BERMUDIAN CREEK | Pennsylvania | Poor | 1918 | 108 | 318 |
| PENNYPACK CREEK | Pennsylvania | Fair | 1918 | 108 | 17,735 |
| CONRAIL;RICHMOND BRANCH | Pennsylvania | Poor | 1918 | 108 | 9,891 |
| AMTRAK MAIN LINE N-S | Pennsylvania | Poor | 1918 | 108 | 9,941 |
| CSX TRANSPORTATION | Pennsylvania | Poor | 1918 | 108 | 100 |
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.