Historic Bridges in Maryland
968 bridges built before 1951 in Maryland still in service today.
Bridges Built Before 1951
The United States has 968 bridges in Maryland 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 |
|---|---|---|---|---|---|
| WESTERN RUN | Maryland | Fair | 1917 | 109 | 23,992 |
| LOVE RUN | Maryland | Fair | 1917 | 109 | 199 |
| KELLOGG BRANCH | Maryland | Fair | 1917 | 109 | 3,193 |
| NORTH STIRRUP RUN | Maryland | Fair | 1917 | 109 | 3,572 |
| NORTH BR OF ROCK CREEK | Maryland | Fair | 1917 | 109 | 16,981 |
| OWENS CREEK | Maryland | Good | 1917 | 109 | 350 |
| SOUTH BRANCH CASSELMAN R | Maryland | Fair | 1917 | 109 | 207 |
| MONOCACY RIVER | Maryland | Fair | 1918 | 108 | 36 |
| LITTLE TONOLOWAY CREEK | Maryland | Fair | 1918 | 108 | 507 |
| BURNT MILL BRANCH | Maryland | Fair | 1919 | 107 | 2,382 |
| ALLOWAY CREEK | Maryland | Fair | 1919 | 107 | 1,911 |
| GRAVELLY BRANCH | Maryland | Fair | 1919 | 107 | 2,025 |
| BUFFALO RUN | Maryland | Poor | 1919 | 107 | 122 |
| LITTLE MONOCACY RIVER | Maryland | Fair | 1919 | 107 | 345 |
| MILL CREEK | Maryland | Fair | 1920 | 106 | 3,682 |
| LITTLE CATOCTIN CREEK | Maryland | Fair | 1920 | 106 | 3,046 |
| SHIPYARD CREEK | Maryland | Fair | 1920 | 106 | 4,590 |
| NORTHWEST BRANCH | Maryland | Fair | 1920 | 106 | 67,927 |
| SLIGO CREEK | Maryland | Fair | 1920 | 106 | 19,392 |
| RED LION BRANCH | Maryland | Fair | 1920 | 106 | 2,391 |
| POCOMOKE RIVER | Maryland | Fair | 1920 | 106 | 3,062 |
| WEST BRANCH HERBERT RUN | Maryland | Fair | 1920 | 106 | 3,710 |
| JONES FALLS | Maryland | Fair | 1920 | 106 | 3,531 |
| TRIBUTARY TO OREGON BRAN | Maryland | Fair | 1920 | 106 | 16,772 |
| GRANITE BRANCH | Maryland | Fair | 1920 | 106 | 239 |
| SLADE RUN | Maryland | Fair | 1920 | 106 | 315 |
| TRIBUTARY TO SLADE RUN | Maryland | Fair | 1920 | 106 | 325 |
| MCGILL RUN | Maryland | Fair | 1920 | 106 | 510 |
| BENS RUN | Maryland | Fair | 1920 | 106 | 4,059 |
| TRIBUTARY TO PATAPSCO RI | Maryland | Fair | 1920 | 106 | 1,466 |
| TRIBUTARY TO BRICE RUN | Maryland | Fair | 1920 | 106 | 2,432 |
| LITTLE DEER CREEK | Maryland | Poor | 1920 | 106 | 734 |
| TRIBUTARY TO GUNPOWDER F | Maryland | Good | 1920 | 106 | 714 |
| BUFFALO CREEK | Maryland | Good | 1920 | 106 | 408 |
| NELSON BRANCH | Maryland | Fair | 1920 | 106 | 135 |
| DULANEY BRANCH | Maryland | Fair | 1920 | 106 | 1,195 |
| ROLAND RUN BRANCH | Maryland | Fair | 1920 | 106 | 1,194 |
| TRIBUTARY TO GUNPOWDER F | Maryland | Fair | 1920 | 106 | 7,580 |
| WATERSPOUT RUN | Maryland | Poor | 1920 | 106 | 7,735 |
| TRIBUTARY TO PINEY CREEK | Maryland | Fair | 1920 | 106 | 2,600 |
| TRIBUTARY TO LITTLE GUNP | Maryland | Good | 1920 | 106 | 603 |
| COMPASS RUN | Maryland | Fair | 1920 | 106 | 1,755 |
| I-83 AND AMTRAK | Maryland | Fair | 1920 | 106 | 4,644 |
| TRIB. TO PATAPSCO RIVER | Maryland | Fair | 1920 | 106 | 3,951 |
| AMTRAK RAILROAD | Maryland | Fair | 1920 | 106 | 3,077 |
| STONEY RUN | Maryland | Fair | 1920 | 106 | 2,220 |
| DITCHLEY PRONG | Maryland | Fair | 1920 | 106 | 55 |
| HOLLOW CREEK | Maryland | Fair | 1920 | 106 | 3,394 |
| CATOCTIN CREEK | Maryland | Fair | 1920 | 106 | 133 |
| FISHING CREEK | Maryland | Good | 1920 | 106 | 466 |
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.