Historic Bridges in Oregon
790 bridges built before 1951 in Oregon still in service today.
Bridges Built Before 1951
The United States has 790 bridges in Oregon 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 |
|---|---|---|---|---|---|
| Willamette Rr/UPRR & P&W | Oregon | Fair | 1931 | 95 | 23,537 |
| Private Driveway | Oregon | Fair | 1931 | 95 | 14,210 |
| Canyon Crk | Oregon | Fair | 1932 | 94 | 3,276 |
| WILLAMETTE RIVER | Oregon | Fair | 1932 | 94 | 525 |
| Southworth Creek | Oregon | Good | 1932 | 94 | 1,683 |
| Arnold Creek | Oregon | Fair | 1932 | 94 | 1,476 |
| PARADISE CREEK | Oregon | Fair | 1932 | 94 | 3,554 |
| Sager Creek | Oregon | Good | 1932 | 94 | 273 |
| Farmer River | Oregon | Fair | 1932 | 94 | 4,358 |
| CREEK | Oregon | Poor | 1932 | 94 | 3,445 |
| CREEK | Oregon | Fair | 1932 | 94 | 3,470 |
| CREEK | Oregon | Fair | 1932 | 94 | 3,470 |
| CREEK | Oregon | Fair | 1932 | 94 | 3,894 |
| CREEK | Oregon | Fair | 1932 | 94 | 3,894 |
| CREEK | Oregon | Fair | 1932 | 94 | 3,894 |
| Beaver Creek | Oregon | Fair | 1932 | 94 | 2,642 |
| CASTLE CREEK | Oregon | Fair | 1932 | 94 | 1,001 |
| BYBEE CREEK | Oregon | Fair | 1932 | 94 | 953 |
| Boulder Creek | Oregon | Fair | 1932 | 94 | 3,723 |
| ABERNETHY CREEK | Oregon | Fair | 1932 | 94 | 16,500 |
| DEADWOOD CREEK | Oregon | Fair | 1932 | 94 | 15 |
| COW HOLLOW DRAIN | Oregon | Fair | 1932 | 94 | 481 |
| VALE AGENCY VALLEY DAM | Oregon | Good | 1933 | 93 | 10 |
| Marys River | Oregon | Fair | 1933 | 93 | 11,781 |
| Santiam River | Oregon | Fair | 1933 | 93 | 8,644 |
| CLACKAMAS RIVER | Oregon | Fair | 1933 | 93 | 33,434 |
| UPRR | Oregon | Fair | 1933 | 93 | 9,694 |
| JUNIPER PT HALF VIADUCT | Oregon | Fair | 1933 | 93 | 3,403 |
| KOEPKE SLOUGH | Oregon | Fair | 1933 | 93 | 3,998 |
| Columbia Slough | Oregon | Fair | 1933 | 93 | 11,492 |
| South Fork Silver Creek | Oregon | Fair | 1933 | 93 | 656 |
| Flat Creek | Oregon | Fair | 1933 | 93 | 8,459 |
| Creek | Oregon | Fair | 1933 | 93 | 8,459 |
| Creek | Oregon | Fair | 1933 | 93 | 8,459 |
| GURKIN CANYON CREEK | Oregon | Fair | 1933 | 93 | 2,663 |
| Austins Point | Oregon | Fair | 1933 | 93 | 5,508 |
| POWDER RIVER (BRIDGE ST) | Oregon | Fair | 1933 | 93 | 2,551 |
| ROGUE RIVER | Oregon | Fair | 1933 | 93 | 953 |
| MUIR CREEK | Oregon | Fair | 1933 | 93 | 953 |
| ABERNETHY CREEK | Oregon | Poor | 1933 | 93 | 9,700 |
| CALAPOOYA CREEK | Oregon | Fair | 1933 | 93 | 588 |
| Columbia Slough | Oregon | Fair | 1934 | 92 | 17,168 |
| BURNT RIVER (LIME) | Oregon | Fair | 1934 | 92 | 50 |
| Yaquina Bay | Oregon | Poor | 1934 | 92 | 20,207 |
| Yaquina Bay | Oregon | Good | 1934 | 92 | 20,207 |
| Yaquina Bay | Oregon | Fair | 1934 | 92 | 17,629 |
| East Fork Humbug Creek | Oregon | Fair | 1934 | 92 | 6,234 |
| South Fork Alsea River | Oregon | Fair | 1934 | 92 | 342 |
| Little Nestucca River | Oregon | Poor | 1934 | 92 | 576 |
| DESCHUTES RIVER | Oregon | Fair | 1934 | 92 | 7,631 |
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.