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 |
|---|---|---|---|---|---|
| BNSF & DESCHUTES R | Oregon | Fair | 1929 | 97 | 624 |
| WILLAMETTE RIVER | Oregon | Fair | 1929 | 97 | 11,450 |
| Agency Creek | Oregon | Fair | 1929 | 97 | 1,934 |
| Skipanon River | Oregon | Poor | 1929 | 97 | 6,271 |
| Indian Creek | Oregon | Fair | 1929 | 97 | 429 |
| ALDER CR (OLD US 30 | Oregon | Good | 1929 | 97 | 426 |
| CALLOWAY CREEK | Oregon | Fair | 1929 | 97 | 7,533 |
| East Fork Nehalem River | Oregon | Fair | 1929 | 97 | 1,371 |
| TUALATIN RIVER | Oregon | Fair | 1929 | 97 | 14,983 |
| Big Creek | Oregon | Fair | 1929 | 97 | 6,724 |
| SALMON RIVER | Oregon | Fair | 1929 | 97 | 1,493 |
| MARYS RIVER | Oregon | Fair | 1929 | 97 | 84 |
| HOLDEN CREEK | Oregon | Fair | 1929 | 97 | 5,367 |
| TAHKENITCH CREEK | Oregon | Good | 1929 | 97 | 4,305 |
| Columbia River | Oregon | Fair | 1929 | 97 | 21,169 |
| B-9 OVER UPRR | Oregon | Fair | 1929 | 97 | 10,762 |
| Columbia Blvd & UPRR | Oregon | Fair | 1929 | 97 | 12,202 |
| LAKEWOOD BAY | Oregon | Good | 1929 | 97 | 2,952 |
| BRIDGE CREEK | Oregon | Fair | 1929 | 97 | 509 |
| Shelton Ditch | Oregon | Fair | 1929 | 97 | 17,817 |
| MCKENZIE RIVER | Oregon | Fair | 1929 | 97 | 266 |
| B-6 X UNION PACIFIC R R | Oregon | Fair | 1929 | 97 | 8,813 |
| MILL CREEK | Oregon | Fair | 1929 | 97 | 4,037 |
| MILL CREEK | Oregon | Fair | 1929 | 97 | 4,484 |
| MILL CREEK | Oregon | Fair | 1929 | 97 | 22,876 |
| MILL CREEK | Oregon | Fair | 1929 | 97 | 2,186 |
| MILL CREEK | Oregon | Fair | 1929 | 97 | 40,878 |
| MILL CREEK | Oregon | Fair | 1929 | 97 | 40,878 |
| PRINGLE CREEK/SHELTON | Oregon | Fair | 1929 | 97 | 4,371 |
| PRINGLE CREEK | Oregon | Fair | 1929 | 97 | 15,114 |
| SILVER CREEK | Oregon | Fair | 1929 | 97 | 3,310 |
| OSWEGO CREEK | Oregon | Fair | 1930 | 96 | 8,805 |
| Siltcoos River | Oregon | Fair | 1930 | 96 | 4,843 |
| ROGUE RIVER (WEDDERBURN) | Oregon | Fair | 1930 | 96 | 7,286 |
| Slick Rock Creek | Oregon | Fair | 1930 | 96 | 8,356 |
| Neawanna Creek | Oregon | Fair | 1930 | 96 | 16,489 |
| GATE CREEK | Oregon | Fair | 1930 | 96 | 3,712 |
| USRS CANAL | Oregon | Fair | 1930 | 96 | 20,461 |
| Private Road | Oregon | Fair | 1930 | 96 | 16,193 |
| ROCK CREEK | Oregon | Fair | 1930 | 96 | 619 |
| CAMAS SWALE | Oregon | Fair | 1930 | 96 | 4,181 |
| Necanicum River | Oregon | Fair | 1930 | 96 | 14,464 |
| Sutton Creek | Oregon | Fair | 1930 | 96 | 4,351 |
| MILL CREEK | Oregon | Fair | 1930 | 96 | 4,699 |
| MILL CREEK | Oregon | Fair | 1930 | 96 | 4,699 |
| MILL CREEK | Oregon | Fair | 1930 | 96 | 4,699 |
| MILL CREEK | Oregon | Fair | 1930 | 96 | 4,699 |
| Rock Creek | Oregon | Poor | 1930 | 96 | 4,450 |
| Dobbin Creek | Oregon | Fair | 1930 | 96 | 1,324 |
| Wolf Creek | Oregon | Fair | 1930 | 96 | 1,324 |
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.