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 |
|---|---|---|---|---|---|
| Lebanon Ditch | Oregon | Poor | 1921 | 105 | 18,798 |
| Blackhorse Creek | Oregon | Fair | 1921 | 105 | 1,546 |
| INDIAN CREEK | Oregon | Fair | 1921 | 105 | 8,331 |
| REESE CREEK | Oregon | Fair | 1921 | 105 | 8,367 |
| DRY CREEK (GLOVER) | Oregon | Fair | 1921 | 105 | 60 |
| FIVE POINTS CRK | Oregon | Fair | 1921 | 105 | 32 |
| Hinton Creek | Oregon | Fair | 1921 | 105 | 2,909 |
| WILLOW CREEK | Oregon | Fair | 1921 | 105 | 927 |
| Belt Line | Oregon | Fair | 1921 | 105 | 7,781 |
| N Fork Klaskanine River | Oregon | Fair | 1921 | 105 | 453 |
| WOLF CREEK | Oregon | Fair | 1921 | 105 | 201 |
| SUTHERLIN CREEK | Oregon | Fair | 1921 | 105 | 6,589 |
| COOPER CREEK | Oregon | Fair | 1921 | 105 | 6,857 |
| SUTHERLIN CREEK | Oregon | Fair | 1921 | 105 | 3,817 |
| LOST CREEK | Oregon | Fair | 1921 | 105 | 371 |
| DEER CREEK | Oregon | Fair | 1921 | 105 | 393 |
| FURNISH DITCH | Oregon | Good | 1921 | 105 | 281 |
| FURNISH DITCH | Oregon | Fair | 1921 | 105 | 157 |
| FURNISH DITCH | Oregon | Fair | 1921 | 105 | 168 |
| FURNISH DITCH | Oregon | Fair | 1921 | 105 | 135 |
| FURNISH DITCH | Oregon | Fair | 1921 | 105 | 168 |
| TUALATIN RIVER | Oregon | Fair | 1921 | 105 | 576 |
| WILLAMETTE RIVER | Oregon | Fair | 1922 | 104 | 14,550 |
| Ash Swale | Oregon | Fair | 1922 | 104 | 5,468 |
| Ash Swale | Oregon | Fair | 1922 | 104 | 8,637 |
| UPRR | Oregon | Poor | 1922 | 104 | 222 |
| UPRR | Oregon | Fair | 1922 | 104 | 156 |
| Lake Creek | Oregon | Fair | 1922 | 104 | 3,351 |
| LITTLE CREEK (UNION) | Oregon | Fair | 1922 | 104 | 2,496 |
| WEST FORK BIRCH CREEK | Oregon | Good | 1922 | 104 | 604 |
| Clear Creek | Oregon | Fair | 1922 | 104 | 3,496 |
| Big Rack Heap Creek | Oregon | Fair | 1922 | 104 | 492 |
| EIGHTMILE CREEK | Oregon | Fair | 1922 | 104 | 75 |
| EIGHTMILE CREEK | Oregon | Fair | 1922 | 104 | 75 |
| EIGHTMILE CREEK | Oregon | Fair | 1922 | 104 | 75 |
| Pudding R. Relief Chan. | Oregon | Fair | 1922 | 104 | 8,230 |
| Pudding River | Oregon | Fair | 1922 | 104 | 15,402 |
| DEER CREEK | Oregon | Fair | 1922 | 104 | 16 |
| BILGER CREEK | Oregon | Fair | 1922 | 104 | 2,358 |
| SOUTH UMPQUA RIVER | Oregon | Fair | 1922 | 104 | 11,004 |
| B-14 OVER CANYON | Oregon | Fair | 1922 | 104 | 137 |
| COYOTE CREEK | Oregon | Fair | 1922 | 104 | 273 |
| NORTH FORK ASH CREEK | Oregon | Fair | 1922 | 104 | 3,329 |
| FURNISH DITCH | Oregon | Fair | 1922 | 104 | 281 |
| INDIAN CREEK | Oregon | Poor | 1922 | 104 | 27 |
| Yaquina River | Oregon | Fair | 1923 | 103 | 6,611 |
| Dairy Creek | Oregon | Fair | 1923 | 103 | 28,179 |
| HAY CREEK | Oregon | Fair | 1923 | 103 | 2,116 |
| Baskett Slough | Oregon | Fair | 1923 | 103 | 12,985 |
| NORTH UMPQUA RIVER | Oregon | Fair | 1923 | 103 | 7,974 |
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.