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 |
|---|---|---|---|---|---|
| MOLALLA RIVER | Oregon | Fair | 1930 | 96 | 2,038 |
| EUGENE WATER BOARD CANAL | Oregon | Fair | 1930 | 96 | 7,203 |
| MILTON CREEK | Oregon | Fair | 1930 | 96 | 2,596 |
| DRIFT CREEK | Oregon | Fair | 1930 | 96 | 6,643 |
| LEABURG DAM | Oregon | Fair | 1930 | 96 | 5,367 |
| Bear Creek | Oregon | Fair | 1930 | 96 | 8,904 |
| Salmon River | Oregon | Poor | 1930 | 96 | 7,215 |
| Johnson Creek | Oregon | Fair | 1930 | 96 | 21,862 |
| BEAR CREEK | Oregon | Fair | 1930 | 96 | 35 |
| CLEAR CREEK | Oregon | Fair | 1930 | 96 | 51,600 |
| BEAVER CREEK | Oregon | Good | 1930 | 96 | 562 |
| RHEA CREEK-KEENE BRIDGE | Oregon | Fair | 1930 | 96 | 102 |
| Mill Creek | Oregon | Fair | 1930 | 96 | 31,897 |
| MYRTLE CREEK | Oregon | Fair | 1930 | 96 | 15,228 |
| CATHERINE CREEK | Oregon | Poor | 1930 | 96 | 372 |
| B-1 OVER UP/SPRR | Oregon | Poor | 1930 | 96 | 13,113 |
| B-12 OVER UPRR YARDS | Oregon | Fair | 1930 | 96 | 42,758 |
| B-35 SEMI-VIADUCT | Oregon | Fair | 1930 | 96 | 107 |
| JOHNSON CREEK | Oregon | Poor | 1930 | 96 | 2,901 |
| COPCO PENSTOCKS | Oregon | Fair | 1930 | 96 | 594 |
| COPCO SPILLWAY | Oregon | Fair | 1930 | 96 | 1,345 |
| NORTH FORK ROGUE RIVER | Oregon | Good | 1930 | 96 | 1,060 |
| SANTIAM-ALBANY CANAL | Oregon | Poor | 1930 | 96 | 2,575 |
| SANTIAM-ALBANY CANAL | Oregon | Fair | 1930 | 96 | 1,648 |
| SANTIAM-ALBANY CANAL | Oregon | Fair | 1930 | 96 | 515 |
| SANTIAM-ALBANY CANAL | Oregon | Fair | 1930 | 96 | 1,082 |
| SANTIAM-ALBANY CANAL | Oregon | Fair | 1930 | 96 | 618 |
| PRINGLE CREEK | Oregon | Fair | 1930 | 96 | 8,251 |
| PRINGLE CREEK | Oregon | Fair | 1930 | 96 | 17,251 |
| LITTLE PUDDING RIVER | Oregon | Fair | 1930 | 96 | 2,435 |
| MUD HOLLOW CANYON | Oregon | Fair | 1930 | 96 | 61 |
| EAST BIRCH CREEK | Oregon | Fair | 1930 | 96 | 1,845 |
| ROCK CREEK | Oregon | Fair | 1930 | 96 | 2,209 |
| POTB Railroad | Oregon | Fair | 1931 | 95 | 13,357 |
| Cape Creek | Oregon | Fair | 1931 | 95 | 3,187 |
| China Creek | Oregon | Fair | 1931 | 95 | 3,003 |
| ISTHMUS SLOUGH | Oregon | Fair | 1931 | 95 | 10,903 |
| Cape Perpetua | Oregon | Fair | 1931 | 95 | 2,862 |
| Big Creek | Oregon | Fair | 1931 | 95 | 3,003 |
| Tenmile Creek | Oregon | Fair | 1931 | 95 | 2,922 |
| Cummins Creek | Oregon | Fair | 1931 | 95 | 2,862 |
| ROGUE RIVER | Oregon | Fair | 1931 | 95 | 18,505 |
| Wilson River Slough | Oregon | Fair | 1931 | 95 | 11,881 |
| Wilson River | Oregon | Fair | 1931 | 95 | 11,881 |
| ROCK CREEK (ONION FLAT) | Oregon | Fair | 1931 | 95 | 14,012 |
| LINK RIVER | Oregon | Fair | 1931 | 95 | 19,357 |
| HOOD RIVER TUCKER BR | Oregon | Fair | 1931 | 95 | 1,974 |
| Clear Creek | Oregon | Fair | 1931 | 95 | 3,317 |
| South Yamhill River | Oregon | Fair | 1931 | 95 | 14,550 |
| Lint Creek | Oregon | Fair | 1931 | 95 | 4,466 |
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.