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 |
|---|---|---|---|---|---|
| Three Rivers | Oregon | Fair | 1949 | 77 | 4,294 |
| HARBOR DRIVE VIADUCT | Oregon | Fair | 1949 | 77 | 11,470 |
| HWY 91 | Oregon | Fair | 1949 | 77 | 26,466 |
| DAIRY CREEK | Oregon | Poor | 1949 | 77 | 50 |
| S FK COQUILLE RIVER | Oregon | Fair | 1949 | 77 | 32 |
| MILL CREEK | Oregon | Fair | 1949 | 77 | 115 |
| EAST EAGLE CK | Oregon | Fair | 1949 | 77 | 15 |
| FALL CR | Oregon | Fair | 1949 | 77 | 90 |
| USRS CANAL | Oregon | Fair | 1949 | 77 | 6,228 |
| INTERSTATE AVE | Oregon | Fair | 1949 | 77 | 30,388 |
| E FK SNIDER CREEK | Oregon | Fair | 1949 | 77 | 2,761 |
| Breitenbush River | Oregon | Fair | 1949 | 77 | 4,752 |
| Marys River | Oregon | Fair | 1949 | 77 | 23,359 |
| Trask River | Oregon | Fair | 1949 | 77 | 8,740 |
| Hillside | Oregon | Fair | 1949 | 77 | 8,817 |
| JOHN DAY RIVER | Oregon | Good | 1949 | 77 | 123 |
| Tumble Creek | Oregon | Fair | 1949 | 77 | 4,241 |
| ROW RIVER | Oregon | Poor | 1949 | 77 | 29 |
| AMAZON CHANNEL | Oregon | Fair | 1949 | 77 | 15,439 |
| AMAZON CHANNEL | Oregon | Fair | 1949 | 77 | 14,171 |
| AMAZON CREEK | Oregon | Fair | 1949 | 77 | 25,471 |
| UPRR VIADUCT/4-6-7 AVES | Oregon | Fair | 1949 | 77 | 74,362 |
| MILL CREEK | Oregon | Fair | 1949 | 77 | 40,878 |
| JOHNSON CREEK | Oregon | Fair | 1949 | 77 | 11,561 |
| A LINE CANAL | Oregon | Fair | 1949 | 77 | 281 |
| LITTLE CREEK | Oregon | Fair | 1949 | 77 | 128 |
| CATHERINE CREEK | Oregon | Fair | 1949 | 77 | 117 |
| NORTH FORK JOHN DAY RIVE | Oregon | Fair | 1950 | 76 | 10 |
| BLITZEN RIVER | Oregon | Fair | 1950 | 76 | 100 |
| Wapato Creek | Oregon | Poor | 1950 | 76 | 1 |
| South Fork Ash Creek | Oregon | Fair | 1950 | 76 | 9,615 |
| Mt. States Power Canal | Oregon | Fair | 1950 | 76 | 10,847 |
| TANNER CREEK | Oregon | Fair | 1950 | 76 | 13,724 |
| MOFFETT CREEK | Oregon | Fair | 1950 | 76 | 13,724 |
| Marys River | Oregon | Fair | 1950 | 76 | 1,447 |
| FRONT AVENUE | Oregon | Fair | 1950 | 76 | 1,773 |
| FRONT AVE TO STEEL BR | Oregon | Fair | 1950 | 76 | 5,866 |
| GOODMAN CREEK | Oregon | Fair | 1950 | 76 | 6,151 |
| WILKINS CREEK | Oregon | Fair | 1950 | 76 | 303 |
| WALLOWA R (STATE PARK) | Oregon | Fair | 1950 | 76 | 643 |
| COAST FK WILLAMETTE R | Oregon | Fair | 1950 | 76 | 12,291 |
| CULTUS CREEK 2 | Oregon | Fair | 1950 | 76 | 60 |
| LITTLE DESCHUTES RIVER | Oregon | Good | 1950 | 76 | 50 |
| CRESCENT CREEK CULVERTS | Oregon | Good | 1950 | 76 | 50 |
| CANYON CREEK #2 | Oregon | Good | 1950 | 76 | 75 |
| LINK CREEK | Oregon | Good | 1950 | 76 | 25 |
| LAKE BRANCH HOOD RIVER | Oregon | Good | 1950 | 76 | 300 |
| ZIGZAG RIVER | Oregon | Fair | 1950 | 76 | 25 |
| S FK COQUILLE RIVER | Oregon | Poor | 1950 | 76 | 50 |
| NORTH FORK SIUSLAW RIVER | Oregon | Fair | 1950 | 76 | 20 |
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.