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 |
|---|---|---|---|---|---|
| EB S UMPQUA RV (WINSTON) | Oregon | Fair | 1934 | 92 | 10,802 |
| E FK HOOD RIVER | Oregon | Fair | 1934 | 92 | 1,413 |
| S FK COQUILLE R (POWERS) | Oregon | Fair | 1934 | 92 | 1,386 |
| Kellogg Lake Outlet | Oregon | Fair | 1934 | 92 | 29,069 |
| S. Fork Klaskanine River | Oregon | Fair | 1934 | 92 | 328 |
| N. Fork Klaskanine River | Oregon | Fair | 1934 | 92 | 328 |
| SW NEWBURY ST VIADUCT | Oregon | Fair | 1934 | 92 | 11,777 |
| SW VERMONT ST VIADUCT | Oregon | Fair | 1934 | 92 | 14,057 |
| Beneke Creek | Oregon | Fair | 1934 | 92 | 455 |
| APPLEGATE R (APPLEGATE) | Oregon | Fair | 1934 | 92 | 2,419 |
| UPRR and TriMet | Oregon | Fair | 1934 | 92 | 9,504 |
| YELLOW CREEK | Oregon | Fair | 1934 | 92 | 1,757 |
| Salt Creek | Oregon | Fair | 1934 | 92 | 11,961 |
| Abiqua Creek | Oregon | Poor | 1934 | 92 | 6,347 |
| Abiqua Creek Oflow | Oregon | Fair | 1934 | 92 | 6,347 |
| Gooseneck Creek | Oregon | Fair | 1934 | 92 | 11,358 |
| North Santiam River | Oregon | Fair | 1934 | 92 | 6,500 |
| OSWEGO LAKE | Oregon | Fair | 1934 | 92 | 9,661 |
| OSWEGO CANAL | Oregon | Fair | 1934 | 92 | 4,400 |
| Minto Creek | Oregon | Fair | 1934 | 92 | 3,423 |
| CLATSKANIE RIVER | Oregon | Fair | 1934 | 92 | 6,189 |
| OVERFLOW | Oregon | Poor | 1934 | 92 | 76 |
| OVERFLOW | Oregon | Fair | 1934 | 92 | 46 |
| B-17 ABOVE W BURNSIDE | Oregon | Good | 1934 | 92 | 777 |
| B-18 SEMI-VIADUCT | Oregon | Fair | 1934 | 92 | 709 |
| B-56 OVER JOHNSON CREEK | Oregon | Fair | 1934 | 92 | 674 |
| GASTON SLOUGH | Oregon | Fair | 1934 | 92 | 568 |
| TUALATIN RIVER OVERFLOW | Oregon | Fair | 1934 | 92 | 576 |
| BIG BEND DITCH | Oregon | Good | 1935 | 91 | 914 |
| CBRL | Oregon | Fair | 1935 | 91 | 19,023 |
| GRANDE RONDE R(NE ELGIN) | Oregon | Fair | 1935 | 91 | 1,911 |
| SW MULTNOMAH BLVD | Oregon | Fair | 1935 | 91 | 17,062 |
| S Yamhill River | Oregon | Fair | 1935 | 91 | 5,448 |
| LITTLE SHEEP CREEK | Oregon | Fair | 1935 | 91 | 185 |
| RHEA CREEK | Oregon | Fair | 1935 | 91 | 288 |
| Alder Creek | Oregon | Fair | 1935 | 91 | 1,194 |
| Alder Creek | Oregon | Fair | 1935 | 91 | 1,194 |
| Buck Creek | Oregon | Fair | 1935 | 91 | 1,194 |
| JOHNSON CREEK | Oregon | Fair | 1935 | 91 | 14,100 |
| NORTH UNIT MAIN CANAL | Oregon | Fair | 1935 | 91 | 23,351 |
| ELK CREEK | Oregon | Fair | 1935 | 91 | 579 |
| EAST FORK WILLIAMS CREEK | Oregon | Fair | 1935 | 91 | 289 |
| PINE CREEK | Oregon | Fair | 1935 | 91 | 32 |
| BONNEVILLE DAM | Oregon | Fair | 1935 | 91 | 1,000 |
| BONNEVILLE DAM | Oregon | Fair | 1935 | 91 | 1,000 |
| MILL RACE CANAL | Oregon | Fair | 1936 | 90 | 685 |
| FALL CREEK | Oregon | Fair | 1936 | 90 | 303 |
| Soda Fork | Oregon | Fair | 1936 | 90 | 1,091 |
| CRABTREE CREEK | Oregon | Poor | 1936 | 90 | 258 |
| Siuslaw River | Oregon | Poor | 1936 | 90 | 10,905 |
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.