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 |
|---|---|---|---|---|---|
| MILL CREEK | Oregon | Fair | 1948 | 78 | 5,239 |
| DEEP CREEK | Oregon | Fair | 1948 | 78 | 13,468 |
| Deep Creek | Oregon | Fair | 1948 | 78 | 8,140 |
| Trask River | Oregon | Poor | 1948 | 78 | 5,192 |
| METOLIUS RIVER | Oregon | Fair | 1948 | 78 | 75 |
| CLACKAMAS RIVER | Oregon | Fair | 1948 | 78 | 100 |
| CLACKAMAS RIVER | Oregon | Fair | 1948 | 78 | 50 |
| SOUTH UMPQUA RIVER | Oregon | Fair | 1948 | 78 | 50 |
| LAKE CREEK | Oregon | Fair | 1948 | 78 | 60 |
| FALL CR | Oregon | Good | 1948 | 78 | 75 |
| HE HE CR | Oregon | Fair | 1948 | 78 | 75 |
| PORTLAND CR | Oregon | Good | 1948 | 78 | 75 |
| LITTLE WALLA WALLA RIVER | Oregon | Fair | 1948 | 78 | 10,992 |
| SWAMP CREEK | Oregon | Fair | 1948 | 78 | 20,315 |
| WOODFORD CREEK | Oregon | Fair | 1948 | 78 | 20,315 |
| GROVER STREET | Oregon | Fair | 1948 | 78 | 18,583 |
| EB HWY 026 | Oregon | Fair | 1948 | 78 | 5,703 |
| N UNIT CANAL | Oregon | Fair | 1948 | 78 | 9,652 |
| Oneonta Gorge Creek | Oregon | Fair | 1948 | 78 | 901 |
| MCDOWELL CR | Oregon | Fair | 1948 | 78 | 170 |
| NEAL CR | Oregon | Fair | 1948 | 78 | 278 |
| OCHOCO MAIN CANAL | Oregon | Poor | 1948 | 78 | 338 |
| GRAVE CREEK | Oregon | Poor | 1948 | 78 | 75 |
| JIM CREEK | Oregon | Fair | 1948 | 78 | 290 |
| NORTH DEER CREEK | Oregon | Fair | 1948 | 78 | 1,306 |
| B-57 OVER JOHNSON CREEK | Oregon | Fair | 1948 | 78 | 137 |
| IRRIGATION CANAL | Oregon | Good | 1948 | 78 | 59 |
| IRRIGATION CANAL | Oregon | Fair | 1948 | 78 | 262 |
| WILLOW CR | Oregon | Fair | 1948 | 78 | 16 |
| OLALLA CREEK | Oregon | Fair | 1949 | 77 | 6,199 |
| TENMILE CREEK | Oregon | Fair | 1949 | 77 | 4,388 |
| COAST FK WILLAMETTE R | Oregon | Fair | 1949 | 77 | 3,706 |
| COAST FK WILLAMETTE R | Oregon | Fair | 1949 | 77 | 3,646 |
| LONG TOM RIVER 3RD XING | Oregon | Fair | 1949 | 77 | 2,122 |
| LONG TOM RIVER 2ND XING | Oregon | Fair | 1949 | 77 | 2,122 |
| GALES CR | Oregon | Fair | 1949 | 77 | 7,839 |
| Marys River | Oregon | Fair | 1949 | 77 | 4,008 |
| LOWER LOOKINGGLASS CRK | Oregon | Fair | 1949 | 77 | 8,853 |
| Devils Lake Outlet | Oregon | Good | 1949 | 77 | 24,113 |
| CALF CREEK | Oregon | Fair | 1949 | 77 | 1,851 |
| POLE CREEK | Oregon | Fair | 1949 | 77 | 1,772 |
| HWY 100 & UPRR | Oregon | Fair | 1949 | 77 | 13,687 |
| Partial Viaduct | Oregon | Good | 1949 | 77 | 10,062 |
| STEAMBOAT CREEK | Oregon | Fair | 1949 | 77 | 1,149 |
| CBRL | Oregon | Fair | 1949 | 77 | 8,539 |
| BEAVER CREEK | Oregon | Fair | 1949 | 77 | 4,269 |
| Scott Creek | Oregon | Fair | 1949 | 77 | 764 |
| West Fork Drift Creek | Oregon | Fair | 1949 | 77 | 747 |
| South Prairie Creek | Oregon | Good | 1949 | 77 | 8,578 |
| Anderson Creek | Oregon | Good | 1949 | 77 | 8,578 |
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.