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 |
|---|---|---|---|---|---|
| PRATHER CREEK | Oregon | Good | 1950 | 76 | 50 |
| BIG SHEEP CREEK | Oregon | Poor | 1950 | 76 | 225 |
| N SANTIAM R | Oregon | Fair | 1950 | 76 | 50 |
| WILLAMETTE RIVER | Oregon | Fair | 1950 | 76 | 74,362 |
| FRONT AVE & UPRR | Oregon | Fair | 1950 | 76 | 2,630 |
| B-153 N INTERSTATE AVE | Oregon | Fair | 1950 | 76 | 4,654 |
| Fawcett Creek | Oregon | Good | 1950 | 76 | 6,267 |
| B-152 INTERSTATE SEMI VI | Oregon | Fair | 1950 | 76 | 10,579 |
| Drainage Ditch | Oregon | Fair | 1950 | 76 | 9,395 |
| NE 6th Ave | Oregon | Fair | 1950 | 76 | 16,641 |
| N. Vancouver Way | Oregon | Fair | 1950 | 76 | 17,168 |
| ALBANY-SANTIAM CANAL | Oregon | Fair | 1950 | 76 | 180 |
| SMALLMAN CREEK | Oregon | Poor | 1950 | 76 | 15 |
| OWYHEE CANAL | Oregon | Fair | 1950 | 76 | 358 |
| FIVEMILE CREEK | Oregon | Fair | 1950 | 76 | 40 |
| MILL RACE CANAL | Oregon | Fair | 1950 | 76 | 313 |
| BEAVER CREEK | Oregon | Fair | 1950 | 76 | 137 |
| MOLLALA FOREST RAIL ROAD | Oregon | Fair | 1950 | 76 | 130 |
| JOHNSON CREEK | Oregon | Poor | 1950 | 76 | 9,838 |
| DEER CREEK | Oregon | Fair | 1950 | 76 | 6,466 |
| IRRIGATION CANAL | Oregon | Poor | 1950 | 76 | 44 |
| WEST FORK HORSE CREEK | Oregon | Poor | 1950 | 76 | 191 |
| AMAZON CHANNEL | Oregon | Fair | 1950 | 76 | 11,532 |
| WILLIAMS CREEK | Oregon | Fair | 1950 | 76 | 421 |
| MILL CREEK | Oregon | Fair | 1950 | 76 | 3,738 |
| MILL CREEK | Oregon | Fair | 1950 | 76 | 2,921 |
| PUDDING RIVER | Oregon | Poor | 1950 | 76 | 2,663 |
| EAST FORK DRY CREEK | Oregon | Fair | 1950 | 76 | 121 |
| ROADSIDE DITCH | Oregon | Good | 1950 | 76 | 3,892 |
| ILLINOIS RIVER OVERFLOW | Oregon | Fair | 1950 | 76 | 585 |
| ALTHOUSE CREEK | Oregon | Fair | 1950 | 76 | 964 |
| HUNT DITCH | Oregon | Poor | 1950 | 76 | 63 |
| BIG SHEEP CREEK | Oregon | Poor | 1950 | 76 | 7 |
| LOSTINE RIVER | Oregon | Fair | 1950 | 76 | 452 |
| FARMERS DITCH | Oregon | Poor | 1950 | 76 | 267 |
| THREEMILE CREEK | Oregon | Poor | 1950 | 76 | 598 |
| MOSIER CREEK | Oregon | Poor | 1950 | 76 | 244 |
| MOSIER CREEK | Oregon | Poor | 1950 | 76 | 229 |
| NORTH FORK MOSIER CREEK | Oregon | Fair | 1950 | 76 | 55 |
| ROCK CREEK | Oregon | Fair | 1950 | 76 | 9,915 |
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.