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 |
|---|---|---|---|---|---|
| Drift Creek | Oregon | Fair | 1945 | 81 | 13,759 |
| OCHOCO N MAIN CANAL | Oregon | Fair | 1945 | 81 | 11,484 |
| N UNIT OCHOCO MAIN CANAL | Oregon | Fair | 1945 | 81 | 2,001 |
| UPRR Conn Rt | Oregon | Fair | 1945 | 81 | 14,242 |
| SOUTH SANTIAM RIVER | Oregon | Fair | 1945 | 81 | 158 |
| ALSEA RIVER | Oregon | Poor | 1945 | 81 | 102 |
| N.MIDDLE FORK WILLAMETTE | Oregon | Fair | 1945 | 81 | 38 |
| MAYS CREEK | Oregon | Poor | 1945 | 81 | 152 |
| ANTELOPE CREEK | Oregon | Fair | 1945 | 81 | 86 |
| South Yamhill River | Oregon | Fair | 1946 | 80 | 16,482 |
| Siletz River | Oregon | Fair | 1946 | 80 | 680 |
| Mill Creek | Oregon | Fair | 1946 | 80 | 11,358 |
| PNWR & VADIS | Oregon | Fair | 1946 | 80 | 11,858 |
| Horsetail & Oneonta Ck | Oregon | Fair | 1946 | 80 | 27,375 |
| JACK CREEK | Oregon | Poor | 1946 | 80 | 40 |
| HWY 422 | Oregon | Fair | 1946 | 80 | 6,383 |
| WB HWY 26 | Oregon | Fair | 1946 | 80 | 18,583 |
| Conn 2 Jordan Rd | Oregon | Fair | 1946 | 80 | 15,340 |
| Conn 2 Jordan Rd | Oregon | Good | 1946 | 80 | 15,340 |
| MILL CREEK | Oregon | Fair | 1946 | 80 | 596 |
| Bledsoe Creek | Oregon | Fair | 1946 | 80 | 11,858 |
| ADAMS CREEK | Oregon | Fair | 1946 | 80 | 508 |
| SOUTH UMPQUA RIVER | Oregon | Poor | 1946 | 80 | 4,541 |
| SANTIAM-ALBANY CANAL | Oregon | Fair | 1946 | 80 | 5,665 |
| Wilson River | Oregon | Fair | 1947 | 79 | 4,854 |
| GOOSE CREEK | Oregon | Good | 1947 | 79 | 610 |
| FLAT CREEK | Oregon | Fair | 1947 | 79 | 18,004 |
| ARTHUR STREET | Oregon | Fair | 1947 | 79 | 18,583 |
| ARTHUR ST VIADUCT | Oregon | Poor | 1947 | 79 | 8,710 |
| BUCK HOLLOW CREEK | Oregon | Fair | 1947 | 79 | 115 |
| METOLIUS RIVER | Oregon | Fair | 1947 | 79 | 46 |
| S.FK. COQUILLE RIVER | Oregon | Fair | 1947 | 79 | 50 |
| PEAVINE CREEK | Oregon | Fair | 1947 | 79 | 40 |
| BUTTE CREEK | Oregon | Fair | 1947 | 79 | 11,400 |
| Truax Creek | Oregon | Fair | 1947 | 79 | 66,382 |
| LITTLE BUTTE CREEK | Oregon | Poor | 1947 | 79 | 5,681 |
| TROUT CRK (2ND XING) | Oregon | Fair | 1947 | 79 | 475 |
| TROUT CRK (3RD XING) | Oregon | Fair | 1947 | 79 | 475 |
| IRRIGATION CANAL | Oregon | Fair | 1947 | 79 | 500 |
| Lebanon Ditch | Oregon | Fair | 1947 | 79 | 8,275 |
| Partial Viaduct | Oregon | Fair | 1947 | 79 | 4,907 |
| NORTH UNIT CANAL | Oregon | Fair | 1947 | 79 | 603 |
| FOSTER CREEK | Oregon | Good | 1947 | 79 | 89 |
| CATCHING CREEK | Oregon | Fair | 1947 | 79 | 486 |
| B-58 OVER JOHNSON CREEK | Oregon | Good | 1947 | 79 | 2,752 |
| IRRIGATION CANAL | Oregon | Fair | 1947 | 79 | 144 |
| IRRIGATION CANAL | Oregon | Fair | 1947 | 79 | 35 |
| B-89 OVER JOHNSON CREEK | Oregon | Good | 1947 | 79 | 7,011 |
| SALMON RIVER | Oregon | Fair | 1947 | 79 | 1,929 |
| MIDDLE FK COQUILLE RIVER | Oregon | Fair | 1948 | 78 | 3,518 |
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.