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.

Clear
Bridge State Condition Year Built Age (Years) ADT
MOLALLA RIVER Oregon Fair 1930 96 2,038
EUGENE WATER BOARD CANAL Oregon Fair 1930 96 7,203
MILTON CREEK Oregon Fair 1930 96 2,596
DRIFT CREEK Oregon Fair 1930 96 6,643
LEABURG DAM Oregon Fair 1930 96 5,367
Bear Creek Oregon Fair 1930 96 8,904
Salmon River Oregon Poor 1930 96 7,215
Johnson Creek Oregon Fair 1930 96 21,862
BEAR CREEK Oregon Fair 1930 96 35
CLEAR CREEK Oregon Fair 1930 96 51,600
BEAVER CREEK Oregon Good 1930 96 562
RHEA CREEK-KEENE BRIDGE Oregon Fair 1930 96 102
Mill Creek Oregon Fair 1930 96 31,897
MYRTLE CREEK Oregon Fair 1930 96 15,228
CATHERINE CREEK Oregon Poor 1930 96 372
B-1 OVER UP/SPRR Oregon Poor 1930 96 13,113
B-12 OVER UPRR YARDS Oregon Fair 1930 96 42,758
B-35 SEMI-VIADUCT Oregon Fair 1930 96 107
JOHNSON CREEK Oregon Poor 1930 96 2,901
COPCO PENSTOCKS Oregon Fair 1930 96 594
COPCO SPILLWAY Oregon Fair 1930 96 1,345
NORTH FORK ROGUE RIVER Oregon Good 1930 96 1,060
SANTIAM-ALBANY CANAL Oregon Poor 1930 96 2,575
SANTIAM-ALBANY CANAL Oregon Fair 1930 96 1,648
SANTIAM-ALBANY CANAL Oregon Fair 1930 96 515
SANTIAM-ALBANY CANAL Oregon Fair 1930 96 1,082
SANTIAM-ALBANY CANAL Oregon Fair 1930 96 618
PRINGLE CREEK Oregon Fair 1930 96 8,251
PRINGLE CREEK Oregon Fair 1930 96 17,251
LITTLE PUDDING RIVER Oregon Fair 1930 96 2,435
MUD HOLLOW CANYON Oregon Fair 1930 96 61
EAST BIRCH CREEK Oregon Fair 1930 96 1,845
ROCK CREEK Oregon Fair 1930 96 2,209
POTB Railroad Oregon Fair 1931 95 13,357
Cape Creek Oregon Fair 1931 95 3,187
China Creek Oregon Fair 1931 95 3,003
ISTHMUS SLOUGH Oregon Fair 1931 95 10,903
Cape Perpetua Oregon Fair 1931 95 2,862
Big Creek Oregon Fair 1931 95 3,003
Tenmile Creek Oregon Fair 1931 95 2,922
Cummins Creek Oregon Fair 1931 95 2,862
ROGUE RIVER Oregon Fair 1931 95 18,505
Wilson River Slough Oregon Fair 1931 95 11,881
Wilson River Oregon Fair 1931 95 11,881
ROCK CREEK (ONION FLAT) Oregon Fair 1931 95 14,012
LINK RIVER Oregon Fair 1931 95 19,357
HOOD RIVER TUCKER BR Oregon Fair 1931 95 1,974
Clear Creek Oregon Fair 1931 95 3,317
South Yamhill River Oregon Fair 1931 95 14,550
Lint Creek Oregon Fair 1931 95 4,466

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.