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
Three Rivers Oregon Fair 1949 77 4,294
HARBOR DRIVE VIADUCT Oregon Fair 1949 77 11,470
HWY 91 Oregon Fair 1949 77 26,466
DAIRY CREEK Oregon Poor 1949 77 50
S FK COQUILLE RIVER Oregon Fair 1949 77 32
MILL CREEK Oregon Fair 1949 77 115
EAST EAGLE CK Oregon Fair 1949 77 15
FALL CR Oregon Fair 1949 77 90
USRS CANAL Oregon Fair 1949 77 6,228
INTERSTATE AVE Oregon Fair 1949 77 30,388
E FK SNIDER CREEK Oregon Fair 1949 77 2,761
Breitenbush River Oregon Fair 1949 77 4,752
Marys River Oregon Fair 1949 77 23,359
Trask River Oregon Fair 1949 77 8,740
Hillside Oregon Fair 1949 77 8,817
JOHN DAY RIVER Oregon Good 1949 77 123
Tumble Creek Oregon Fair 1949 77 4,241
ROW RIVER Oregon Poor 1949 77 29
AMAZON CHANNEL Oregon Fair 1949 77 15,439
AMAZON CHANNEL Oregon Fair 1949 77 14,171
AMAZON CREEK Oregon Fair 1949 77 25,471
UPRR VIADUCT/4-6-7 AVES Oregon Fair 1949 77 74,362
MILL CREEK Oregon Fair 1949 77 40,878
JOHNSON CREEK Oregon Fair 1949 77 11,561
A LINE CANAL Oregon Fair 1949 77 281
LITTLE CREEK Oregon Fair 1949 77 128
CATHERINE CREEK Oregon Fair 1949 77 117
NORTH FORK JOHN DAY RIVE Oregon Fair 1950 76 10
BLITZEN RIVER Oregon Fair 1950 76 100
Wapato Creek Oregon Poor 1950 76 1
South Fork Ash Creek Oregon Fair 1950 76 9,615
Mt. States Power Canal Oregon Fair 1950 76 10,847
TANNER CREEK Oregon Fair 1950 76 13,724
MOFFETT CREEK Oregon Fair 1950 76 13,724
Marys River Oregon Fair 1950 76 1,447
FRONT AVENUE Oregon Fair 1950 76 1,773
FRONT AVE TO STEEL BR Oregon Fair 1950 76 5,866
GOODMAN CREEK Oregon Fair 1950 76 6,151
WILKINS CREEK Oregon Fair 1950 76 303
WALLOWA R (STATE PARK) Oregon Fair 1950 76 643
COAST FK WILLAMETTE R Oregon Fair 1950 76 12,291
CULTUS CREEK 2 Oregon Fair 1950 76 60
LITTLE DESCHUTES RIVER Oregon Good 1950 76 50
CRESCENT CREEK CULVERTS Oregon Good 1950 76 50
CANYON CREEK #2 Oregon Good 1950 76 75
LINK CREEK Oregon Good 1950 76 25
LAKE BRANCH HOOD RIVER Oregon Good 1950 76 300
ZIGZAG RIVER Oregon Fair 1950 76 25
S FK COQUILLE RIVER Oregon Poor 1950 76 50
NORTH FORK SIUSLAW RIVER Oregon Fair 1950 76 20

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.