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
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.