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
NORTH FORK YACHATS RIVER Oregon Fair 1938 88 10
MCKENZIE RIVER Oregon Fair 1938 88 999
MOHAWK RIVER Oregon Fair 1938 88 227
WALLA WALLA RIVER Oregon Fair 1938 88 856
A CANAL Oregon Fair 1938 88 6,056
FALL CREEK Oregon Fair 1938 88 129
BONNEVILLE DAM Oregon Fair 1938 88 83
Wilson River Oregon Poor 1939 87 5,092
North Fork Quartz Creek Oregon Fair 1939 87 6,082
Nehalem River & Hwy 103 Oregon Fair 1939 87 6,082
MULE SHOE CREEK Oregon Good 1939 87 406
CBRL Oregon Fair 1939 87 10,903
INDIAN CREEK Oregon Fair 1939 87 1,893
JOHN DAY R(PRAIRIE CITY) Oregon Fair 1939 87 1,893
DIXIE CRK (PRAIRIE CITY) Oregon Fair 1939 87 2,104
YAMHILL RIVER Oregon Fair 1939 87 6,365
Rooster Rock Culvert Oregon Fair 1939 87 29,509
Necanicum River Oregon Fair 1939 87 6,279
CRABTREE CREEK Oregon Fair 1939 87 371
LOUIS CREEK Oregon Fair 1939 87 600
SOUTH MYRTLE CREEK Oregon Fair 1939 87 260
Marys River Oregon Fair 1939 87 75
B-55 OVER JOHNSON CREEK Oregon Fair 1939 87 1,389
JACKSON CR/SENIC AVE Oregon Fair 1939 87 1,945
JOHNSON CREEK Oregon Good 1939 87 137
A LINE CANAL Oregon Fair 1939 87 146
CENTER CANAL Oregon Fair 1940 86 1
Half Viaduct Oregon Fair 1940 86 5,743
Half Viaduct Oregon Fair 1940 86 5,743
Half Viaduct Oregon Good 1940 86 5,743
Half Viaduct Oregon Fair 1940 86 5,743
Half Viaduct Oregon Good 1940 86 5,743
Half Viaduct Oregon Good 1940 86 5,743
CATHERINE CREEK (PARK) Oregon Fair 1940 86 230
Nehalem River Oregon Fair 1940 86 6,383
CALAPOOIA RIVER Oregon Fair 1940 86 5,562
Willamette River Oregon Fair 1940 86 19,211
City Street & UPRR Oregon Fair 1940 86 18,518
HWY 31 (US 20) Oregon Fair 1940 86 18,518
Devils Lake Fk Wilson R Oregon Fair 1940 86 5,662
Santiam Canal Oregon Fair 1940 86 21,741
Cox Creek Oregon Good 1940 86 29,551
PNWR Oregon Fair 1940 86 35,507
FANNO CREEK Oregon Fair 1940 86 35,507
E FORK BIRCH CREEK Oregon Fair 1940 86 3,218
Alsea River Oregon Fair 1940 86 1,476
Devils Lake Fk Wilson R Oregon Fair 1940 86 4,854
West Fork Dairy Creek Oregon Poor 1940 86 9,574
Partial Viaduct Oregon Fair 1940 86 19,677
CENTRAL OREGON CANAL Oregon Fair 1940 86 12,150

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.