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
EB S UMPQUA RV (WINSTON) Oregon Fair 1934 92 10,802
E FK HOOD RIVER Oregon Fair 1934 92 1,413
S FK COQUILLE R (POWERS) Oregon Fair 1934 92 1,386
Kellogg Lake Outlet Oregon Fair 1934 92 29,069
S. Fork Klaskanine River Oregon Fair 1934 92 328
N. Fork Klaskanine River Oregon Fair 1934 92 328
SW NEWBURY ST VIADUCT Oregon Fair 1934 92 11,777
SW VERMONT ST VIADUCT Oregon Fair 1934 92 14,057
Beneke Creek Oregon Fair 1934 92 455
APPLEGATE R (APPLEGATE) Oregon Fair 1934 92 2,419
UPRR and TriMet Oregon Fair 1934 92 9,504
YELLOW CREEK Oregon Fair 1934 92 1,757
Salt Creek Oregon Fair 1934 92 11,961
Abiqua Creek Oregon Poor 1934 92 6,347
Abiqua Creek Oflow Oregon Fair 1934 92 6,347
Gooseneck Creek Oregon Fair 1934 92 11,358
North Santiam River Oregon Fair 1934 92 6,500
OSWEGO LAKE Oregon Fair 1934 92 9,661
OSWEGO CANAL Oregon Fair 1934 92 4,400
Minto Creek Oregon Fair 1934 92 3,423
CLATSKANIE RIVER Oregon Fair 1934 92 6,189
OVERFLOW Oregon Poor 1934 92 76
OVERFLOW Oregon Fair 1934 92 46
B-17 ABOVE W BURNSIDE Oregon Good 1934 92 777
B-18 SEMI-VIADUCT Oregon Fair 1934 92 709
B-56 OVER JOHNSON CREEK Oregon Fair 1934 92 674
GASTON SLOUGH Oregon Fair 1934 92 568
TUALATIN RIVER OVERFLOW Oregon Fair 1934 92 576
BIG BEND DITCH Oregon Good 1935 91 914
CBRL Oregon Fair 1935 91 19,023
GRANDE RONDE R(NE ELGIN) Oregon Fair 1935 91 1,911
SW MULTNOMAH BLVD Oregon Fair 1935 91 17,062
S Yamhill River Oregon Fair 1935 91 5,448
LITTLE SHEEP CREEK Oregon Fair 1935 91 185
RHEA CREEK Oregon Fair 1935 91 288
Alder Creek Oregon Fair 1935 91 1,194
Alder Creek Oregon Fair 1935 91 1,194
Buck Creek Oregon Fair 1935 91 1,194
JOHNSON CREEK Oregon Fair 1935 91 14,100
NORTH UNIT MAIN CANAL Oregon Fair 1935 91 23,351
ELK CREEK Oregon Fair 1935 91 579
EAST FORK WILLIAMS CREEK Oregon Fair 1935 91 289
PINE CREEK Oregon Fair 1935 91 32
BONNEVILLE DAM Oregon Fair 1935 91 1,000
BONNEVILLE DAM Oregon Fair 1935 91 1,000
MILL RACE CANAL Oregon Fair 1936 90 685
FALL CREEK Oregon Fair 1936 90 303
Soda Fork Oregon Fair 1936 90 1,091
CRABTREE CREEK Oregon Poor 1936 90 258
Siuslaw River Oregon Poor 1936 90 10,905

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.