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
BNSF & DESCHUTES R Oregon Fair 1929 97 624
WILLAMETTE RIVER Oregon Fair 1929 97 11,450
Agency Creek Oregon Fair 1929 97 1,934
Skipanon River Oregon Poor 1929 97 6,271
Indian Creek Oregon Fair 1929 97 429
ALDER CR (OLD US 30 Oregon Good 1929 97 426
CALLOWAY CREEK Oregon Fair 1929 97 7,533
East Fork Nehalem River Oregon Fair 1929 97 1,371
TUALATIN RIVER Oregon Fair 1929 97 14,983
Big Creek Oregon Fair 1929 97 6,724
SALMON RIVER Oregon Fair 1929 97 1,493
MARYS RIVER Oregon Fair 1929 97 84
HOLDEN CREEK Oregon Fair 1929 97 5,367
TAHKENITCH CREEK Oregon Good 1929 97 4,305
Columbia River Oregon Fair 1929 97 21,169
B-9 OVER UPRR Oregon Fair 1929 97 10,762
Columbia Blvd & UPRR Oregon Fair 1929 97 12,202
LAKEWOOD BAY Oregon Good 1929 97 2,952
BRIDGE CREEK Oregon Fair 1929 97 509
Shelton Ditch Oregon Fair 1929 97 17,817
MCKENZIE RIVER Oregon Fair 1929 97 266
B-6 X UNION PACIFIC R R Oregon Fair 1929 97 8,813
MILL CREEK Oregon Fair 1929 97 4,037
MILL CREEK Oregon Fair 1929 97 4,484
MILL CREEK Oregon Fair 1929 97 22,876
MILL CREEK Oregon Fair 1929 97 2,186
MILL CREEK Oregon Fair 1929 97 40,878
MILL CREEK Oregon Fair 1929 97 40,878
PRINGLE CREEK/SHELTON Oregon Fair 1929 97 4,371
PRINGLE CREEK Oregon Fair 1929 97 15,114
SILVER CREEK Oregon Fair 1929 97 3,310
OSWEGO CREEK Oregon Fair 1930 96 8,805
Siltcoos River Oregon Fair 1930 96 4,843
ROGUE RIVER (WEDDERBURN) Oregon Fair 1930 96 7,286
Slick Rock Creek Oregon Fair 1930 96 8,356
Neawanna Creek Oregon Fair 1930 96 16,489
GATE CREEK Oregon Fair 1930 96 3,712
USRS CANAL Oregon Fair 1930 96 20,461
Private Road Oregon Fair 1930 96 16,193
ROCK CREEK Oregon Fair 1930 96 619
CAMAS SWALE Oregon Fair 1930 96 4,181
Necanicum River Oregon Fair 1930 96 14,464
Sutton Creek Oregon Fair 1930 96 4,351
MILL CREEK Oregon Fair 1930 96 4,699
MILL CREEK Oregon Fair 1930 96 4,699
MILL CREEK Oregon Fair 1930 96 4,699
MILL CREEK Oregon Fair 1930 96 4,699
Rock Creek Oregon Poor 1930 96 4,450
Dobbin Creek Oregon Fair 1930 96 1,324
Wolf Creek Oregon Fair 1930 96 1,324

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.