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
PRATHER CREEK Oregon Good 1950 76 50
BIG SHEEP CREEK Oregon Poor 1950 76 225
N SANTIAM R Oregon Fair 1950 76 50
WILLAMETTE RIVER Oregon Fair 1950 76 74,362
FRONT AVE & UPRR Oregon Fair 1950 76 2,630
B-153 N INTERSTATE AVE Oregon Fair 1950 76 4,654
Fawcett Creek Oregon Good 1950 76 6,267
B-152 INTERSTATE SEMI VI Oregon Fair 1950 76 10,579
Drainage Ditch Oregon Fair 1950 76 9,395
NE 6th Ave Oregon Fair 1950 76 16,641
N. Vancouver Way Oregon Fair 1950 76 17,168
ALBANY-SANTIAM CANAL Oregon Fair 1950 76 180
SMALLMAN CREEK Oregon Poor 1950 76 15
OWYHEE CANAL Oregon Fair 1950 76 358
FIVEMILE CREEK Oregon Fair 1950 76 40
MILL RACE CANAL Oregon Fair 1950 76 313
BEAVER CREEK Oregon Fair 1950 76 137
MOLLALA FOREST RAIL ROAD Oregon Fair 1950 76 130
JOHNSON CREEK Oregon Poor 1950 76 9,838
DEER CREEK Oregon Fair 1950 76 6,466
IRRIGATION CANAL Oregon Poor 1950 76 44
WEST FORK HORSE CREEK Oregon Poor 1950 76 191
AMAZON CHANNEL Oregon Fair 1950 76 11,532
WILLIAMS CREEK Oregon Fair 1950 76 421
MILL CREEK Oregon Fair 1950 76 3,738
MILL CREEK Oregon Fair 1950 76 2,921
PUDDING RIVER Oregon Poor 1950 76 2,663
EAST FORK DRY CREEK Oregon Fair 1950 76 121
ROADSIDE DITCH Oregon Good 1950 76 3,892
ILLINOIS RIVER OVERFLOW Oregon Fair 1950 76 585
ALTHOUSE CREEK Oregon Fair 1950 76 964
HUNT DITCH Oregon Poor 1950 76 63
BIG SHEEP CREEK Oregon Poor 1950 76 7
LOSTINE RIVER Oregon Fair 1950 76 452
FARMERS DITCH Oregon Poor 1950 76 267
THREEMILE CREEK Oregon Poor 1950 76 598
MOSIER CREEK Oregon Poor 1950 76 244
MOSIER CREEK Oregon Poor 1950 76 229
NORTH FORK MOSIER CREEK Oregon Fair 1950 76 55
ROCK CREEK Oregon Fair 1950 76 9,915

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.