Historic Bridges in Washington

1,188 bridges built before 1951 in Washington still in service today.

Bridges Built Before 1951

The United States has 1,188 bridges in Washington 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
HIGHLINE CANAL Washington Good 1932 94 979
HIGHLINE CANAL Washington Good 1932 94 95
LAGOON Washington Fair 1933 93 10
STILLAGUAMISH RIVER Washington Fair 1933 93 45,626
METHOW RIVER Washington Fair 1933 93 1,847
S FK SKYKOMISH RIVER Washington Poor 1933 93 6,408
N 46TH ST Washington Fair 1933 93 21,386
TERRAIN Washington Good 1933 93 11,814
N 50TH ST Washington Fair 1933 93 37,273
WAREHOUSE YARD Washington Poor 1933 93 2,442
PATIT CREEK Washington Fair 1933 93 2,218
PROCTOR CREEK Washington Fair 1933 93 6,993
NO NAME CREEK Washington Poor 1933 93 6,701
ANDERSON CREEK Washington Fair 1933 93 6,701
NINE MILE CR & RR Washington Poor 1933 93 8,140
KLICKITAT RIVER Washington Fair 1933 93 4,529
BONAPARTE CREEK Washington Fair 1933 93 1,755
DRY GULCH Washington Good 1933 93 5,738
DRIVEWAY Washington Good 1933 93 5,653
SLATE CREEK Washington Fair 1933 93 146
CORBETT DRAW Washington Fair 1933 93 1,210
TEN MILE CR Washington Good 1933 93 887
DRY RELIEF Washington Fair 1933 93 38
CALIFORNIA CR Washington Fair 1933 93 5,920
LACAMAS CREEK Washington Good 1933 93 7,195
TEN MILE CR Washington Good 1933 93 961
ACCESS RD CREEK OLD RR Washington Poor 1933 93 7,694
WENATCHEE RIVER & BNSF Washington Fair 1933 93 20,059
PILCHUCK CREEK Washington Poor 1933 93 428
CRAB CREEK Washington Fair 1933 93 17
ARGO RR YARD Washington Poor 1933 93 28,000
SALTWATER STATE PARK Washington Fair 1934 92 3,507
FOSSIL CREEK Washington Poor 1934 92 1,283
DUCKABUSH SLOUGH Washington Fair 1934 92 2,967
DUCKABUSH RIVER Washington Fair 1934 92 2,967
BNSF RR Washington Poor 1934 92 28,316
LOST CREEK Washington Fair 1934 92 1,093
CRAB CREEK Washington Good 1934 92 1,893
PACIFIC P L TAILRACE Washington Good 1934 92 5,794
GREENHEAD SLOUGH Washington Poor 1934 92 1,911
TEAL SLOUGH Washington Poor 1934 92 1,911
S FK PALOUSE RIVER Washington Fair 1934 92 9,648
S FK PALOUSE RIVER Washington Fair 1934 92 9,381
HULL CREEK Washington Poor 1934 92 1,152
SP S RY Washington Good 1934 92 3,783
WEST FORK HOQUIAM RIVER Washington Fair 1934 92 2,119
ROZA CANAL Washington Good 1934 92 510
SAMISH RIVER Washington Fair 1934 92 3,113
S.F. STILLAGUAMISH RIVER Washington Fair 1934 92 6,285
SILVER CREEK Washington Fair 1934 92 1,687

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.