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
DAVIS CREEK Washington Fair 1936 90 1,588
MILL CR Washington Good 1936 90 6,477
SLOUGH BR Washington Fair 1936 90 4,571
S FK SNOQUALMIE R Washington Fair 1936 90 11,531
CLEAR CREEK Washington Fair 1936 90 100
COAL CREEK Washington Fair 1936 90 107
OVERFLOW CHANNEL Washington Fair 1936 90 5,226
NOOKSACK RIVER Washington Fair 1936 90 3,900
CRAB CREEK Washington Poor 1936 90 50
LAKE CREEK Washington Fair 1936 90 12
PORTER CREEK Washington Fair 1936 90 162
SINKING CREEK Washington Poor 1936 90 22
PRAIRIE CREEK Washington Fair 1936 90 3,433
WILSON CREEK Washington Good 1936 90 75
DRY CREEK Washington Poor 1936 90 120
PYSHT RIVER Washington Fair 1936 90 1,358
COLUMBIA PLATEAU TRAIL Washington Fair 1936 90 1,212
FLOOD CHANNEL Washington Fair 1936 90 2,661
LIGHT DITCH Washington Fair 1936 90 1,972
ROZA CANAL Washington Good 1936 90 1,370
SMITH CREEK Washington Fair 1936 90 23
VEACH CREEK Washington Fair 1936 90 18
TAMARACK CREEK Washington Fair 1936 90 20
CRAB CREEK Washington Good 1936 90 67
HILINE CANAL Washington Fair 1936 90 1,126
YAKIMA RIVER Washington Fair 1936 90 237
LITTLE VALLEY CREEK Washington Fair 1936 90 243
CRAB CREEK Washington Fair 1936 90 30
MISSION CREEK Washington Fair 1936 90 3,742
COWEN PARK RAVINE Washington Fair 1936 90 13,000
SALZER CREEK Washington Fair 1936 90 8,038
INLAND EMPIRE WAY Washington Fair 1936 90 8,174
DESCHUTES R. & OWRR&N R. Washington Fair 1936 90 14,881
LEWIS STREET Washington Fair 1936 90 332
WHATCOM CREEK Washington Poor 1936 90 3,700
STEMILT CREEK Washington Fair 1936 90 2
ROZA ID MAIN CANAL Washington Fair 1937 89 15
WASTEWAY NO. 2 Washington Good 1937 89 10
KEARNEY CREEK Washington Fair 1937 89 1,714
MILL CREEK Washington Fair 1937 89 1,200
ALDER CREEK Washington Fair 1937 89 1,200
CREEK Washington Fair 1937 89 1,200
GULCH Washington Good 1937 89 3,619
NISQUALLY RIVER Washington Fair 1937 89 62,815
TERRAIN Washington Fair 1937 89 1,338
STREAM Washington Fair 1937 89 6,441
STREAM Washington Fair 1937 89 6,441
STREAM Washington Good 1937 89 6,441
STREAM Washington Fair 1937 89 6,441
STREAM Washington Fair 1937 89 6,441

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.