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.
| 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.