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 |
|---|---|---|---|---|---|
| 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.