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 |
|---|---|---|---|---|---|
| MCALEER CREEK | Washington | Fair | 1949 | 77 | 600 |
| DUWAMISH RIVER | Washington | Poor | 1949 | 77 | 3,185 |
| SUMAS RIVER | Washington | Fair | 1949 | 77 | 260 |
| WILLAPA RIVER | Washington | Fair | 1949 | 77 | 87 |
| TWISP RIVER | Washington | Poor | 1949 | 77 | 770 |
| DOUGLAS CREEK DRAINAGE | Washington | Fair | 1949 | 77 | 220 |
| W.FORK SALMON CREEK | Washington | Fair | 1949 | 77 | 72 |
| DRY WASH | Washington | Fair | 1949 | 77 | 12 |
| UP&BN RR & MARSHALL CR | Washington | Poor | 1949 | 77 | 2,238 |
| FIFTEEN MILE CREEK | Washington | Fair | 1949 | 77 | 21,368 |
| COWLITZ RIVER | Washington | Fair | 1949 | 77 | 1,109 |
| DEER CREEK | Washington | Fair | 1949 | 77 | 1,621 |
| COAL CREEK | Washington | Fair | 1949 | 77 | 1,324 |
| BERTRAND CR | Washington | Fair | 1949 | 77 | 8,369 |
| CALIFORNIA CR | Washington | Fair | 1949 | 77 | 365 |
| SALMON CREEK | Washington | Fair | 1949 | 77 | 427 |
| SCATTER CREEK | Washington | Fair | 1949 | 77 | 2,813 |
| RAVINE FAIRMOUNT AVE | Washington | Good | 1949 | 77 | 32,000 |
| RR TRACKS ALLEY | Washington | Fair | 1949 | 77 | 19,800 |
| NE CAMPUS PARKWAY | Washington | Fair | 1949 | 77 | 24,500 |
| WHITE RIVER | Washington | Fair | 1949 | 77 | 2,056 |
| THORNTON CR RAVINE | Washington | Good | 1949 | 77 | 9,189 |
| WHATCOM CREEK | Washington | Fair | 1949 | 77 | 2,800 |
| THORNTON CREEK | Washington | Fair | 1949 | 77 | 2,500 |
| POTHOLES CANAL | Washington | Good | 1949 | 77 | 1,601 |
| GOBLE CREEK SOUTH FORK | Washington | Good | 1949 | 77 | 410 |
| WEST CANAL W39.9 | Washington | Fair | 1950 | 76 | 20 |
| EAST LOW CANAL | Washington | Fair | 1950 | 76 | 1 |
| ROCKY COULEE WASTEWAY | Washington | Poor | 1950 | 76 | 10 |
| East Low Canal | Washington | Good | 1950 | 76 | 1 |
| East Low Canal | Washington | Good | 1950 | 76 | 1 |
| East Low Canal | Washington | Good | 1950 | 76 | 1 |
| East Low Canal | Washington | Good | 1950 | 76 | 1 |
| POTHOLES CANAL | Washington | Fair | 1950 | 76 | 15 |
| ROCK CREEK | Washington | Fair | 1950 | 76 | 1 |
| COLUMBIA RIVER | Washington | Fair | 1950 | 76 | 2,645 |
| WEST CANAL | Washington | Good | 1950 | 76 | 8,758 |
| OKANOGAN RIVER | Washington | Fair | 1950 | 76 | 4,504 |
| WEST CANAL | Washington | Good | 1950 | 76 | 8,745 |
| STATE ROUTE 522 | Washington | Poor | 1950 | 76 | 9,464 |
| SPRING GULCH | Washington | Good | 1950 | 76 | 3,369 |
| COLUMBIA R GN RY | Washington | Fair | 1950 | 76 | 26,350 |
| AGATE PASSAGE | Washington | Fair | 1950 | 76 | 21,431 |
| WOODS CREEK | Washington | Fair | 1950 | 76 | 21,661 |
| CEDAR RIVER | Washington | Fair | 1950 | 76 | 22,007 |
| METHOW RIVER | Washington | Fair | 1950 | 76 | 1,847 |
| SINKING CREEK | Washington | Poor | 1950 | 76 | 267 |
| DRY RUN | Washington | Good | 1950 | 76 | 267 |
| GOOSE CR | Washington | Good | 1950 | 76 | 389 |
| SALMON CR | Washington | Fair | 1950 | 76 | 5,294 |
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.