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 |
|---|---|---|---|---|---|
| DRY CREEK | Washington | Fair | 1921 | 105 | 429 |
| SPRING VALLEY BRANCH | Washington | Good | 1921 | 105 | 429 |
| COLVILLE RIVER | Washington | Fair | 1921 | 105 | 8,606 |
| LACAMAS CREEK | Washington | Good | 1921 | 105 | 10,107 |
| MILL CREEK | Washington | Fair | 1921 | 105 | 15,354 |
| MILL CREEK | Washington | Fair | 1921 | 105 | 9,066 |
| CARBON RIVER | Washington | Poor | 1921 | 105 | 270 |
| PLEASANT VALLEY CREEK | Washington | Fair | 1921 | 105 | 60 |
| ENTIAT RIVER | Washington | Good | 1921 | 105 | 5,957 |
| MIDDLE FORK WILDCAT CREE | Washington | Poor | 1921 | 105 | 1,325 |
| WEST FORK WILDCAT CREEK | Washington | Fair | 1921 | 105 | 2,267 |
| BRANCH SILVER CREEK | Washington | Fair | 1921 | 105 | 2 |
| CLOQUALLUM CREEK | Washington | Fair | 1921 | 105 | 1,863 |
| WILDCAT CREEK | Washington | Fair | 1921 | 105 | 1,863 |
| WILDCAT CREEK | Washington | Fair | 1921 | 105 | 1,863 |
| SNOQUALMIE RIVER | Washington | Poor | 1921 | 105 | 2,458 |
| Cascade Creek | Washington | Fair | 1921 | 105 | 1,607 |
| ROCK CREEK | Washington | Fair | 1921 | 105 | 1,907 |
| COPPER CR | Washington | Fair | 1922 | 104 | 2,249 |
| SILVER CREEK | Washington | Fair | 1922 | 104 | 1,454 |
| OHOP SLOUGH | Washington | Fair | 1922 | 104 | 2,780 |
| OHOP SLOUGH | Washington | Fair | 1922 | 104 | 2,780 |
| JOE LEARY SLOUGH | Washington | Fair | 1922 | 104 | 4,929 |
| ST PARKS TRAIL (PLUVIUS) | Washington | Fair | 1922 | 104 | 1,600 |
| SLOUGH | Washington | Good | 1922 | 104 | 30,762 |
| MILL CREEK | Washington | Good | 1922 | 104 | 30,762 |
| BURLINGTON NORTHERN RR | Washington | Fair | 1922 | 104 | 5,301 |
| OWL CREEK | Washington | Poor | 1922 | 104 | 6,500 |
| PPL PIPELINES | Washington | Poor | 1922 | 104 | 281 |
| PORTAGE CREEK | Washington | Fair | 1922 | 104 | 5,619 |
| CALIFORNIA CR | Washington | Fair | 1922 | 104 | 12 |
| COLVILLE GULCH | Washington | Fair | 1922 | 104 | 100 |
| COTTONWOOD CREEK | Washington | Poor | 1922 | 104 | 50 |
| STALEY CREEK | Washington | Fair | 1922 | 104 | 51 |
| S FK NEWAUKUM RIVER | Washington | Fair | 1922 | 104 | 27 |
| NEWMAN CREEK | Washington | Poor | 1922 | 104 | 2,194 |
| SATSOP OVERFLOW CHANNEL | Washington | Poor | 1922 | 104 | 1,900 |
| MILL CREEK | Washington | Fair | 1922 | 104 | 3,390 |
| WHATCOM CREEK | Washington | Fair | 1922 | 104 | 8,700 |
| S FK PALOUSE RIVER | Washington | Poor | 1923 | 103 | 9,381 |
| OKANOGAN RIVER | Washington | Fair | 1923 | 103 | 5,987 |
| SALMON CREEK | Washington | Good | 1923 | 103 | 1,640 |
| CEDAR CREEK | Washington | Fair | 1923 | 103 | 1,454 |
| GOLDSBOROUGH CREEK | Washington | Fair | 1923 | 103 | 17,285 |
| CALIFORNIA CREEK | Washington | Fair | 1923 | 103 | 411 |
| HILL CREEK | Washington | Fair | 1923 | 103 | 300 |
| SALMON CREEK | Washington | Fair | 1923 | 103 | 1,368 |
| PESHASTIN CR | Washington | Fair | 1923 | 103 | 440 |
| YELLOWHAWK CREEK | Washington | Fair | 1923 | 103 | 750 |
| COULEE CREEK | Washington | Fair | 1923 | 103 | 266 |
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.