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 |
|---|---|---|---|---|---|
| CHINA CREEK | Washington | Fair | 1946 | 80 | 5 |
| 32ND AVE W RAVINE | Washington | Good | 1946 | 80 | 2,300 |
| MISSOURI FLAT CREEK | Washington | Fair | 1946 | 80 | 14,901 |
| EDGEWATER CREEK | Washington | Poor | 1946 | 80 | 4,883 |
| China Creek | Washington | Good | 1946 | 80 | 10 |
| CRAB CREEK SIPHON NO. 1 | Washington | Good | 1947 | 79 | 10 |
| East Low Canal - Crab Ck | Washington | Good | 1947 | 79 | 5 |
| East Low Canal - Crab Ck | Washington | Good | 1947 | 79 | 5 |
| East Low Canal - Crab Ck | Washington | Good | 1947 | 79 | 5 |
| East Low Canal - Brkn Rk | Washington | Good | 1947 | 79 | 2 |
| East Low Canal - Brkn Rk | Washington | Good | 1947 | 79 | 1 |
| COWEEMAN R | Washington | Good | 1947 | 79 | 1,500 |
| TYE RIVER | Washington | Good | 1947 | 79 | 5,641 |
| TYE RIVER | Washington | Good | 1947 | 79 | 5,590 |
| N FK DEEP CR LOWER X-ING | Washington | Good | 1947 | 79 | 7,178 |
| ABANDONED CASCADE RR | Washington | Poor | 1947 | 79 | 1,512 |
| YAKIMA RIVER | Washington | Fair | 1947 | 79 | 2,678 |
| SLOUGH & CNTY RD | Washington | Fair | 1947 | 79 | 15,105 |
| BIG CREEK | Washington | Fair | 1947 | 79 | 2,503 |
| SOUTH CREEK | Washington | Good | 1947 | 79 | 9,080 |
| WISER LAKE | Washington | Good | 1947 | 79 | 8,009 |
| ROCKY CREEK | Washington | Fair | 1947 | 79 | 2,492 |
| WENATCHEE RIVER | Washington | Fair | 1947 | 79 | 8,705 |
| RATTLESNAKE CREEK | Washington | Good | 1947 | 79 | 3,793 |
| CREEK | Washington | Poor | 1947 | 79 | 2,879 |
| BOULDER CREEK | Washington | Good | 1947 | 79 | 1,139 |
| BIRNIE SLOUGH | Washington | Fair | 1947 | 79 | 906 |
| TILTON RIVER | Washington | Fair | 1947 | 79 | 2,232 |
| DRY RUN | Washington | Good | 1947 | 79 | 488 |
| DRY RUN | Washington | Fair | 1947 | 79 | 472 |
| DRY RUN | Washington | Good | 1947 | 79 | 472 |
| DRY RUN | Washington | Good | 1947 | 79 | 456 |
| WILSON CR | Washington | Fair | 1947 | 79 | 1,181 |
| GHEER CREEK | Washington | Good | 1947 | 79 | 4,376 |
| BN RR | Washington | Fair | 1947 | 79 | 15,105 |
| SAMISH RIVER | Washington | Fair | 1947 | 79 | 3,684 |
| GRAYS RIVER | Washington | Fair | 1947 | 79 | 450 |
| CAVE CREEK | Washington | Fair | 1947 | 79 | 2,042 |
| CHERRY CREEK | Washington | Poor | 1947 | 79 | 1,010 |
| CHERRY CREEK | Washington | Fair | 1947 | 79 | 1,561 |
| TEN MILE CR | Washington | Fair | 1947 | 79 | 841 |
| EAST LOW CANAL | Washington | Fair | 1947 | 79 | 317 |
| SUMAS RIVER | Washington | Fair | 1947 | 79 | 263 |
| SUMAS RIVER | Washington | Fair | 1947 | 79 | 291 |
| MUCK CREEK | Washington | Fair | 1947 | 79 | 4,450 |
| ICICLE CREEK | Washington | Fair | 1947 | 79 | 1,225 |
| MILL CREEK | Washington | Poor | 1947 | 79 | 948 |
| WASHOUGAL RIVER | Washington | Fair | 1947 | 79 | 9,924 |
| SAMMAMISH RIVER | Washington | Good | 1947 | 79 | 9,869 |
| CHINA CREEK | Washington | Fair | 1947 | 79 | 263 |
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.