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 |
|---|---|---|---|---|---|
| SLOUGH | Washington | Good | 1945 | 81 | 10,445 |
| SLOUGH | Washington | Good | 1945 | 81 | 10,445 |
| DRAINAGE CHANNEL | Washington | Good | 1945 | 81 | 2,967 |
| OVERFLOW CHANNEL | Washington | Good | 1945 | 81 | 3,728 |
| JOHNSON CR | Washington | Good | 1945 | 81 | 798 |
| KUSSHI CR | Washington | Poor | 1945 | 81 | 4,013 |
| GALENA CREEK | Washington | Good | 1945 | 81 | 636 |
| RAZORHONE CREEK | Washington | Good | 1945 | 81 | 623 |
| JACKMAN CREEK | Washington | Good | 1945 | 81 | 2,998 |
| OLEQUA CR | Washington | Fair | 1945 | 81 | 2,472 |
| SR 166 | Washington | Fair | 1945 | 81 | 5,187 |
| NISQUALLY R OVERFLOW | Washington | Good | 1945 | 81 | 2,872 |
| H W CHANNEL METHOW R | Washington | Good | 1945 | 81 | 4,775 |
| BNRR | Washington | Fair | 1945 | 81 | 32,504 |
| G.W.R.D. IRRIGATION CANA | Washington | Fair | 1945 | 81 | 543 |
| ROCK CREEK | Washington | Fair | 1945 | 81 | 43 |
| CLOQUALLUM CREEK | Washington | Good | 1945 | 81 | 150 |
| HUTCHINSON CR | Washington | Fair | 1945 | 81 | 389 |
| BARNES CREEK | Washington | Fair | 1945 | 81 | 50 |
| WEST CANAL | Washington | Good | 1946 | 80 | 5 |
| WEST CANAL | Washington | Good | 1946 | 80 | 5 |
| WEST CANAL | Washington | Good | 1946 | 80 | 5 |
| BAGLEY CREEK | Washington | Poor | 1946 | 80 | 636 |
| RAZORHONE CREEK | Washington | Good | 1946 | 80 | 636 |
| GALENA CREEK | Washington | Fair | 1946 | 80 | 623 |
| CINEBAR CREEK | Washington | Good | 1946 | 80 | 1,200 |
| BAUER COULEE | Washington | Poor | 1946 | 80 | 301 |
| TACOMA CR | Washington | Poor | 1946 | 80 | 1,202 |
| CEDAR CREEK | Washington | Fair | 1946 | 80 | 1,960 |
| SMITH CREEK | Washington | Good | 1946 | 80 | 3,728 |
| H W CHANNEL METHOW R | Washington | Good | 1946 | 80 | 4,775 |
| DRY WASH | Washington | Fair | 1946 | 80 | 2,250 |
| DRAIN | Washington | Fair | 1946 | 80 | 2,250 |
| N FK CLEAR CREEK | Washington | Good | 1946 | 80 | 1,916 |
| LAKE CREEK | Washington | Fair | 1946 | 80 | 3,805 |
| COTTONWOOD CREEK | Washington | Good | 1946 | 80 | 705 |
| ROCK CREEK | Washington | Poor | 1946 | 80 | 269 |
| IMBLER CREEK | Washington | Poor | 1946 | 80 | 269 |
| DRAINAGE CHANNEL | Washington | Good | 1946 | 80 | 9,478 |
| DEER CREEK | Washington | Good | 1946 | 80 | 13,456 |
| CHERRY CREEK | Washington | Poor | 1946 | 80 | 10,445 |
| COAL CREEK | Washington | Fair | 1946 | 80 | 5,312 |
| IMBLER CREEK | Washington | Fair | 1946 | 80 | 40 |
| TEN MILE CR | Washington | Fair | 1946 | 80 | 68 |
| WILKESON CREEK | Washington | Fair | 1946 | 80 | 550 |
| TACOMA EASTERN RAILROAD | Washington | Fair | 1946 | 80 | 2,900 |
| TACOMA RAIL MNT. DIV. | Washington | Good | 1946 | 80 | 2,725 |
| SMITH CREEK OVERFLOW | Washington | Fair | 1946 | 80 | 1,112 |
| CHAMBERS CREEK | Washington | Fair | 1946 | 80 | 7,275 |
| SAAR CR | Washington | Fair | 1946 | 80 | 206 |
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.