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 |
|---|---|---|---|---|---|
| BRANCH LACAMAS CR. | Washington | Good | 1926 | 100 | 985 |
| LACAMAS CR. | Washington | Good | 1926 | 100 | 985 |
| LACAMAS CR. | Washington | Good | 1926 | 100 | 936 |
| DRY HOLLOW | Washington | Poor | 1926 | 100 | 24 |
| NEWAUKUM OVERFLOW | Washington | Fair | 1926 | 100 | 3,427 |
| DRY CREEK | Washington | Fair | 1926 | 100 | 9,304 |
| BURNS CREEK | Washington | Fair | 1926 | 100 | 1,847 |
| LAUSSIER CR. | Washington | Fair | 1926 | 100 | 932 |
| GARRISON CR | Washington | Fair | 1926 | 100 | 2,125 |
| PARADISE RIVER | Washington | Fair | 1926 | 100 | 1,800 |
| EDITH CREEK | Washington | Fair | 1926 | 100 | 500 |
| PARADISE RIVER | Washington | Fair | 1926 | 100 | 500 |
| SAN POIL RIVER | Washington | Fair | 1927 | 99 | 406 |
| SNOHOMISH RIVER | Washington | Poor | 1927 | 99 | 16,286 |
| UNION SL | Washington | Poor | 1927 | 99 | 16,439 |
| STEAMBOAT SLOUGH | Washington | Poor | 1927 | 99 | 16,592 |
| CHINOOK R | Washington | Fair | 1927 | 99 | 7,256 |
| HYLEBOS CREEK | Washington | Fair | 1927 | 99 | 23,907 |
| SULLIVAN CREEK | Washington | Poor | 1927 | 99 | 949 |
| INDIAN CR | Washington | Fair | 1927 | 99 | 3,200 |
| INDIAN CREEK | Washington | Poor | 1927 | 99 | 3,925 |
| SNAKE RIVER | Washington | Poor | 1927 | 99 | 485 |
| S FK SNOQUALMIE RIVER | Washington | Fair | 1927 | 99 | 50 |
| STEILACOOM LAKE | Washington | Poor | 1927 | 99 | 4,905 |
| NEWAUKUM CREEK | Washington | Fair | 1927 | 99 | 3,694 |
| UNION PACIFIC RAILROAD | Washington | Fair | 1927 | 99 | 20 |
| NEWAUKUM CREEK | Washington | Fair | 1927 | 99 | 520 |
| COWICHE CREEK N. FORK | Washington | Good | 1927 | 99 | 1,100 |
| CLARKS CREEK | Washington | Good | 1927 | 99 | 4,850 |
| SOOS CREEK | Washington | Fair | 1927 | 99 | 8,000 |
| CON-NA-WAI CREEK | Washington | Fair | 1927 | 99 | 30 |
| STILLWATER CREEK | Washington | Fair | 1927 | 99 | 78 |
| DRY RELIEF | Washington | Fair | 1927 | 99 | 21 |
| RAVINE FAIRMOUNT AVE | Washington | Fair | 1927 | 99 | 31,000 |
| LATAH CREEK | Washington | Good | 1927 | 99 | 82 |
| PUGET GULCH N32 TO N 33S | Washington | Fair | 1927 | 99 | 8,088 |
| CHELAN RIVER | Washington | Fair | 1927 | 99 | 3,024 |
| SKOOKUMCHUCK RIVER | Washington | Poor | 1928 | 98 | 8,908 |
| HALL CREEK | Washington | Good | 1928 | 98 | 2,655 |
| HOQUIAM RIVER | Washington | Poor | 1928 | 98 | 12,765 |
| COAL CREEK | Washington | Fair | 1928 | 98 | 18,069 |
| HYAK CREEK | Washington | Fair | 1928 | 98 | 823 |
| ROCK CREEK | Washington | Fair | 1928 | 98 | 1,600 |
| WOODARD CREEK | Washington | Fair | 1928 | 98 | 4,630 |
| DAKOTA CR | Washington | Fair | 1928 | 98 | 1,149 |
| NEWAUKUM CREEK | Washington | Good | 1928 | 98 | 1,750 |
| NEWAUKUM CREEK | Washington | Fair | 1928 | 98 | 4,723 |
| OLEQUA CREEK | Washington | Fair | 1928 | 98 | 1,662 |
| RAILROAD | Washington | Poor | 1928 | 98 | 13,700 |
| ARGO RR Yard | Washington | Fair | 1928 | 98 | 17,500 |
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.