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 |
|---|---|---|---|---|---|
| SOUTH CREEK | Washington | Fair | 1934 | 92 | 600 |
| DAKOTA CR | Washington | Fair | 1934 | 92 | 1,033 |
| TEN MILE CR | Washington | Fair | 1934 | 92 | 372 |
| SLOUGH | Washington | Fair | 1934 | 92 | 575 |
| THOMAS CREEK | Washington | Poor | 1934 | 92 | 5,234 |
| BLACK SLOUGH | Washington | Fair | 1934 | 92 | 80 |
| NOOKSACK RIVER | Washington | Fair | 1934 | 92 | 9,332 |
| CARPENTER CREEK | Washington | Fair | 1934 | 92 | 613 |
| SWIFT CR | Washington | Fair | 1934 | 92 | 1,443 |
| FRIDAY CR | Washington | Fair | 1934 | 92 | 851 |
| LATAH CREEK | Washington | Fair | 1934 | 92 | 1,833 |
| STATE PARK ROAD/TRAIL | Washington | Good | 1935 | 91 | 18,797 |
| COLUMBIA RIVER | Washington | Fair | 1935 | 91 | 4,923 |
| ICICLE CREEK | Washington | Fair | 1935 | 91 | 2 |
| DECEPTION PASS | Washington | Fair | 1935 | 91 | 18,797 |
| CANOE PASS | Washington | Fair | 1935 | 91 | 18,797 |
| YAKIMA R | Washington | Fair | 1935 | 91 | 9,615 |
| SLOUGH OF YAKIMA R | Washington | Fair | 1935 | 91 | 9,615 |
| WYNOOCHEE RIVER | Washington | Poor | 1935 | 91 | 21,466 |
| METHOW RIVER | Washington | Fair | 1935 | 91 | 1,578 |
| QUARRY RD (ABANDONED) | Washington | Fair | 1935 | 91 | 983 |
| DUCK CREEK | Washington | Fair | 1935 | 91 | 186 |
| SYLVIA CREEK | Washington | Poor | 1935 | 91 | 3,626 |
| SWAMP CREEK | Washington | Fair | 1935 | 91 | 18,981 |
| SUMAS RIVER | Washington | Fair | 1935 | 91 | 252 |
| TEN MILE CR | Washington | Fair | 1935 | 91 | 4,900 |
| GRANGER CANAL | Washington | Fair | 1935 | 91 | 140 |
| NO NAME CREEK | Washington | Fair | 1935 | 91 | 51 |
| TOUTLE RIVER | Washington | Fair | 1935 | 91 | 509 |
| SWIFT CR | Washington | Fair | 1935 | 91 | 2,340 |
| MILL CREEK | Washington | Fair | 1935 | 91 | 1,526 |
| SLEASMAN SLOUGH | Washington | Fair | 1935 | 91 | 150 |
| ROCK CREEK | Washington | Fair | 1935 | 91 | 17 |
| NO NAME CREEK | Washington | Fair | 1935 | 91 | 135 |
| WEST FORK WOODS CREEK | Washington | Fair | 1935 | 91 | 2,838 |
| SCHMITZ BLVD RAVINE | Washington | Fair | 1935 | 91 | 12,500 |
| CHEWELAH CREEK | Washington | Poor | 1935 | 91 | 300 |
| CHEWELAH CREEK | Washington | Poor | 1935 | 91 | 100 |
| RAILROAD YARDS | Washington | Fair | 1935 | 91 | 26,000 |
| ARGO RR YARD | Washington | Fair | 1935 | 91 | 19,000 |
| RAVINE | Washington | Fair | 1935 | 91 | 125,000 |
| RAVINE | Washington | Fair | 1935 | 91 | 3,000 |
| SQUALICUM CREEK | Washington | Fair | 1935 | 91 | 3,500 |
| CREEK | Washington | Good | 1936 | 90 | 1,719 |
| HENDERSON BAY | Washington | Poor | 1936 | 90 | 23,753 |
| COOK CREEK | Washington | Fair | 1936 | 90 | 1,999 |
| BOULDER CR | Washington | Fair | 1936 | 90 | 1,978 |
| SP S RY | Washington | Fair | 1936 | 90 | 3,619 |
| BNRR | Washington | Poor | 1936 | 90 | 6,180 |
| BIG QUILCENE RIVER | Washington | Poor | 1936 | 90 | 3,525 |
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.