Historic Bridges in California
4,414 bridges built before 1951 in California still in service today.
Bridges Built Before 1951
The United States has 4,414 bridges in California 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 |
|---|---|---|---|---|---|
| BRUSH CREEK | California | Good | 1930 | 96 | 1,166 |
| BUD DITCH | California | Fair | 1930 | 96 | 230 |
| CORAL WASH | California | Fair | 1930 | 96 | 230 |
| WIDE WASH | California | Fair | 1930 | 96 | 250 |
| HIGH DITCH | California | Fair | 1930 | 96 | 230 |
| AVON WASH | California | Fair | 1930 | 96 | 235 |
| FONDA DITCH | California | Fair | 1930 | 96 | 230 |
| ANVIA DITCH | California | Fair | 1930 | 96 | 230 |
| KALMIA DITCH | California | Poor | 1930 | 96 | 235 |
| SIBERIA DITCH | California | Fair | 1930 | 96 | 235 |
| ROCAS DITCH | California | Fair | 1930 | 96 | 235 |
| VERADO DITCH | California | Fair | 1930 | 96 | 230 |
| ZANZA DITCH | California | Fair | 1930 | 96 | 235 |
| NOLA DITCH | California | Fair | 1930 | 96 | 235 |
| BANGOR DITCH | California | Fair | 1930 | 96 | 235 |
| TROJAN DITCH | California | Fair | 1930 | 96 | 235 |
| DURANGO DITCH | California | Fair | 1930 | 96 | 235 |
| CINDER DITCH | California | Poor | 1930 | 96 | 235 |
| BAGDAD DITCH | California | Fair | 1930 | 96 | 235 |
| CASHIO DITCH | California | Fair | 1930 | 96 | 235 |
| EL ROVIA DITCH | California | Fair | 1930 | 96 | 235 |
| TRADA DITCH | California | Fair | 1930 | 96 | 230 |
| SCARPA DITCH | California | Fair | 1930 | 96 | 230 |
| ETTRICK DITCH | California | Poor | 1930 | 96 | 230 |
| FLORWOOD DITCH | California | Poor | 1930 | 96 | 230 |
| ENCANTO DITCH | California | Fair | 1930 | 96 | 230 |
| DIAZ DITCH | California | Fair | 1930 | 96 | 230 |
| CHANDA DITCH | California | Fair | 1930 | 96 | 230 |
| BARODA DITCH | California | Fair | 1930 | 96 | 239 |
| BASALT DITCH | California | Fair | 1930 | 96 | 230 |
| CRATER DITCH | California | Fair | 1930 | 96 | 230 |
| BRISTOL DITCH | California | Fair | 1930 | 96 | 230 |
| CERRO DITCH | California | Fair | 1930 | 96 | 790 |
| GORDO DITCH | California | Fair | 1930 | 96 | 790 |
| CERULIA DITCH | California | Fair | 1930 | 96 | 805 |
| LEITH DITCH | California | Fair | 1930 | 96 | 805 |
| TERRA DITCH | California | Fair | 1930 | 96 | 790 |
| SOMBRA DITCH | California | Poor | 1930 | 96 | 806 |
| BEACON DITCH | California | Fair | 1930 | 96 | 805 |
| LARISSA DITCH | California | Fair | 1930 | 96 | 502 |
| ZAGA DITCH | California | Fair | 1930 | 96 | 502 |
| ALSA DITCH | California | Fair | 1930 | 96 | 502 |
| LAMEGO DITCH | California | Fair | 1930 | 96 | 502 |
| CHAMBLESS DITCH | California | Fair | 1930 | 96 | 502 |
| MARBLE DITCH | California | Fair | 1930 | 96 | 502 |
| PASTEL DITCH | California | Fair | 1930 | 96 | 502 |
| URLAN DITCH | California | Fair | 1930 | 96 | 510 |
| TERZILLA DITCH | California | Fair | 1930 | 96 | 510 |
| SCOTTY DITCH | California | Poor | 1930 | 96 | 502 |
| ADELIA DITCH | California | Poor | 1930 | 96 | 502 |
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.