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.

Clear
Bridge State Condition Year Built Age (Years) ADT
FRIANT-KERN CANAL California Fair 1949 77 50
FRIANT-KERN CANAL California Good 1949 77 500
FRIANT-KERN CANAL California Good 1949 77 75
PACKWOOD CREEK California Good 1949 77 200
CAMERON CREEK California Fair 1949 77 250
OAKES DITCH California Fair 1949 77 450
OWENS RIVER California Fair 1949 77 4,550
LOWER MCNALLY CANAL California Fair 1949 77 4,550
WEST CORRAL DE PIEDRA CR California Fair 1949 77 2,438
BRIZZOLARA CREEK California Fair 1949 77 500
FRIANT-KERN CANAL California Fair 1949 77 2,260
FRIANT-KERN CANAL California Good 1949 77 600
KERN ISLAND CANAL California Fair 1949 77 3,659
FRIANT-KERN CANAL California Fair 1949 77 470
FRIANT-KERN CANAL California Fair 1949 77 150
FRIANT-KERN CANAL California Fair 1949 77 150
FRIANT-KERN CANAL California Good 1949 77 540
FRIANT-KERN CANAL California Good 1949 77 640
SANTA YNEZ RIVER California Poor 1949 77 3,000
N FORK MATILIJA CREEK California Good 1949 77 950
MEDEA CREEK California Fair 1949 77 160,000
VENDOME STREET California Good 1949 77 265,000
GORMAN CREEK California Good 1949 77 35,890
N&S110-S101 CONNECTOR RP California Good 1949 77 10,000
N101-N&S110 CONNECTR RMP California Good 1949 77 8,000
ROUTE 101 California Fair 1949 77 68,510
VIRGIL AVE California Good 1949 77 175,000
VIRGIL AVE California Good 1949 77 175,000
HOOVER STREET California Good 1949 77 175,000
CORONADO STREET California Fair 1949 77 175,000
ROUTE 101 California Fair 1949 77 5,000
ROUTE 101 California Fair 1949 77 4,200
ROUTE 101 California Fair 1949 77 3,500
BEAUDRY AVE California Good 1949 77 265,000
BEAUDRY AVE California Good 1949 77 69,401
N110-N101 & S110-S101 California Good 1949 77 156,000
ROUTE 110 California Good 1949 77 15,000
ROUTE 110 California Good 1949 77 35,000
I 110 101-110 CONNECTORS California Good 1949 77 175,000
I 110 101-110 CONNECTORS California Fair 1949 77 187,000
FIGUEROA STREET California Fair 1949 77 37,301
FIGUEROA STREET California Good 1949 77 35,000
FIGUEROA STREET California Fair 1949 77 175,000
FIGUEROA STREET California Fair 1949 77 175,000
ROUTE 101 California Good 1949 77 50,000
BELL CREEK California Good 1949 77 42,000
INTERSTATE 710 California Good 1949 77 25,000
CHESEBRO CRK California Good 1949 77 160,000
SAN GABRIEL RIV NF California Fair 1949 77 1,960
SAN GABRIEL RIV California Good 1949 77 20,275

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.