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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
SAN MATEO CREEK California Good 1904 122 10,000
WEST UNION CREEK California Good 1905 121 2,075
SAN LUIS OBISPO CREEK California Poor 1905 121 30
LITTLE CHICO CREEK California Fair 1906 120 613
SANDY GULCH California Fair 1906 120 325
SANTA ROSA CREEK California Good 1906 120 8,600
RTE 10 CONN BUSWAY California Fair 1906 120 15,000
CHILES CREEK California Fair 1907 119 1,600
PLEASANTS CREEK California Good 1907 119 500
MILLER CANYON CREEK California Fair 1907 119 817
STEVENS CREEK California Good 1907 119 49,000
CARROLL CANAL California Fair 1907 119 1,582
LINNIE CANAL California Fair 1907 119 1,582
HOWLAND CANAL California Fair 1907 119 1,582
SHERMAN CANAL California Fair 1907 119 1,582
MID FK FEATHER RIV OVRFL California Fair 1908 118 40
SAINT HELENA CREEK California Fair 1908 118 114
MILLIKEN CREEK California Fair 1908 118 3,000
SULPHUR CREEK California Fair 1908 118 2,790
ROSS CREEK California Good 1908 118 1,200
CHOLLAS CREEK California Good 1908 118 7,578
SCOTT RIVER California Poor 1909 117 20
SOUTH FORK REEDS CREEK California Fair 1909 117 190
BIG SULPHUR CREEK California Fair 1909 117 140
NATHANSON CREEK California Fair 1909 117 820
MAXWELL CREEK California Fair 1909 117 140
SUISUN CREEK California Fair 1909 117 1,052
COSUMNES RIVER California Fair 1909 117 21
ROSS CREEK California Fair 1909 117 2,370
CORTE MADERA CREEK California Fair 1909 117 2,000
ROSS CREEK California Good 1909 117 1,800
ANGELS CREEK California Fair 1909 117 9,100
ANGELS CREEK California Fair 1909 117 2,064
SAN LEANDRO CREEK California Fair 1909 117 7,900
SAN LORENZO CREEK California Fair 1909 117 50,000
UPPER PENITENCIA CREEK California Good 1909 117 1,390
LITTLE ARTHUR CREEK California Fair 1909 117 400
STENNER CREEK California Fair 1909 117 4,496
GAVIOTA CREEK California Fair 1909 117 5
LA RIV BNSF UPRR METRO California Fair 1909 117 23,648
ARROYO SECO CHANNEL California Fair 1909 117 16,300
SCOTT RIVER California Poor 1910 116 172
SLATE CREEK California Fair 1910 116 50
MIDDLE FORK FEATHER RIV California Fair 1910 116 370
CAT TAIL SLOUGH California Fair 1910 116 13,400
BIGGS EXTENSION CANAL California Fair 1910 116 930
WYMAN RAVINE California Fair 1910 116 71
SUTTER-BUTTE CANAL California Poor 1910 116 193
MARK WEST CREEK California Fair 1910 116 2,338
SULPHUR CREEK California Fair 1910 116 24,000

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.

All Bridges Poor Condition Scour Critical Bridge Stats