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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
LION CANYON CREEK California Good 1912 114 2,400
SR 110 ARROYO SECO ETC California Good 1912 114 16,000
ARROYO SECO CHANNEL California Good 1912 114 26,327
CARBON CANYON CHANNEL California Fair 1912 114 1,000
CUMMISKEY CREEK California Fair 1913 113 1,252
STONY CREEK California Poor 1913 113 4,157
PRUITT CREEK California Fair 1913 113 9,000
SOTOYOME CREEK California Fair 1913 113 5,900
NAPA RIVER California Fair 1913 113 2,600
DRY SLOUGH California Fair 1913 113 100
JACKSON CREEK California Fair 1913 113 3,000
SAN LORENZO CREEK California Fair 1913 113 23,400
COLMA CREEK California Fair 1913 113 28,500
SAN FRANCISQUITO CREEK California Fair 1913 113 33,000
LERDO CANAL California Fair 1913 113 90,000
ARROYO BLVD / ARROYO S California Good 1913 113 10,600
ARROYO SECO CHANNEL California Fair 1913 113 19,200
EAST FORK SCOTT RIVER California Fair 1914 112 23
SPRING GULCH California Good 1914 112 9,800
GAY CREEK California Good 1914 112 2,001
MOORE CREEK California Poor 1914 112 1,922
SOUR GRASS CREEK California Fair 1914 112 1,922
RICE CREEK California Fair 1914 112 2,799
BRANNIN CREEK California Poor 1914 112 2,799
HALL CREEK California Fair 1914 112 3,348
SCHRAMM CREEK California Good 1914 112 3,348
BURCH CREEK California Fair 1914 112 3,800
JEWETT CREEK California Fair 1914 112 2,025
SPANISH CREEK California Fair 1914 112 140
LOGAN CREEK California Fair 1914 112 447
NORTH FORK LOGAN CREEK California Good 1914 112 460
CAMPBELL CREEK California Fair 1914 112 11,600
BUTTE CREEK California Poor 1914 112 122
GLENN VALLEY SLOUGH OFLO California Good 1914 112 1,298
RUSSIAN RIVER California Poor 1914 112 10,000
NATHANSON CREEK California Fair 1914 112 2,100
WEBER CREEK California Fair 1914 112 2,049
SAN ANDREAS CREEK California Fair 1914 112 1,443
CHINESE CREEK California Poor 1914 112 2,800
ALKALI CREEK California Fair 1914 112 16,000
CURTIS CREEK California Fair 1914 112 502
MILLS CREEK California Fair 1914 112 477
M.I.D. LATERAL #4 California Fair 1914 112 9,356
T.I.D. CERES MAIN CANAL California Poor 1914 112 473
DUCK SLOUGH California Fair 1914 112 384
DUCK SLOUGH OVERFLOW California Fair 1914 112 384
OWENS CREEK California Fair 1914 112 384
HARTNELL GULCH California Fair 1914 112 3,000
CORBETT CANYON CREEK California Good 1914 112 3,350
EAST BRANCH CANAL California Fair 1914 112 29,000

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