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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
T.I.D. MAIN CANAL California Fair 1920 106 1,733
DRY CREEK TRIBUTARY California Fair 1920 106 35
MARTELLS CREEK California Poor 1920 106 182
MARTELLS CREEK California Fair 1920 106 182
M.I.D. LATERAL #2 California Fair 1920 106 3,678
T.I.D. UPPER LATERAL #3 California Fair 1920 106 1,478
DRY CREEK TRIBUTARY California Fair 1920 106 94
M.I.D. LATERAL #4 California Fair 1920 106 2,655
M.I.D. LATERAL #2 California Fair 1920 106 1,500
T.I.D. CERES MAIN CANAL California Fair 1920 106 45
M.I.D. LATERAL #5 California Fair 1920 106 500
GARZAS CREEK BYPASS California Fair 1920 106 7,475
EL CAPITAN CANAL California Fair 1920 106 6,500
QUINTO BYPASS California Fair 1920 106 7,475
PARNELL BYPASS California Fair 1920 106 7,475
MERCED RIVER California Fair 1920 106 7,750
MARIPOSA CREEK California Good 1920 106 441
MARIPOSA CREEK California Fair 1920 106 840
OWENS CREEK California Fair 1920 106 100
FINE GOLD CREEK California Fair 1920 106 65
HERNDON CANAL California Fair 1920 106 500
ARROYO DE LAS VIBORAS California Fair 1920 106 7,900
TEQUISQUITA SLOUGH California Good 1920 106 400
EAST BRANCH BIG CANAL California Fair 1920 106 4,200
CAMERON CREEK California Fair 1920 106 4,500
CAMERON CREEK California Fair 1920 106 4,500
ROCK CREEK California Good 1920 106 520
STENNER CREEK California Fair 1920 106 25,000
BR SAN LUIS OBISPO CREEK California Fair 1920 106 1,311
MEDEA CRK California Good 1920 106 8,910
SANTA YSABEL CREEK California Fair 1920 106 114
SUSAN RIVER California Fair 1921 105 600
DEER CREEK OVERFLOW California Fair 1921 105 6,800
S BR OF N FK MILL CREEK California Fair 1921 105 9,300
COLDFORK COTTONWOOD CRK California Poor 1921 105 60
SACRAMENTO RIV OVERFLOW California Fair 1921 105 1,000
BIGGS EXTENSION CANAL California Fair 1921 105 11,050
BIG CHICO CREEK California Fair 1921 105 17,400
GABLE DRAW California Good 1921 105 11,700
ROCK CREEK OVERFLOW California Good 1921 105 11,700
ROCK CREEK OVERFLOW California Good 1921 105 11,700
ROCK CREEK California Good 1921 105 11,700
KUSAL SLOUGH California Good 1921 105 11,700
DIANES DITCH California Fair 1921 105 276
PINE CREEK California Poor 1921 105 276
DIANES DITCH NO 2 California Fair 1921 105 276
KUSEL SLOUGH California Good 1921 105 3,199
DOBBINS CREEK California Fair 1921 105 530
TENNESSEE CREEK California Fair 1921 105 180
SHADY CREEK California Fair 1921 105 50

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