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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
DREDGER GULCH California Fair 1922 104 230
DRY CREEK OVERFLOW California Fair 1922 104 10
YELLOW CREEK California Good 1922 104 16,150
BRANCH ARROYO SECO California Fair 1922 104 19,000
JONIVE CREEK California Good 1922 104 6,700
JONIVE CREEK 1 California Good 1922 104 7,000
NAPA RIVER California Good 1922 104 2,600
WEBER CREEK California Fair 1922 104 857
LONE TREE CREEK California Good 1922 104 1,022
LONE TREE CREEK California Fair 1922 104 1,022
CURTIS CREEK California Fair 1922 104 957
ARROYO DE LOS FRIJOLES California Fair 1922 104 175
HILLSIDE California Fair 1922 104 5,000
HILLSIDE California Good 1922 104 5,000
HILLSIDE California Fair 1922 104 5,000
MARSHALL CREEK California Fair 1922 104 21,100
KILLDEER CREEK California Fair 1922 104 30,750
STEVENS CREEK California Fair 1922 104 15,041
PENITENCIA CREEK California Good 1922 104 10
M.I.D. LATERAL #6 California Fair 1922 104 1,165
M.I.D. MAIN CANAL California Poor 1922 104 3,475
RYDBERG CREEK California Poor 1922 104 37
JOHNSON CREEK California Fair 1922 104 35
M.I.D. LATERAL #4 California Fair 1922 104 646
SAN JUAN CANAL California Fair 1922 104 500
MURPHY SLOUGH California Fair 1922 104 340
MURPHY SLOUGH California Fair 1922 104 2,200
KINGS RIV (WEST CHANNEL) California Fair 1922 104 750
KINGS RIV (E CHANNEL) California Good 1922 104 750
SALT CREEK California Fair 1922 104 5,000
KAWEAH RIVER California Poor 1922 104 1,650
STENNER CREEK California Fair 1922 104 2,549
HILLSIDE California Fair 1922 104 4,350
SAN GABRIEL RIV California Fair 1922 104 33,043
ARROYO SECO CHAN California Good 1922 104 381
BREA CREEK CHANNEL California Good 1922 104 1,556
BREA CREEK CHANNEL California Good 1922 104 8,500
HATFIELD CREEK California Good 1922 104 9,700
BALLENA CREEK California Good 1922 104 6,500
COASTLINE RAVINE California Fair 1922 104 1,000
YOSEMITE CREEK California Fair 1922 104 3,416
LUMGREY CREEK California Fair 1923 103 650
EMPIRE CREEK California Fair 1923 103 800
JUNIPER CREEK California Fair 1923 103 171
HAY CREEK California Fair 1923 103 1,005
RUSH CREEK California Fair 1923 103 75
NORTH FORK ELK RIVER California Fair 1923 103 156
BOULDER CREEK California Fair 1923 103 106
MANZANITA CREEK California Good 1923 103 3,650
SALT CREEK California Good 1923 103 4,475

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