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Scour Critical Bridges in California

623 bridges in California at risk from water erosion around foundations.

Scour Critical Bridges

Scour is the erosion of soil and rock around a bridge's foundation caused by moving water. When foundations are exposed or undermined, a bridge can collapse even if its deck and superstructure are in good condition. Scour is the leading cause of bridge failures in the US. These 623 bridges in California have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
MUD CREEK California Scour Critical — Countermeasures Installed Good 1962 3,200
SANTA PAULA CREEK California Scour Critical — Countermeasures Installed Good 1969 3,150
MCCLURE CREEK California Scour Critical — Countermeasures Installed Fair 1918 3,140
DRY CREEK CANAL California Scour Critical — Countermeasures Installed Fair 1935 3,101
BUTTE CREEK California Scour Critical — Countermeasures Installed Fair 1970 3,013
SANTA YNEZ RIVER California Scour Critical — Countermeasures Installed Poor 1949 3,000
SANTA ANA RIVER California Scour Critical — Countermeasures Installed Fair 1960 2,800
RICE CREEK California Scour Critical — Countermeasures Installed Fair 1914 2,799
BRANNIN CREEK California Scour Critical — Countermeasures Installed Poor 1914 2,799
WEST BRANCH RUSSIAN RIV California Scour Critical — Countermeasures Installed Poor 1958 2,776
DRY CREEK California Scour Critical — Countermeasures Installed Fair 1987 2,769
ALAMEDA CREEK California Scour Critical — Countermeasures Installed Fair 1948 2,700
WILSON CREEK California Scour Critical — Countermeasures Installed Good 1927 2,678
FAIRFIELD CANAL California Scour Critical — Countermeasures Installed Fair 1950 2,569
WASTEWAY-FAIRFIELD CANAL California Scour Critical — Countermeasures Installed Good 1960 2,569
RUSSIAN RIVER California Scour Critical — Countermeasures Installed Fair 1987 2,514
DRY CREEK California Scour Critical — Countermeasures Installed Poor 1920 2,490
MORMON SLOUGH California Scour Critical — Countermeasures Installed Poor 1966 2,430
SACRAMENTO RIVER California Scour Critical — Countermeasures Installed Poor 1948 2,400
C & K CANAL California Scour Critical — Countermeasures Installed Fair 1925 2,300
GROUT CREEK California Scour Critical — Countermeasures Installed Good 1938 2,300
COW CREEK California Scour Critical — Countermeasures Installed Good 1955 2,178
KELSEY CREEK California Scour Critical — Countermeasures Installed Fair 1961 2,108
GARCIA RIVER California Scour Critical — Countermeasures Installed Good 1938 2,100
REDWOOD CREEK California Scour Critical — Countermeasures Installed Fair 1946 2,090
BEAR RIVER California Scour Critical — Countermeasures Installed Fair 1961 2,081
MERCED RIVER California Scour Critical — Countermeasures Installed Fair 1960 2,080
WALKER CREEK California Scour Critical — Countermeasures Installed Good 1936 2,051
YOSEMITE CREEK California Scour Critical — Countermeasures Installed Fair 1960 2,041
JEWETT CREEK California Scour Critical — Countermeasures Installed Fair 1914 2,025
HUTCHINSON CREEK California Scour Critical — Countermeasures Installed Poor 1952 2,000
WARDLOW WASH California Scour Critical — Countermeasures Installed Fair 1939 2,000
ZAYANTE CREEK California Scour Critical — Countermeasures Installed Poor 1948 2,000
STONE CORRAL CREEK California Scour Critical — Countermeasures Installed Poor 1927 1,976
UNNAMED STREAM California Scour Critical — Countermeasures Installed Good 1964 1,971
LOS BANOS CREEK California Scour Critical — Countermeasures Installed Fair 1965 1,960
WASTEWAY California Scour Critical — Countermeasures Installed Fair 1960 1,945
ARROYO MOCHO California Scour Critical — Countermeasures Installed Fair 1925 1,930
MOORE CREEK California Scour Critical — Countermeasures Installed Poor 1914 1,922
SAN ANTONIO CREEK California Scour Critical — Countermeasures Installed Fair 1932 1,920
NORTH PADDY CREEK California Scour Critical — Countermeasures Installed Fair 1964 1,882
FOWLER SWITCH CANAL California Scour Critical — Countermeasures Installed Fair 1921 1,800
PIT RIVER OVERFLOW California Scour Critical — Countermeasures Installed Fair 1925 1,800
GRIZZLEY SLOUGH California Scour Critical — Countermeasures Installed Fair 1931 1,785
HOODS CREEK California Scour Critical — Countermeasures Installed Good 1931 1,778
BRANCH ROCKYHONCUT CREEK California Scour Critical — Countermeasures Installed Fair 1940 1,740
DRY CREEK California Scour Critical — Countermeasures Installed Good 1948 1,630
PETROLEUM CREEK California Scour Critical — Countermeasures Installed Fair 1936 1,616
CHILES CREEK California Scour Critical — Countermeasures Installed Fair 1907 1,600
BRIDALVEIL CREEK California Scour Critical — Countermeasures Installed Fair 1933 1,517

Scour Critical Rating Codes

Code 2 — UnaddressedBridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures InstalledProtective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures IneffectiveProtective measures were installed but have been assessed as ineffective. The bridge requires re-evaluation and additional action.

About Scour Critical Bridges

Scour critical bridges have been identified through underwater inspection or analysis as having foundations that are unstable or could become unstable during flood conditions. FHWA requires action plans for all scour critical bridges. Famous scour failures include the 1987 Schoharie Creek Bridge collapse in New York.

All Bridges Poor Condition Historic Bridges Bridge Stats