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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
DRY CREEK TRIBUTARY California Scour Critical — Countermeasures Installed Fair 1930 170
MCKEE OVERFLOW California Scour Critical — Countermeasures Installed Poor 1935 157
JUDD CREEK California Scour Critical — Countermeasures Installed Fair 1940 154
ANDERSON CREEK California Scour Critical — Countermeasures Installed Fair 1940 154
LURLINE CREEK California Scour Critical — Countermeasures Installed Good 1974 152
LITTLE RIVER California Scour Critical — Countermeasures Installed Poor 1951 150
SPANISH CREEK California Scour Critical — Countermeasures Installed Fair 1914 140
ROBINSON CREEK California Scour Critical — Countermeasures Installed Fair 1960 139
SHERWOOD CREEK California Scour Critical — Countermeasures Installed Poor 1979 137
LITTLE DRY CREEK California Scour Critical — Countermeasures Installed Good 1930 133
DURHAM MUTUAL DITCH California Scour Critical — Countermeasures Installed Poor 1949 130
CLEAR CREEK California Scour Critical — Countermeasures Installed Fair 1951 130
SOUTH FORK NOYO RIVER California Scour Critical — Countermeasures Installed Fair 1948 125
CALAVERAS RIVER California Scour Critical — Countermeasures Installed Fair 1976 122
CRAWFORD CREEK California Scour Critical — Countermeasures Installed Good 1960 120
WATSON CREEK California Scour Critical — Countermeasures Installed Poor 1920 120
PRICE CREEK California Scour Critical — Countermeasures Installed Fair 1940 118
HOSSELKUS CREEK California Scour Critical — Countermeasures Installed Fair 1983 115
CONLEY CREEK California Scour Critical — Countermeasures Installed Fair 1990 114
COLUSA DRAIN California Scour Critical — Countermeasures Installed Good 1945 113
SOUTH FORK EEL RIVER California Scour Critical — Countermeasures Installed Fair 1965 110
ANDERSON CREEK California Scour Critical — Countermeasures Installed Fair 1945 104
CCID MAIN CANAL California Scour Critical — Countermeasures Installed Fair 1926 102
BUTLER CREEK California Scour Critical — Countermeasures Installed Fair 1938 101
MILL CREEK California Scour Critical — Countermeasures Installed Fair 1949 100
DUTTON CREEK California Scour Critical — Countermeasures Installed Poor 1950 100
NORTH FORK COTTONWOOD CR California Scour Critical — Countermeasures Installed Good 1966 100
SUSAN RIVER California Scour Critical — Countermeasures Installed Fair 1970 100
LONG VALLEY CREEK California Scour Critical — Countermeasures Installed Fair 1975 100
S FORK PINE CREEK California Scour Critical — Countermeasures Installed Fair 1937 100
SERENITY DITCH California Scour Critical — Countermeasures Installed Fair 1941 100
SALMON CREEK California Scour Critical — Countermeasures Installed Fair 1960 100
TEMPLE CREEK California Scour Critical — Countermeasures Installed Fair 1920 100
WATTS CREEK California Scour Critical — Countermeasures Installed Fair 1925 100
LOS GATOS CREEK California Scour Critical — Countermeasures Installed Poor 1945 100
NORTH FORK TULE RIVER California Scour Critical — Countermeasures Installed Fair 1967 100
KRAMER CREEK California Scour Critical — Countermeasures Installed Fair 1932 100
COTTONTAIL CREEK California Scour Critical — Countermeasures Installed Fair 1940 100
NORTH FORK GUALALA RIVER California Scour Critical — Countermeasures Installed Poor 1940 97
CHEROKEE DRAIN California Scour Critical — Countermeasures Installed Poor 1920 97
DRY CREEK TRIBUTARY California Scour Critical — Countermeasures Installed Fair 1920 94
PESCADERO CREEK California Scour Critical — Countermeasures Installed Poor 1962 91
WARNER CREEK California Scour Critical — Countermeasures Installed Fair 1965 90
WILLOW CREEK California Scour Critical — Countermeasures Installed Fair 1935 87
SOUTH DOBBYN CREEK California Scour Critical — Countermeasures Installed Poor 1949 85
STEMPLE CREEK California Scour Critical — Countermeasures Installed Good 1958 80
CLEAR GULCH California Scour Critical — Countermeasures Installed Fair 1955 75
UNION CREEK California Scour Critical — Countermeasures Installed Fair 1956 75
COLEMAN CREEK California Scour Critical — Countermeasures Installed Fair 1940 72
CHOWCHILLA RIVER California Scour Critical — Countermeasures Installed Good 1975 71

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