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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
CCID MAIN CANAL California Scour Critical — Countermeasures Installed Fair 1926 340
MURPHY SLOUGH California Scour Critical — Countermeasures Installed Fair 1922 340
SALMON CREEK California Scour Critical — Countermeasures Installed Poor 1931 328
SANDY GULCH California Scour Critical — Countermeasures Installed Fair 1906 325
SNAKE RIVER California Scour Critical — Countermeasures Installed Poor 1925 325
GLENDENNING CREEK California Scour Critical — Countermeasures Installed Good 1930 321
SACRAMENTO RIVER California Scour Critical — Countermeasures Installed Fair 1915 320
BIG CANYON CREEK California Scour Critical — Countermeasures Installed Poor 1930 308
PENA CREEK California Scour Critical — Countermeasures Installed Fair 1924 300
EASTON CREEK California Scour Critical — Countermeasures Installed Fair 1936 300
SAN LORENZO RIVER California Scour Critical — Countermeasures Installed Fair 1940 300
WEST FORK SULPHUR CREEK California Scour Critical — Countermeasures Installed Fair 1964 300
UVAS CREEK California Scour Critical — Countermeasures Installed Fair 1927 300
EASTSIDE BYPASS CHANNEL California Scour Critical — Countermeasures Installed Poor 1965 300
C & K CANAL California Scour Critical — Countermeasures Installed Fair 1925 300
KINGSBURG BRANCH CANAL California Scour Critical — Countermeasures Installed Fair 1925 300
FOWLER SWITCH CANAL California Scour Critical — Countermeasures Installed Fair 1941 300
JACALITOS CREEK California Scour Critical — Countermeasures Installed Fair 1940 290
S FORK AMERICAN RIVER California Scour Critical — Countermeasures Installed Fair 1962 285
SOUTH FORK KINGS RIVER California Scour Critical — Countermeasures Installed Fair 1953 278
SOUTH FORK KINGS RIVER California Scour Critical — Countermeasures Installed Fair 1950 278
PINE CREEK California Scour Critical — Countermeasures Installed Poor 1921 276
JONIVE CREEK California Scour Critical — Countermeasures Installed Fair 1963 270
STONE CORRAL CREEK California Scour Critical — Countermeasures Installed Good 1947 268
CURTIS CREEK California Scour Critical — Countermeasures Installed Fair 1925 265
SONOMA CREEK California Scour Critical — Countermeasures Installed Fair 1935 250
FRESNO CANAL California Scour Critical — Countermeasures Installed Fair 1925 250
SOUTH BRANCH PIT RIVER California Scour Critical — Countermeasures Installed Good 1958 245
COTTONWOOD CREEK California Scour Critical — Countermeasures Installed Fair 1937 240
JUNIPER GULCH California Scour Critical — Countermeasures Installed Poor 1975 232
CROSS CREEK California Scour Critical — Countermeasures Installed Good 1962 225
WOLF CREEK California Scour Critical — Countermeasures Installed Fair 1967 220
MUD CREEK California Scour Critical — Countermeasures Installed Fair 1962 219
SAN ANTONIO CREEK California Scour Critical — Countermeasures Installed Fair 1930 216
MILL CREEK California Scour Critical — Countermeasures Installed Fair 1961 210
MILL CREEK California Scour Critical — Countermeasures Installed Fair 1966 210
LOS ANGELES AQUEDUCT California Scour Critical — Countermeasures Installed Good 1919 204
YREKA CREEK California Scour Critical — Countermeasures Installed Poor 1987 200
DRY CREEK California Scour Critical — Countermeasures Installed Fair 1960 200
THOMES CREEK California Scour Critical — Countermeasures Installed Fair 1948 200
WARD CREEK California Scour Critical — Countermeasures Installed Fair 1973 200
BIG AUSTIN CREEK California Scour Critical — Countermeasures Installed Fair 1965 200
TWO BAR CREEK California Scour Critical — Countermeasures Installed Fair 1959 200
STINSON CANAL California Scour Critical — Countermeasures Installed Fair 1925 200
DRY CREEK California Scour Critical — Countermeasures Installed Fair 1959 198
EDGAR SLOUGH OVERFLOW California Scour Critical — Countermeasures Installed Fair 1935 184
MARTELLS CREEK California Scour Critical — Countermeasures Installed Poor 1920 182
DUCK CREEK California Scour Critical — Countermeasures Installed Poor 1931 179
KINGS RIVER D/S OF DAM California Scour Critical — Countermeasures Installed Fair 1956 175
SCOTT RIVER California Scour Critical — Countermeasures Installed Poor 1910 172

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