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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
HERBERT CREEK California Scour Critical — Countermeasures Installed Fair 1956 70
SOUTH FORK EEL RIVER California Scour Critical — Countermeasures Installed Fair 1934 69
ATWELL CREEK California Scour Critical — Countermeasures Installed Fair 1960 68
EEL RIVER California Scour Critical — Countermeasures Installed Fair 1957 66
INDIAN CREEK California Scour Critical — Countermeasures Installed Fair 1930 65
NORTH FORK WILSON CREEK California Scour Critical — Countermeasures Installed Fair 1972 60
BEAUREGUARD CREEK California Scour Critical — Countermeasures Installed Fair 1967 60
CANYON CREEK California Scour Critical — Countermeasures Installed Fair 1951 55
CLARKS VALLEY CREEK California Scour Critical — Countermeasures Installed Good 1950 55
BLANKET CREEK California Scour Critical — Countermeasures Installed Fair 1936 55
SPRING BRANCH CREEK California Scour Critical — Countermeasures Installed Fair 1918 54
SLATE CREEK California Scour Critical — Countermeasures Installed Fair 1927 52
DRY CREEK TRIBUTARY California Scour Critical — Countermeasures Installed Fair 1925 52
EAST FORK HAYFORK CREEK California Scour Critical — Countermeasures Installed Fair 1965 50
EAST FORK HAYFORK CREEK California Scour Critical — Countermeasures Installed Fair 2004 50
JANEEN CREEK California Scour Critical — Countermeasures Installed Fair 1940 50
NEVADA CREEK California Scour Critical — Countermeasures Installed Poor 1940 50
E BR N FK FEATHER RIVER California Scour Critical — Countermeasures Installed Fair 1957 50
E BR N FK FEATHER RIVER California Scour Critical — Countermeasures Installed Fair 1949 50
SPANISH CREEK California Scour Critical — Countermeasures Installed Fair 1962 50
ESTRAY CREEK California Scour Critical — Countermeasures Installed Fair 1984 50
EDGAR SLOUGH OVERFLOW California Scour Critical — Countermeasures Installed Fair 1927 50
SOUTH YUBA RIVER California Scour Critical — Countermeasures Installed Fair 1925 50
BERENDA CREEK California Scour Critical — Countermeasures Installed Good 1987 50
COTTONWOOD CREEK California Scour Critical — Countermeasures Installed Fair 1940 50
Butte Creek California Scour Critical — Countermeasures Installed Poor 1980 50
MERCED RIVER California Scour Critical — Countermeasures Installed Fair 1929 50
PINE CREEK California Scour Critical — Countermeasures Installed Fair 1940 49
S FK WILLOW CREEK California Scour Critical — Countermeasures Installed Fair 1916 46
JESUS MARIA CREEK California Scour Critical — Countermeasures Installed Fair 1952 43
GLENN-COLUSA CANAL California Scour Critical — Countermeasures Installed Fair 1940 42
SIMMERLY SLOUGH California Scour Critical — Countermeasures Installed Poor 1928 40
PRICE CREEK California Scour Critical — Countermeasures Installed Fair 1953 39
SHIRLEY CREEK California Scour Critical — Countermeasures Installed Fair 1935 37
RYDBERG CREEK California Scour Critical — Countermeasures Installed Poor 1922 37
PINE CREEK California Scour Critical — Countermeasures Installed Fair 1960 35
INDIAN CREEK California Scour Critical — Countermeasures Installed Fair 1930 35
LITTLE DRY CREEK California Scour Critical — Countermeasures Installed Fair 1930 33
CLARKS VALLEY CREEK California Scour Critical — Countermeasures Installed Poor 1935 27
MATTOLE RIVER California Scour Critical — Countermeasures Installed Fair 1967 26
EEL RIVER California Scour Critical — Countermeasures Installed Fair 1961 25
JAMES CREEK California Scour Critical — Countermeasures Installed Fair 1980 25
JAMES CREEK California Scour Critical — Countermeasures Installed Fair 1981 25
WATSON CREEK California Scour Critical — Countermeasures Installed Fair 1960 25
HASS SLOUGH California Scour Critical — Countermeasures Installed Poor 1959 25
DEER CREEK California Scour Critical — Countermeasures Installed Fair 1967 25
S FK OF MID FK OF TUL RI California Scour Critical — Countermeasures Installed Fair 1932 25
DEER CREEK California Scour Critical — Countermeasures Installed Poor 1939 25
BRANCH OF LAS TABLAS CRK California Scour Critical — Countermeasures Installed Fair 1950 25
HUNTING CREEK California Scour Critical — Countermeasures Installed Fair 2003 25

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