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Scour Critical Bridges in Louisiana

1,302 bridges in Louisiana 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 1,302 bridges in Louisiana have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1954 8,262
BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1954 8,262
HOLDEN BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1954 8,262
BOGUE CHITTO RIVER Louisiana Scour Critical — Countermeasures Installed Good 1974 8,257
BOGUE CHITTO RV. RELIEF Louisiana Scour Critical — Countermeasures Installed Good 1975 8,257
VERMILION RIVER Louisiana Scour Critical — Countermeasures Installed Fair 1971 8,240
LAFOURCHE BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1966 8,110
STEEP BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1955 8,105
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1955 8,105
CHENIERE CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1955 8,105
PONCHATOULA CR. Louisiana Scour Critical — Countermeasures Installed Fair 1932 7,716
CROSS BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1960 7,587
BRUSHY BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1975 7,518
BOGUE CHITTO RV RELIEF Louisiana Scour Critical — Countermeasures Installed Good 1975 7,481
BOGUE CHITTO RIVER Louisiana Scour Critical — Countermeasures Installed Good 1974 7,481
COYELL CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1953 7,215
WEST COLYELL CR Louisiana Scour Critical — Countermeasures Installed Fair 1963 7,211
YELLOW WATER RIVER Louisiana Scour Critical — Countermeasures Installed Poor 1958 7,190
TICKFAW RIVER Louisiana Scour Critical — Countermeasures Installed Fair 1949 7,126
HOG BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1932 7,126
BIG CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2007 7,084
FISH CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1948 7,084
OLD SLOUGH Louisiana Scour Critical — Countermeasures Installed Fair 2007 7,084
RAMBIN BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 2000 6,956
RAMBIN BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1978 6,604
BIG CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2006 6,586
WEST COLYELL CR Louisiana Scour Critical — Countermeasures Installed Fair 1952 6,554
SKULLS CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1954 6,478
TANG RIVER RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1955 6,478
TANGIPAHOA RIVER RELIEF Louisiana Scour Critical — Countermeasures Installed Good 1986 6,478
TANGIPAHOA RIVER Louisiana Scour Critical — Countermeasures Installed Poor 1939 6,435
DRAIN Louisiana Scour Critical — Countermeasures Installed Fair 1939 6,435
DRAIN Louisiana Scour Critical — Countermeasures Installed Fair 1939 6,435
CHENIERE CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2000 6,382
BAYOU CASTOR Louisiana Scour Critical — Countermeasures Installed Poor 1951 6,314
PONCHATOULA CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1956 6,250
Chatlin Lake Canal Louisiana Scour Critical — Countermeasures Installed Good 2006 6,200
RODDY BAYOU Louisiana Scour Critical — Countermeasures Installed Good 2007 6,131
FOX BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1968 6,010
TRIB TO BOGGY BAYOU Louisiana Scour Critical — Countermeasures Installed Good 2009 6,000
COMITE RIVER Louisiana Scour Critical — Countermeasures Installed Fair 1965 5,772
SQUIRES CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1982 5,661
BEAR CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1977 5,659
Outfall Canal Louisiana Scour Critical — Countermeasures Installed Good 2010 5,650
Fallout Canal Louisiana Scour Critical — Countermeasures Installed Good 2010 5,650
Yellow Water River Louisiana Scour Critical — Countermeasures Installed Fair 1976 5,582
DRAIN Louisiana Scour Critical — Countermeasures Installed Fair 1965 5,485
PUSHAPATAPA CR Louisiana Scour Critical — Countermeasures Installed Good 1965 5,485
FOX SKIN BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1979 5,436
BLACK BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1971 5,367

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