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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
LTI CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2015 3,111
DRAINAGE CANAL Louisiana Scour Critical — Countermeasures Installed Good 2007 3,094
SANDY CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1979 3,092
LITTLE SANDY CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1955 3,092
DUGDEMONA RIVER Louisiana Scour Critical — Countermeasures Installed Fair 1976 3,086
Lil Cypress Bayou Louisiana Scour Critical — Countermeasures Installed Poor 1965 3,000
CASTOR CREEK Louisiana Scour Critical — Countermeasures Installed Good 2002 2,974
SLOUGH Louisiana Scour Critical — Countermeasures Installed Fair 1976 2,958
NORTH LABOVE BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 2013 2,899
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1960 2,894
BELLDEAU BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1973 2,890
Parc Perdu Bayou Louisiana Scour Critical — Countermeasures Installed Fair 1960 2,868
Parc Perdu Bayou Louisiana Scour Critical — Countermeasures Installed Fair 1960 2,868
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1967 2,862
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1970 2,862
COCKEREL CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1967 2,862
NATALBANY RIVER Louisiana Scour Critical — Countermeasures Installed Fair 1957 2,854
NORTH CHENIERE CR Louisiana Scour Critical — Countermeasures Installed Poor 1958 2,828
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1958 2,828
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1958 2,828
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1954 2,778
BULL BRANCH Louisiana Scour Critical — Countermeasures Installed Poor 1957 2,778
ALEXANDER CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1948 2,761
BAYOU AMY Louisiana Scour Critical — Countermeasures Installed Poor 1968 2,711
CANEY CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1954 2,642
CHAP CREEK RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1957 2,634
CHAPEPEELA CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1957 2,634
FLAT RIVER Louisiana Scour Critical — Countermeasures Installed Poor 1964 2,626
SPRDG TEX LINE JOHNSON B Louisiana Scour Critical — Countermeasures Installed Fair 1979 2,606
BAYOU DARBONNE Louisiana Scour Critical — Countermeasures Installed Fair 1978 2,567
SPRING BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1963 2,534
GRAND BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1966 2,500
SLOUGH Louisiana Scour Critical — Countermeasures Installed Fair 1966 2,500
BAYOU DARBONNE RELIEF Louisiana Scour Critical — Countermeasures Installed Poor 1952 2,487
EARL CREEK Louisiana Scour Critical — Countermeasures Installed Good 1967 2,479
LITTLE CHOUDRANT CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1975 2,458
CHOUDRANT CREEK RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1975 2,458
KITCHEN CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1973 2,440
FLAGON BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1973 2,440
FLAGON BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1973 2,440
TERRYS CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1935 2,403
S FORK CROSS B Louisiana Scour Critical — Countermeasures Installed Poor 1965 2,397
W FORK THOMPSON C Louisiana Scour Critical — Countermeasures Installed Fair 1959 2,392
NEGREET-CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1976 2,391
DRAINAGE CANAL Louisiana Scour Critical — Countermeasures Installed Fair 1951 2,382
CANE CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1976 2,369
FRAZIER CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1975 2,360
Parc Perdu Bayou Louisiana Scour Critical — Countermeasures Installed Fair 2008 2,336
BAYOU BOEUF Louisiana Scour Critical — Countermeasures Installed Fair 1985 2,324
LEATHERMAN CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1975 2,248

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