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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
20 ARPENT CANAL Louisiana Scour Critical — Countermeasures Installed Fair 1985 880
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1971 878
SANDY LAKE BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1974 878
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1974 878
LITTLE CHAPEPEELA CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1992 878
ANTWINE CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1975 873
WILSON CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1966 868
CYPRESS CR RELIEF Louisiana Scour Critical — Countermeasures Installed Poor 1966 866
CYPRESS CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1966 866
TWELVE MILE CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1957 865
20 Arpent Canal Louisiana Scour Critical — Countermeasures Installed Fair 1997 863
CANEY BRANCH Louisiana Scour Critical — Countermeasures Installed Good 1968 860
W HOG BRANCH BR Louisiana Scour Critical — Countermeasures Installed Fair 1968 860
HOG BRANCH RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1968 860
HOG BRANCH RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1968 860
E HOG BRANCH Louisiana Scour Critical — Countermeasures Installed Good 1968 860
CANEY CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1970 859
FOUR MILE BAYOU RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1948 856
FOUR MILE BAYOU RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1948 856
FOUR MILE BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1948 856
BLACK LAKE BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1979 856
BLACK LAKE SLOUGH Louisiana Scour Critical — Countermeasures Installed Good 1979 856
BODCAU BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1969 846
DRY CYPRESS BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1981 846
LITTLE CORNEY BAYOU RELF Louisiana Scour Critical — Countermeasures Installed Fair 1980 836
LITTLE CORNEY BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1980 836
COW BRANCH Louisiana Scour Critical — Countermeasures Installed Poor 1971 833
COTTON PATCH BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1960 825
DRY CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1957 825
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1978 818
BLACK BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1962 817
RATTLE SNAKE BAYOU Louisiana Scour Critical — Countermeasures Installed Good 1993 806
WEST COYELL CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2001 800
ILE DES CANNES COULEE Louisiana Scour Critical — Countermeasures Installed Fair 1974 800
CROWS CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1954 780
BRINSON CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1984 780
BLACK LAKE CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1984 780
KEPLER CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1961 780
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1980 776
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1974 776
HICKORY BRANCH Louisiana Scour Critical — Countermeasures Installed Good 1978 776
Clarke Bayou Louisiana Scour Critical — Countermeasures Installed Good 2016 775
BAYOU CHICOT Louisiana Scour Critical — Countermeasures Installed Poor 1970 772
BLOOMS MILL CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1971 771
CLEMENT CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1958 769
COULEE VALENTINE Louisiana Scour Critical — Countermeasures Installed Fair 1959 759
BAYOU DURALDE Louisiana Scour Critical — Countermeasures Installed Fair 1959 759
JOES BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1967 759
DRY CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1975 759
BIG CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1975 759

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