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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
Cripple Creek Louisiana Scour Critical — Countermeasures Installed Good 2021 50
CANEY CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1976 50
BAYOU BARBARY Louisiana Scour Critical — Countermeasures Installed Fair 2017 50
COULEE Louisiana Scour Critical — Countermeasures Installed Fair 1999 48
TRIB. TO CHOCTAW BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1969 45
COCODRIE BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 2009 42
FLAT LICK BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1962 42
TRIBUTARY TO BEAR CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1978 40
Stillhouse Bayou Trib Louisiana Scour Critical — Countermeasures Installed Poor 1991 40
Stillhouse Bayou Trib Louisiana Scour Critical — Countermeasures Installed Poor 1991 40
BUSHNECK BAYOU TRIB. Louisiana Scour Critical — Countermeasures Installed Fair 1985 40
KECHI MRSHS TRBY BSHNK B Louisiana Scour Critical — Countermeasures Installed Fair 1985 40
BUCHANAN BAYOU TRIB Louisiana Scour Critical — Countermeasures Installed Fair 1993 40
BUCHANAN BAYOU TRIB Louisiana Scour Critical — Countermeasures Installed Fair 1993 40
TRIBUTARY TO WALNUT B. Louisiana Scour Critical — Countermeasures Installed Fair 1983 40
CLYDE PL VIV RD BLACK B. Louisiana Scour Critical — Countermeasures Installed Fair 1980 40
TRIBUTARY TO BIG BRANCH Louisiana Scour Critical — Countermeasures Installed Good 1987 40
BIG BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1948 40
CASTOR BAYOU NASH RD. 14 Louisiana Scour Critical — Countermeasures Installed Fair 1984 40
CASTOR BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1984 40
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1969 40
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1970 40
CLEAR CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2004 40
LITTLE INDIAN CREEK Louisiana Scour Critical — Countermeasures Installed Poor 2004 40
Hammer Creek Louisiana Scour Critical — Countermeasures Installed Good 2022 40
Dairy Creek Louisiana Scour Critical — Countermeasures Installed Good 2022 40
TUCSON LN TRBY BUCHAN B. Louisiana Scour Critical — Countermeasures Installed Fair 1984 39
STATE LINE CREEK TRIB Louisiana Scour Critical — Countermeasures Installed Fair 1991 39
BOGGY BAYOU TRIB Louisiana Scour Critical — Countermeasures Installed Fair 1992 38
TRIB.-BLACK BAYOU LAKE Louisiana Scour Critical — Countermeasures Installed Fair 1992 38
BLACK BAYOU TRIB Louisiana Scour Critical — Countermeasures Installed Good 1992 38
TRIB TO FLAT LICK BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1979 37
PRAIRION BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1960 37
DRAIN TO CHENIERE BRAKE Louisiana Scour Critical — Countermeasures Installed Poor 1979 37
BRANCH OF CYPRESS CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1965 32
CYPRESS CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1965 32
Gales Cr Louisiana Scour Critical — Countermeasures Installed Poor 1970 32
LAKE ST PETER CANAL Louisiana Scour Critical — Countermeasures Installed Fair 1982 31
SIX MILE CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1977 30
Bodcau Bayou Trib Louisiana Scour Critical — Countermeasures Installed Fair 1987 30
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1960 30
BOGGY BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1955 30
DRAINAGE CREEK Louisiana Scour Critical — Countermeasures Installed Poor 2004 30
CAMERON CANAL Louisiana Scour Critical — Countermeasures Installed Fair 2015 28
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2008 27
BOONE CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1988 25
BEARHEAD CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1983 25
BAYOU CLEAR Louisiana Scour Critical — Countermeasures Installed Good 1988 25
NEW RIVER CANAL Louisiana Scour Critical — Countermeasures Installed Poor 1994 25
FARM POND Louisiana Scour Critical — Countermeasures Installed Good 2003 24

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