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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
EAST HOG BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1962 601
BAYOU DES CANNES RELIEF Louisiana Scour Critical — Countermeasures Installed Good 1954 598
TOUCHETS CANAL Louisiana Scour Critical — Countermeasures Installed Good 2009 591
BEAR BRANCH Louisiana Scour Critical — Countermeasures Installed Fair 1973 590
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1973 590
BAYOU CHICOT Louisiana Scour Critical — Countermeasures Installed Poor 1969 590
STANLEY CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1974 589
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1975 589
POVERTY POINT Louisiana Scour Critical — Countermeasures Installed Fair 1975 588
CREEK REDWOOD Louisiana Scour Critical — Countermeasures Installed Good 1958 586
BLACK LAKE BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1980 582
BLACKLAKE BAYOU RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 2000 582
BOGUE CHITTO CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1983 582
BAYOU GRAND CANE Louisiana Scour Critical — Countermeasures Installed Fair 1977 581
BAYOU GRAND CANE RELIEF Louisiana Scour Critical — Countermeasures Installed Poor 1977 581
COOK CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1977 581
CALCASIEU RIVER Louisiana Scour Critical — Countermeasures Installed Fair 1960 581
CALCASIEU RIVER RELIEF Louisiana Scour Critical — Countermeasures Installed Fair 1985 581
BEAVER CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1960 574
BUTTON CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1973 574
NATALBANY RIVER Louisiana Scour Critical — Countermeasures Installed Fair 1956 572
BEECH CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1970 570
BAYOU RIGOLETTE Louisiana Scour Critical — Countermeasures Installed Good 1999 570
CREOSOTE BRANCH Louisiana Scour Critical — Countermeasures Installed Poor 1968 569
LITTLE COLEWA BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1980 565
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1980 565
COLEWA BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1980 565
TALISHEEK CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1977 560
EAST BEDICO CREEK Louisiana Scour Critical — Countermeasures Installed Fair 2009 559
CYPRESS CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1951 556
DORCHEAT B RELIEF Louisiana Scour Critical — Countermeasures Installed Poor 1966 537
DORCHEAT BAYOU RELIEF Louisiana Scour Critical — Countermeasures Installed Poor 1977 537
DORCHEAT B RELIEF Louisiana Scour Critical — Countermeasures Installed Poor 1966 537
BEAVER BRANCH Louisiana Scour Critical — Countermeasures Installed Poor 1967 532
EDMISTON CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1976 532
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1955 532
CYPRESS BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1955 532
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1977 532
DRAIN Louisiana Scour Critical — Countermeasures Installed Fair 1965 532
HAYS CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1970 528
STOWE CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1961 527
STOWE CR REL BR Louisiana Scour Critical — Countermeasures Installed Poor 1961 527
SALINE BAYOU Louisiana Scour Critical — Countermeasures Installed Poor 1952 525
THOMPSON CREEK TRIBUTARY Louisiana Scour Critical — Countermeasures Installed Poor 1973 525
HAMMER CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1973 525
CREEK Louisiana Scour Critical — Countermeasures Installed Poor 1926 525
GILMER BAYOU Louisiana Scour Critical — Countermeasures Installed Fair 1982 521
CREEK Louisiana Scour Critical — Countermeasures Installed Fair 1976 517
20 ARPENT CANAL Louisiana Scour Critical — Countermeasures Installed Good 2015 516
PUSHEPATAPA CREEK Louisiana Scour Critical — Countermeasures Installed Good 1984 511

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