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
STOWE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1979	2,230
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	2,230
DARBONNE BAYOU RELIEF	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	2,216
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1948	2,216
DARBONNE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1975	2,216
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1950	2,211
BAYOU LACOMBE	Louisiana	Scour Critical — Countermeasures Installed	Fair	1955	2,206
Gum Creek	Louisiana	Scour Critical — Countermeasures Installed	Fair	1955	2,206
PINE POINT GULLY	Louisiana	Scour Critical — Countermeasures Installed	Fair	1970	2,203
71ST STREET DITCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1956	2,200
BOEUF RIVER	Louisiana	Scour Critical — Countermeasures Installed	Fair	1978	2,159
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1968	2,151
BAYOU CARRON	Louisiana	Scour Critical — Countermeasures Installed	Fair	1962	2,097
LAWRENCE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1972	2,087
COPPER MILL BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1970	2,080
BECKWITH CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1961	2,079
BAYOU RIGOLETTE	Louisiana	Scour Critical — Countermeasures Installed	Poor	1950	2,063
PRAIRIE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	2,060
HALFWAY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	2,060
BOGUE CHITTO RIVER	Louisiana	Scour Critical — Countermeasures Installed	Fair	1970	2,058
FRAZIER CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1958	2,048
BRUSHEY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1981	2,036
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1981	2,036
BEAVER BRANCH&CYPRESS CR	Louisiana	Scour Critical — Countermeasures Installed	Good	1981	2,020
BAYOU PIERRE	Louisiana	Scour Critical — Countermeasures Installed	Poor	1955	2,013
DUNCAN CANAL	Louisiana	Scour Critical — Countermeasures Installed	Good	2005	2,000
CANAL	Louisiana	Scour Critical — Countermeasures Installed	Fair	1977	2,000
L.BOGUE FALAYA	Louisiana	Scour Critical — Countermeasures Installed	Good	1960	2,000
CHOCTAW CREEK	Louisiana	Scour Critical — Countermeasures Installed	Good	1980	1,988
DRY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	1,988
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	1,988
SALINE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1979	1,988
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	1,988
BAYOU PIERRE	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	1,988
WATSON BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1978	1,975
FLAT RIVER	Louisiana	Scour Critical — Countermeasures Installed	Poor	1981	1,951
RED CHUTE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1983	1,951
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Poor	1968	1,947
OFF RAMP TO ACADIAN THRU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1964	1,946
MIM SPRINGS	Louisiana	Scour Critical — Countermeasures Installed	Fair	1974	1,933
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Poor	1971	1,933
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1973	1,932
CALCASIEU RIVER TRIBUTAR	Louisiana	Scour Critical — Countermeasures Installed	Poor	1973	1,932
CALCASIEU RIVER	Louisiana	Scour Critical — Countermeasures Installed	Poor	1973	1,932
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1978	1,931
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1968	1,931
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1968	1,931
I-49	Louisiana	Scour Critical — Countermeasures Installed	Fair	1986	1,930
CANEY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1972	1,913
BOEUF RIVER	Louisiana	Scour Critical — Countermeasures Installed	Poor	1966	1,913

Scour Critical Rating Codes

Code 2 — Unaddressed	Bridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures Installed	Protective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures Ineffective	Protective 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.

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