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
TROUT CREEK	Louisiana	Scour Critical — Countermeasures Installed	Good	1998	180
BAYOU BATON ROUGE	Louisiana	Scour Critical — Countermeasures Installed	Poor	1965	180
WESTFORK BAYOU-CANFIELD	Louisiana	Scour Critical — Countermeasures Installed	Poor	1993	180
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	178
KEPLER CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	178
CREOLE CANAL	Louisiana	Scour Critical — Countermeasures Installed	Good	2013	178
COULEE	Louisiana	Scour Critical — Countermeasures Installed	Good	2009	176
REDWINE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1977	175
TRIB. TO BLACKLAKE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1972	170
BEAR CREEK	Louisiana	Scour Critical — Countermeasures Installed	Good	1996	170
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1935	163
JOES BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1969	161
MILL CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	160
N CHENIERE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	160
KIESHE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1984	160
SAUSMAN CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1979	159
COOLEY BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Poor	1979	159
MADDEN CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1977	155
BEAR CREEK ROAD	Louisiana	Scour Critical — Countermeasures Installed	Fair	1986	150
WILLIAMS CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1977	150
BOGUE FALAYA RIVER	Louisiana	Scour Critical — Countermeasures Installed	Fair	1990	150
TAYLOR BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1960	150
IRWIN LAKE	Louisiana	Scour Critical — Countermeasures Installed	Poor	1978	150
DRAIN TO LITTLE BYU BOEU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1972	150
DRAIN TO PATTEN SLOUGH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	150
CANEY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	150
BAYOU NATCHITOCHES	Louisiana	Scour Critical — Countermeasures Installed	Fair	2000	150
HOSSTON R. RD KELLY B.	Louisiana	Scour Critical — Countermeasures Installed	Poor	1981	147
CHENIERE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1996	147
DES CANNES BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	2010	146
FLAT LICK RELIEF ELIEF	Louisiana	Scour Critical — Countermeasures Installed	Poor	1971	145
HOLDER CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1974	145
HOLDER CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1972	145
BLACK BAYOU RELIEF	Louisiana	Scour Critical — Countermeasures Installed	Poor	1974	145
BLACK BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1974	145
BLACK BAYOU RELIEF	Louisiana	Scour Critical — Countermeasures Installed	Poor	1974	145
CANEY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1971	145
CASH BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1970	145
CARRAWAY LAKE	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	143
Ivan Lake	Louisiana	Scour Critical — Countermeasures Installed	Fair	1989	140
KHVL SPRDG RD TRB.BUCHN.	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	140
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	137
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	137
CHOCTAW BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1971	136
DRAINAGE DITCH	Louisiana	Scour Critical — Countermeasures Installed	Poor	1970	136
BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	135
PRARION BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Good	1978	135
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1930	134
TRIBUTARY TO SALINE BAYO	Louisiana	Scour Critical — Countermeasures Installed	Poor	1980	130
TONEY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1987	130

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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