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
MOON ISLAND CANAL	Louisiana	Scour Critical — Countermeasures Installed	Good	2013	73
PH RD 230 STANLEY CR.	Louisiana	Scour Critical — Countermeasures Installed	Poor	1975	72
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Good	1979	71
DARBONNE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Good	2001	70
SNAKE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1986	70
SOUTH CHENIERE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Good	2016	70
COOLEY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1995	68
POSTEN BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1971	67
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1973	67
STILLHOUSE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1976	67
GRAND BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1977	66
BAILEY TN RD TR. CORNEY	Louisiana	Scour Critical — Countermeasures Installed	Poor	1975	65
BAILEY TN RD TR CORNY B.	Louisiana	Scour Critical — Countermeasures Installed	Poor	1975	65
Martin Bayou	Louisiana	Scour Critical — Countermeasures Installed	Good	1972	63
MILLER CREEK BRIDGE	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	62
Boggs Creek Trib	Louisiana	Scour Critical — Countermeasures Installed	Poor	1979	60
WATSON BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Good	2010	60
TRIB.MILL CR.KECHI-MARSH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1984	60
GRAY BRANCH TYSON RD.	Louisiana	Scour Critical — Countermeasures Installed	Good	1982	60
SHACKLEFORD BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	60
BAYOU BOEUF	Louisiana	Scour Critical — Countermeasures Installed	Poor	1997	60
KISATCHIE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Good	1984	60
Trib To Mill Creek	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	59
Trib to Buchanan B	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	59
TRIBUTARY TO MAHLIN BAYO	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	59
GARDNER BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1981	59
JEEMS BAYOU TRIB	Louisiana	Scour Critical — Countermeasures Installed	Fair	1991	59
VIV-APT RD TRBY JAMES B.	Louisiana	Scour Critical — Countermeasures Installed	Fair	1983	59
BLACK BAYOU TRIB	Louisiana	Scour Critical — Countermeasures Installed	Good	1989	59
HORSE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1990	59
GRAY BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1988	59
TRIBUTARY TO KELLY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	59
E.FORK OF STATELINE CREE	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	59
BARDSTOWN BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1989	59
STATE LINE CREEK TRIB	Louisiana	Scour Critical — Countermeasures Installed	Fair	1990	59
CYPRESS CREEK	Louisiana	Scour Critical — Countermeasures Installed	Good	1993	59
Trib to Mill Creek	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	58
CYPRESS BAYOU TRIB	Louisiana	Scour Critical — Countermeasures Installed	Fair	1991	58
BUCHANAN BAYOU TRIB	Louisiana	Scour Critical — Countermeasures Installed	Fair	1991	58
TRIB TO CROSS BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1980	58
TETE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	58
MILL CREEK TRIB	Louisiana	Scour Critical — Countermeasures Installed	Fair	1992	57
HAYGOOD RD COTTONWOOD B	Louisiana	Scour Critical — Countermeasures Installed	Good	1992	57
ALLIGATOR BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1992	57
WALLACE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1966	55
EDWARDS MILL CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1993	50
Flat Rivers Ditch	Louisiana	Scour Critical — Countermeasures Installed	Poor	1988	50
Lil Cypress Bayou	Louisiana	Scour Critical — Countermeasures Installed	Fair	1994	50
Caney Creek	Louisiana	Scour Critical — Countermeasures Installed	Good	1990	50
Boggs Creek	Louisiana	Scour Critical — Countermeasures Installed	Poor	1990	50

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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