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
DURALD BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	2004	23
Joes Bayou	Louisiana	Scour Critical — Countermeasures Installed	Good	2022	23
LONGS CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1965	23
BOGGY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	22
GEE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1976	21
GEE CREEK RELIEF	Louisiana	Scour Critical — Countermeasures Installed	Fair	1976	21
Polly Creek	Louisiana	Scour Critical — Countermeasures Installed	Good	2024	21
FiFi Bayou Trib	Louisiana	Scour Critical — Countermeasures Installed	Good	2013	20
DUGDEMONA RIVER	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	20
CHOUDRANT CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1978	20
BAYOU BONNEIDEE	Louisiana	Scour Critical — Countermeasures Installed	Poor	1991	20
BAYOU BLACK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1977	20
BIG CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1970	20
Bayou Little	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	18
BRUSHY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	2003	17
BRANCH OF CYPRESS CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1980	16
BIG CHOCTAW BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1971	16
TAUREAU BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Good	1993	15
WILSON CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1978	15
Natalbany Creek	Louisiana	Scour Critical — Countermeasures Installed	Poor	1950	14
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1960	14
COULEE	Louisiana	Scour Critical — Countermeasures Installed	Good	2015	12
Black Bayou	Louisiana	Scour Critical — Countermeasures Installed	Good	2016	12
BLACK LAKE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1997	11
WAUKSHA BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	2012	10
LITTLE CANE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1978	10
NEW RIVER	Louisiana	Scour Critical — Countermeasures Installed	Fair	1996	10
DRAINAGE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1989	10
HORNSBY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1999	10
BLOOD RIVER	Louisiana	Scour Critical — Countermeasures Installed	Poor	1995	8
HORNSBY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	2000	6
DARBONNE NW FORK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1978	5
CONWAY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1965	5
HAZELWOOD GULLY	Louisiana	Scour Critical — Countermeasures Installed	Fair	1999	4
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1990	2
CANAL	Louisiana	Scour Critical — Countermeasures Installed	Good	2005	—
MAIN CANAL	Louisiana	Scour Critical — Countermeasures Installed	Good	2007	—
DRAIN CANAL	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	—
CITY PARK LAGOON	Louisiana	Scour Critical — Countermeasures Installed	Fair	1924	—
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Poor	1977	—
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1983	—
LITTLE BAYOU DELOUTRE	Louisiana	Scour Critical — Countermeasures Installed	Fair	1994	—
SLOUGH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1997	—
HOPE CANAL	Louisiana	Scour Critical — Countermeasures Installed	Poor	1965	—
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1960	—
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1960	—
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Good	1970	—
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1960	—
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1970	—
DUCK BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	—

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.

All Bridges Poor Condition Historic Bridges Bridge Stats