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
BAYOU DELOUTRE	Louisiana	Scour Critical — Countermeasures Installed	Good	1996	1,907
INDIAN BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1977	1,900
BUTTON CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	1,870
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	1,870
ABITA RIVER	Louisiana	Scour Critical — Countermeasures Installed	Poor	1957	1,844
BAYOU TIGRE	Louisiana	Scour Critical — Countermeasures Installed	Good	2010	1,832
BEAVER BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	1,812
BAYOU PORTAGE	Louisiana	Scour Critical — Countermeasures Installed	Fair	1961	1,807
DRY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1947	1,806
BAYOU DE CANNES	Louisiana	Scour Critical — Countermeasures Installed	Fair	1963	1,790
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1963	1,790
BLOOD RIVER	Louisiana	Scour Critical — Countermeasures Installed	Fair	1961	1,783
GLASS BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	1,781
GLASS BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1960	1,781
GLASS BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Poor	1958	1,781
BRUSHY BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	1974	1,770
TANG RIVER RELIEF	Louisiana	Scour Critical — Countermeasures Installed	Fair	1963	1,762
CYPRESS CREEK RELIEF	Louisiana	Scour Critical — Countermeasures Installed	Fair	1982	1,757
LEONARD BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Poor	1966	1,754
LITTLE BAYOU TECHE	Louisiana	Scour Critical — Countermeasures Installed	Poor	1971	1,741
DRAINAGE CANAL	Louisiana	Scour Critical — Countermeasures Installed	Fair	1974	1,741
TWELVE MILE CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1958	1,730
BLOOD RIVER	Louisiana	Scour Critical — Countermeasures Installed	Fair	1961	1,730
DRAINAGE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	1,727
BORROW PIT CANAL	Louisiana	Scour Critical — Countermeasures Installed	Fair	1979	1,716
WINN CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1950	1,715
REDWOOD CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1958	1,710
Black Creek	Louisiana	Scour Critical — Countermeasures Installed	Fair	1963	1,710
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1949	1,706
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1949	1,706
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1949	1,706
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1952	1,706
DRAIN	Louisiana	Scour Critical — Countermeasures Installed	Fair	1949	1,706
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1956	1,700
PARMER CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1956	1,700
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1959	1,692
CHEVREUILLE B.	Louisiana	Scour Critical — Countermeasures Installed	Poor	1956	1,691
BRUSHY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1966	1,689
ARD CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1960	1,680
CHOUPIQUE BAYOU	Louisiana	Scour Critical — Countermeasures Installed	Fair	2007	1,663
LITTLE SILVER CR	Louisiana	Scour Critical — Countermeasures Installed	Fair	1961	1,648
WILSON CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1961	1,648
CANEY CREEK	Louisiana	Scour Critical — Countermeasures Installed	Poor	1970	1,645
LINCOLN MEMORIAL DITCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1994	1,644
HEMPHILL CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1966	1,622
BEAVER BRANCH	Louisiana	Scour Critical — Countermeasures Installed	Fair	1975	1,619
BAYOU JONAS	Louisiana	Scour Critical — Countermeasures Installed	Poor	1979	1,617
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1971	1,605
CREEK	Louisiana	Scour Critical — Countermeasures Installed	Fair	1950	1,599
Nezpique Bayou E. Fork	Louisiana	Scour Critical — Countermeasures Installed	Poor	1950	1,599

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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