Scour Critical Bridges in New York
864 bridges in New York 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 864 bridges in New York have been identified as vulnerable to scour damage.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| WEST BRANCH BEER KILL | New York | Scour Critical — Countermeasures Installed | Poor | 1965 | — |
| ROUND LAKE OUTLET | New York | Scour Critical — Countermeasures Installed | Poor | 1995 | — |
| Wiccopee Creek | New York | Scour Critical — Countermeasures Installed | Good | 2021 | — |
| Quassaic Creek | New York | Scour Critical — Countermeasures Installed | Poor | 1953 | — |
| CATSKILL CREEK | New York | Scour Critical — Countermeasures Installed | Fair | 1999 | — |
| NORTH CREEK | New York | Scour Critical — Countermeasures Installed | Fair | 1940 | — |
| ENGLISH RIVER | New York | Scour Critical — Countermeasures Installed | Poor | 1975 | — |
| CROSS RIVER | New York | Scour Critical — Countermeasures Installed | Fair | 1950 | — |
| SUGARLOAF BROOK | New York | Scour Critical — Countermeasures Installed | Poor | 1970 | — |
| JACKSON BROOK | New York | Scour Critical — Countermeasures Installed | Poor | 1930 | — |
| Mamaroneck River | New York | Scour Critical — Countermeasures Installed | Fair | 1980 | — |
| CONNETQUOT BROOK | New York | Scour Critical — Countermeasures Installed | Poor | 1900 | — |
| BANNISTER CREEK | New York | Scour Critical — Countermeasures Installed | Fair | 1952 | — |
| W B OSWEGATCHIE R | New York | Scour Critical — Countermeasures Installed | Fair | 1945 | — |
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.