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Scour Critical Bridges in Virginia

8 bridges in Virginia 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 8 bridges in Virginia have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
DISMAL SWAMP CANAL Virginia Scour Critical — Countermeasures Installed Poor 1934 35,000
CHOPAWAMSIC CREEK Virginia Scour Critical — Countermeasures Installed Poor 1933 20,738
AQUIA CREEK Virginia Scour Critical — Countermeasures Installed Fair 1957 15,728
A & C CANAL Virginia Scour Critical — Countermeasures Installed Poor 1951 11,000
AUSTIN RUN Virginia Scour Critical — Countermeasures Installed Fair 1933 9,070
SMITH CREEK Virginia Scour Critical — Countermeasures Installed Poor 1972 200
NORTH MEHERRIN RIVER Virginia Scour Critical — Countermeasures Installed Fair 1950 83
NICHOLAS CREEK Virginia Scour Critical — Countermeasures Installed Fair 2017 10

Scour Critical Rating Codes

Code 2 — UnaddressedBridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures InstalledProtective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures IneffectiveProtective 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