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Scour Critical Bridges in Missouri

312 bridges in Missouri 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 312 bridges in Missouri have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
TOMBSTONE CR Missouri Scour Critical — Countermeasures Installed Poor 1929 5
MID BR OF SQUAW CR Missouri Scour Critical — Countermeasures Installed Poor 1930 5
MUDDY CR Missouri Scour Critical — Countermeasures Installed Poor 1910 5
BR LIT MEDICINE CR Missouri Scour Critical — Countermeasures Installed Poor 1940 5
BRUSH CR Missouri Scour Critical — Countermeasures Installed Poor 1900 5
LITTLE CR Missouri Scour Critical — Countermeasures Installed Poor 1984 5
OWL CR Missouri Scour Critical — Countermeasures Installed Poor 1910 5
BR MEDICINE CR Missouri Scour Critical — Countermeasures Installed Poor 1950 5
THOMPSON RVR TRIB Missouri Scour Critical — Countermeasures Installed Poor 1986 5
TRIB OF BIG CR Missouri Scour Critical — Countermeasures Installed Poor 1930 5
BR OF SUGAR CR Missouri Scour Critical — Countermeasures Installed Poor 1935 5
E HONEY CR Missouri Scour Critical — Countermeasures Installed Poor 2003 5

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