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.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| TURNBACK CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1970 | 40 |
| MID MILL CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1970 | 35 |
| TURKEY CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1950 | 35 |
| UNNAMED STR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1970 | 35 |
| LITTLE FOURCHE REN | Missouri | Scour Critical — Countermeasures Installed | Poor | 1965 | 35 |
| SAND CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1970 | 35 |
| INDIAN CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1920 | 35 |
| BEAR CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1930 | 35 |
| LIT MUDDY CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1994 | 35 |
| TRIB OF ELKHORN CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1997 | 35 |
| CLEAR CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1955 | 35 |
| ELKHORN CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1984 | 35 |
| DEER CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1978 | 35 |
| S INDIAN CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1955 | 35 |
| HURRICANE CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1950 | 35 |
| HAWKER CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1925 | 35 |
| BRUSH CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1910 | 35 |
| E FK BIG CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1985 | 35 |
| E FK BIG CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1972 | 35 |
| WOLF CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1940 | 35 |
| 3RD FK OF PLATTE R | Missouri | Scour Critical — Countermeasures Installed | Fair | 1994 | 35 |
| CASTILE CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1970 | 35 |
| ISLAND CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1984 | 35 |
| THOMPSON CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1927 | 35 |
| SAMSON CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1920 | 35 |
| MID FK CHARITON RV | Missouri | Scour Critical — Countermeasures Installed | Poor | 1925 | 35 |
| MILL CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1921 | 30 |
| WINNEGAN CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1930 | 30 |
| COLE CAMP CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1930 | 30 |
| BILLY CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1996 | 30 |
| BIG TURKEY CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1960 | 30 |
| LIT WILSON CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1900 | 30 |
| BR OF MEDICINE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1956 | 29 |
| FOURCHE RENAULT CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1960 | 25 |
| GABRIEL CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1978 | 25 |
| BRANCH OF YELLOW C | Missouri | Scour Critical — Countermeasures Installed | Poor | 1988 | 25 |
| CRIDER CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1940 | 25 |
| CRIDER CREEK | Missouri | Scour Critical — Countermeasures Installed | Poor | 1940 | 25 |
| BEAR CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1960 | 25 |
| LINCOLN CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1930 | 25 |
| MUDDY CR BR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1920 | 25 |
| PETTIS CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1982 | 25 |
| TRIB OF SUGAR CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1992 | 25 |
| CANE CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1997 | 25 |
| TRIB OF DRYWOOD CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1988 | 20 |
| CASTILE CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1975 | 20 |
| LINCOLN CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1970 | 20 |
| BR OF BRUSH CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1940 | 20 |
| YELLOW CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1904 | 20 |
| SUGAR CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1977 | 20 |
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.