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 |
|---|---|---|---|---|---|
| MID FK CHARITON RV | Missouri | Scour Critical — Countermeasures Installed | Fair | 1956 | 5,085 |
| MUDDY CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1964 | 4,743 |
| MUDDY CR | Missouri | Scour Critical — Countermeasures Installed | Good | 1977 | 4,734 |
| BLACKWELL CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1964 | 4,527 |
| RAMSEY CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1930 | 4,514 |
| MOREAU RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1974 | 4,478 |
| BLACKWELL CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1964 | 4,457 |
| WOLF CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1946 | 4,191 |
| BR WOLF CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1946 | 4,191 |
| NO CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1977 | 4,053 |
| GRAND RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1965 | 3,860 |
| HORSE ISLAND CHUTE | Missouri | Scour Critical — Countermeasures Installed | Poor | 1942 | 3,806 |
| KASKASKIA ST MISSISSI | Missouri | Scour Critical — Countermeasures Installed | Poor | 1942 | 3,806 |
| HONEY CR DRAIN DTC | Missouri | Scour Critical — Countermeasures Installed | Fair | 1973 | 3,670 |
| FIRE PRAIRIE CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1984 | 3,602 |
| CLARK CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1965 | 3,308 |
| OSAGE RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1964 | 3,285 |
| SANDY CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1940 | 3,266 |
| GASCONADE RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,822 |
| HUBBLE CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1936 | 2,729 |
| HUBBLE CR OVRFL | Missouri | Scour Critical — Countermeasures Installed | Poor | 1936 | 2,729 |
| GASCONADE RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1979 | 2,422 |
| ROUBIDOUX CR | Missouri | Scour Critical — Countermeasures Installed | Good | 2004 | 2,400 |
| MISSOURI RVR ABANDONED | Missouri | Scour Critical — Countermeasures Installed | Poor | 1938 | 2,100 |
| CLARKS FORK CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1990 | 1,949 |
| GRAND RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1987 | 1,938 |
| WELDON FK OF GRAND | Missouri | Scour Critical — Countermeasures Installed | Fair | 1971 | 1,917 |
| WHITEWATER RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1958 | 1,914 |
| MOUND CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1933 | 1,892 |
| TUQUE & WOLF CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1958 | 1,836 |
| MONTGOMERY BR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1969 | 1,700 |
| LOCUST CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1969 | 1,700 |
| FOURCHE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1970 | 1,583 |
| SMITH BR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1958 | 1,564 |
| N FK MUD CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1959 | 1,529 |
| GOODWIN RVR BR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1922 | 1,389 |
| PINEY CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1925 | 1,346 |
| APPLE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1955 | 1,265 |
| GOODWATER BR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1930 | 1,259 |
| MILL CR | Missouri | Scour Critical — Countermeasures Installed | Good | 1991 | 1,230 |
| BARKER CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1947 | 1,120 |
| BIG PINEY RIVER | Missouri | Scour Critical — Countermeasures Installed | Good | 1941 | 1,105 |
| MISSOURI RVR | Missouri | Scour Critical — Countermeasures Installed | Good | 1939 | 1,096 |
| DRAIN DTCH #3 | Missouri | Scour Critical — Countermeasures Installed | Fair | 1969 | 1,095 |
| HARRIS CR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1933 | 1,033 |
| S GRAND RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1968 | 1,021 |
| PUZZLE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1929 | 1,021 |
| MONITEAU CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1989 | 1,013 |
| DRAIN DTCH #3 | Missouri | Scour Critical — Countermeasures Installed | Fair | 1977 | 1,012 |
| BENNETT SPR BR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1900 | 1,000 |
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.