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 |
|---|---|---|---|---|---|
| MULKEY CR | Missouri | Scour Critical — Unaddressed | Poor | 1900 | 40 |
| BAKER BR | Missouri | Scour Critical — Unaddressed | Poor | 1930 | 20 |
| LAKE CR | Missouri | Scour Critical — Unaddressed | Poor | 2009 | 10 |
| TRIB TO ROUBIDOUX CRK | Missouri | Scour Critical — Unaddressed | Poor | 1960 | 5 |
| NO DATA ENTERED | Missouri | Scour Critical — Countermeasures Ineffective | Good | 2024 | 10 |
| CST N LEVEE RD MISSOU | Missouri | Scour Critical — Countermeasures Installed | Fair | 1972 | 81,653 |
| MERAMEC RVR BACKWOOD DR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1954 | 74,368 |
| MERAMEC RVR SOUTH OUTER | Missouri | Scour Critical — Countermeasures Installed | Poor | 1968 | 37,539 |
| MISSISSIPPI RVR UP RR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1985 | 30,251 |
| MISSISSIPPI RVR UP RR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1990 | 30,251 |
| MISSOURI RVR UP RR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1955 | 29,666 |
| MISSOURI RVR CST MOK | Missouri | Scour Critical — Countermeasures Installed | Fair | 1991 | 28,808 |
| SNI-A-BAR CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1963 | 28,534 |
| PLATTE RVR OVRFL | Missouri | Scour Critical — Countermeasures Installed | Fair | 1959 | 26,656 |
| PLATTE RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1959 | 26,656 |
| SNI-A-BAR CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1948 | 24,233 |
| MISSOURI RVR BNSF RR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1979 | 22,278 |
| PLATTE RVR OVRFL | Missouri | Scour Critical — Countermeasures Installed | Poor | 1950 | 18,026 |
| PLATTE RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1950 | 18,026 |
| CREVE COEUR CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1968 | 15,056 |
| COUNTY RD MISSISSIPPI | Missouri | Scour Critical — Countermeasures Installed | Fair | 1975 | 13,521 |
| CUIVRE RVR CRD DYER RD | Missouri | Scour Critical — Countermeasures Installed | Fair | 1985 | 12,712 |
| NODAWAY RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1953 | 11,937 |
| MOREAU RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1967 | 11,836 |
| MOREAU RVR OVERFLO | Missouri | Scour Critical — Countermeasures Installed | Fair | 1967 | 11,836 |
| ST JOHNS DTCH | Missouri | Scour Critical — Countermeasures Installed | Fair | 1964 | 10,882 |
| DARDENNE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1974 | 10,518 |
| ST JOHNS DTCH | Missouri | Scour Critical — Countermeasures Installed | Fair | 1964 | 10,439 |
| MOREAU RVR OVERFLO | Missouri | Scour Critical — Countermeasures Installed | Good | 1969 | 10,305 |
| MOREAU RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1969 | 10,305 |
| BIG RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1977 | 9,781 |
| MOREAU RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1960 | 9,742 |
| MOREAU RVR | Missouri | Scour Critical — Countermeasures Installed | Poor | 1984 | 9,565 |
| MUSSEL FK | Missouri | Scour Critical — Countermeasures Installed | Fair | 1951 | 9,524 |
| SALINE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1970 | 9,523 |
| SALINE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1970 | 9,485 |
| NODAWAY RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1966 | 9,040 |
| MOREAU RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1978 | 9,027 |
| LITTLE GRAVOIS CR | Missouri | Scour Critical — Countermeasures Installed | Good | 1966 | 7,947 |
| LITTLE GRAVOIS CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1966 | 7,933 |
| FISHING RVR | Missouri | Scour Critical — Countermeasures Installed | Good | 1980 | 6,212 |
| 102 RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1985 | 6,207 |
| HONEY CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1972 | 6,177 |
| PORTAGE BYU | Missouri | Scour Critical — Countermeasures Installed | Fair | 1928 | 6,067 |
| DRAIN DTCH NO 1 | Missouri | Scour Critical — Countermeasures Installed | Fair | 1985 | 5,914 |
| CROOKED CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1977 | 5,858 |
| POLE CAT SLU | Missouri | Scour Critical — Countermeasures Installed | Fair | 1966 | 5,768 |
| GASCONADE RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1978 | 5,331 |
| CASTILE CR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1966 | 5,231 |
| LAMINE RVR | Missouri | Scour Critical — Countermeasures Installed | Fair | 1972 | 5,190 |
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.