Scour Critical Bridges in Michigan
1,081 bridges in Michigan 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 1,081 bridges in Michigan have been identified as vulnerable to scour damage.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| STONYCREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1926 | 146 |
| AUGRES RIVER | Michigan | Scour Critical — Countermeasures Installed | Fair | 1925 | 145 |
| ALDER CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1926 | 143 |
| CHICAGON CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1900 | 142 |
| PAINT CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1984 | 142 |
| SUCKER CREEK DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1965 | 140 |
| TROUT FALLS CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1938 | 140 |
| JONES CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1962 | 139 |
| MILL CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1944 | 139 |
| LOST CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1920 | 138 |
| SALMON - TROUT RIVER | Michigan | Scour Critical — Countermeasures Installed | Poor | 1947 | 137 |
| E BR STURGEON RIVER | Michigan | Scour Critical — Countermeasures Installed | Poor | 1945 | 135 |
| PORTER CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1938 | 135 |
| MAPLE RIVER | Michigan | Scour Critical — Countermeasures Installed | Poor | 1986 | 133 |
| U OF M LAKE DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1990 | 133 |
| PAINT RIVER | Michigan | Scour Critical — Countermeasures Installed | Poor | 1962 | 133 |
| TUTTLEVILLE DRAIN | Michigan | Scour Critical — Countermeasures Installed | Good | 1980 | 133 |
| STONY CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1920 | 132 |
| SHAD CREEK DRAIN | Michigan | Scour Critical — Countermeasures Installed | Good | 1981 | 132 |
| ST JOSEPH RIVER | Michigan | Scour Critical — Countermeasures Installed | Good | 1987 | 130 |
| PIGEON RIVER | Michigan | Scour Critical — Countermeasures Installed | Fair | 1980 | 130 |
| HALE CREEK | Michigan | Scour Critical — Countermeasures Installed | Good | 1952 | 130 |
| FORTUNE CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1921 | 130 |
| LOCKWOOD DRAIN | Michigan | Scour Critical — Countermeasures Installed | Poor | 1930 | 130 |
| BUSH CREEK DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1978 | 129 |
| MILL CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1974 | 129 |
| NORTH SHADE DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1977 | 126 |
| NORTH SHADE DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1981 | 126 |
| BULLOCK CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1988 | 125 |
| WERNERS CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1925 | 124 |
| HUBER CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1925 | 124 |
| LITTLE MUSKEGON RIVER | Michigan | Scour Critical — Countermeasures Installed | Fair | 1987 | 124 |
| NORTH BR CHIPPEWA RIVER | Michigan | Scour Critical — Countermeasures Installed | Poor | 1937 | 123 |
| FLAT RIVER | Michigan | Scour Critical — Countermeasures Installed | Fair | 1871 | 122 |
| CONSTANT DURUSSEL DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1948 | 121 |
| DRAIN #115 | Michigan | Scour Critical — Countermeasures Installed | Fair | 1978 | 121 |
| RABBIT RIVER | Michigan | Scour Critical — Countermeasures Installed | Good | 1982 | 120 |
| BIRD CREEK DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1983 | 120 |
| E BR PINNEBOG RIVER | Michigan | Scour Critical — Countermeasures Installed | Fair | 1979 | 120 |
| BAD AXE DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1986 | 120 |
| SOUTH BR WHITE CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1971 | 120 |
| JOHNSON CREEK | Michigan | Scour Critical — Countermeasures Installed | Fair | 1978 | 120 |
| RAISIN RIVER | Michigan | Scour Critical — Countermeasures Installed | Poor | 1942 | 120 |
| S FORK OF HAYWORTH | Michigan | Scour Critical — Countermeasures Installed | Poor | 1890 | 119 |
| BEAVER CREEK DRAIN | Michigan | Scour Critical — Countermeasures Installed | Poor | 1941 | 118 |
| NORTH SHADE DRAIN | Michigan | Scour Critical — Countermeasures Installed | Fair | 1978 | 118 |
| DRAIN #115 | Michigan | Scour Critical — Countermeasures Installed | Fair | 1978 | 117 |
| BIG BAIRD CREEK | Michigan | Scour Critical — Countermeasures Installed | Poor | 1957 | 116 |
| WISCOGGIN DAIRN | Michigan | Scour Critical — Countermeasures Installed | Good | 1986 | 115 |
| SHAD CREEK DRAIN | Michigan | Scour Critical — Countermeasures Installed | Good | 1978 | 111 |
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.