Scour Critical Bridges in Wisconsin
751 bridges in Wisconsin 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 751 bridges in Wisconsin have been identified as vulnerable to scour damage.
| Bridge | State | Scour Status | Condition | Year Built | ADT |
|---|---|---|---|---|---|
| OTTER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1964 | 1,461 |
| MEEME RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1932 | 1,400 |
| BR CEDAR CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1956 | 1,391 |
| YELLOW RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1972 | 1,300 |
| MCCASLIN BROOK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1938 | 1,200 |
| SPRING CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 1,175 |
| PINE RIVER WATERSHED | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1992 | 1,125 |
| LITTLE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1923 | 1,100 |
| N BR PIKE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1931 | 1,100 |
| MILLER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1958 | 1,100 |
| HONEY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1977 | 1,100 |
| HELEN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1941 | 1,087 |
| CHAIN ECHO CHANNEL | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1976 | 1,074 |
| MULLET RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1936 | 1,040 |
| SORENSON CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2005 | 1,000 |
| E BR FOND DU LAC RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1982 | 1,000 |
| LITTLE OTTER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1935 | 975 |
| FISHERMAN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1952 | 940 |
| OCONOMOWOC RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1964 | 940 |
| FURNACE BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1965 | 940 |
| BEARPEN COULEE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 925 |
| BARK RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 910 |
| CASTLE ROCK FLOWAGE | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1982 | 904 |
| BUTLER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1949 | 880 |
| LAU CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1923 | 880 |
| HONEY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1933 | 860 |
| BR HONEY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1953 | 860 |
| PRATT CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1925 | 822 |
| GRAND RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1975 | 820 |
| N BR MILWAUKEE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1951 | 799 |
| SCHOOLHOUSE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1929 | 793 |
| DODGE BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 790 |
| NEBAGAMON CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1969 | 790 |
| MULLET RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 790 |
| CLEAR CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1957 | 770 |
| BEAVER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1968 | 763 |
| CATTAIL VALLEY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2020 | 750 |
| N BR MILWAUKEE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1978 | 750 |
| EIGHT MILE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1954 | 730 |
| WAPOGASSET BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 720 |
| S FK HAY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1938 | 719 |
| LITTLE EAU PLEINE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2020 | 672 |
| DES PLAINES RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1950 | 650 |
| MILL CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 650 |
| BR COON CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1927 | 650 |
| DE NEVEU CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1926 | 650 |
| RHEINGAN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2020 | 640 |
| DUTCH GAP CANAL | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1960 | 640 |
| PINE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1900 | 640 |
| BR BIG RIB RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1938 | 634 |
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.