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 |
|---|---|---|---|---|---|
| BR LIGHTNING CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 25 |
| TROUT CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1929 | 25 |
| SILVER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1970 | 25 |
| BR MISSOURI CR | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1950 | 25 |
| BR CRANBERRY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1910 | 25 |
| NAMEKAGON RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1928 | 24 |
| ROARING CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1940 | 24 |
| E BR BIG SANDY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1907 | 24 |
| BR BIG RIB RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1938 | 24 |
| BR RICHLAND CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1927 | 23 |
| RUBICON RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1970 | 23 |
| APPLE BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1964 | 23 |
| BR OTTER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1936 | 23 |
| BR CHERRY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1934 | 23 |
| S FK COPPER RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1920 | 23 |
| BIG SANDY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1929 | 23 |
| DEER TAIL CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1940 | 23 |
| POTATO RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2018 | 22 |
| BRULE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 22 |
| BALDWIN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1946 | 22 |
| LITTLE THORNAPPLE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1940 | 22 |
| JOHNSON CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1938 | 21 |
| BR WAUMANDEE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2022 | 20 |
| BRANCH DEVILS RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1960 | 20 |
| SCOTCH CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1962 | 20 |
| W BR RED RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1920 | 20 |
| LYGA VALLEY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1935 | 18 |
| S BR OCONTO RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1921 | 17 |
| BIG HAY MEADOW CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1936 | 15 |
| CARR VALLEY BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1990 | 15 |
| BR PLUM CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1929 | 15 |
| BIG HAY MEADOW CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1922 | 14 |
| YELLOW RIVER OVERFLOW | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 13 |
| E BR BIG SANDY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1966 | 13 |
| N FK SPIRIT RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1924 | 13 |
| SILVER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1950 | 11 |
| BR BADGER MILL CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1901 | 10 |
| GALENA RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1917 | 10 |
| BR PECATONICA RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1952 | 10 |
| DRY RUN | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1921 | 10 |
| BALDWIN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1930 | 7 |
| EVERGREEN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1916 | 6 |
| COMET CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1928 | 6 |
| OTTER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2015 | 5 |
| BRENNAN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1930 | 5 |
| SILVER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1935 | 5 |
| BOIS BRULE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1929 | 1 |
| W BR FOND DU LAC RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1927 | 1 |
| SKANAWAN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1935 | 1 |
| MENOMONEE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1976 | 1 |
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.