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 |
|---|---|---|---|---|---|
| MULLET RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1920 | 47 |
| ONION RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1935 | 47 |
| ONION RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1966 | 47 |
| SILVER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1940 | 47 |
| SILVER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1967 | 47 |
| W FK KICKAPOO RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1950 | 47 |
| BR S FK BAD AXE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1980 | 47 |
| BISHOP CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1951 | 47 |
| BR E BR ROCK RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1927 | 47 |
| WALLA WALLA CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1917 | 46 |
| MULLET RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 45 |
| SKUNK CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1941 | 45 |
| N BR PESHTIGO RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1924 | 44 |
| BR LITTLE RIB RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2020 | 44 |
| BR BLACK CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1946 | 44 |
| DREWEK CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1938 | 44 |
| DRY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1973 | 43 |
| SAND CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1913 | 42 |
| N BR MANITOWOC RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 41 |
| BR PINE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1920 | 41 |
| APPLE BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1969 | 41 |
| N CHANNEL MISSISSIPPI RI | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1916 | 40 |
| BR MILL CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1950 | 40 |
| W BR BLUE MOUNDS CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1930 | 40 |
| LAWERENCE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1924 | 40 |
| EIGHT MILE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1920 | 40 |
| LAKE POYGAN TRIB | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 40 |
| N BR OCONTO RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1913 | 40 |
| BR BURGHARDT CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1934 | 40 |
| BR NIPPERSINK CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2016 | 40 |
| NEENAH SLOUGH | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1925 | 38 |
| BEETOWN BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1950 | 37 |
| BR LITTLE EAU PLEINE R | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1970 | 36 |
| ADLER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1927 | 35 |
| N FK BAD AXE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1933 | 35 |
| N BR PESHTIGO RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1921 | 34 |
| SAND SPRING CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1945 | 33 |
| BLACK LAKE THOROUGHFARE | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1970 | 32 |
| TRIBUTARY OF MUD CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2005 | 30 |
| E FK WHITE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1934 | 30 |
| KILLSNAKE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1925 | 30 |
| EAU PLEINE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1965 | 30 |
| PORKY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1967 | 30 |
| RANDALL CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 30 |
| BR FREEMAN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1958 | 30 |
| BRUNET RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1960 | 30 |
| BR RIB RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1919 | 30 |
| CORRECTION CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1930 | 29 |
| BAD RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1975 | 25 |
| BR LIGHTNING CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1920 | 25 |
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.