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 E BR PECATONICA RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1948 | 380 |
| BR N FK BAD AXE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1931 | 379 |
| FALL CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1940 | 367 |
| LOWES CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1955 | 367 |
| LITTLE WOLF RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1967 | 365 |
| W BR FOND DU LAC RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1912 | 360 |
| MCCLINTOCK CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1936 | 352 |
| BLUE MOUNDS BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1922 | 352 |
| PIGEON RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1942 | 352 |
| E BR BLACK RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1953 | 350 |
| TIMBER COULEE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1960 | 336 |
| BR BUFFALO RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1926 | 336 |
| BR SPRING BROOK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1967 | 331 |
| MINK CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1922 | 330 |
| MOOSE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1934 | 325 |
| BAIRD CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1970 | 323 |
| PRATT CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1957 | 316 |
| VERMONT CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1958 | 314 |
| BRAEZELS BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1957 | 313 |
| LAKE WINNEBAGO TRIB | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1925 | 307 |
| FOREMAN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1932 | 306 |
| RED RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1961 | 305 |
| KELLY BROOK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1969 | 301 |
| BR ROCKY RUN | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1968 | 300 |
| ONION RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1931 | 300 |
| BR SHERMAN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1925 | 294 |
| BLACK RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1975 | 293 |
| ELLIS BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1930 | 293 |
| ELK CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1964 | 293 |
| DEAD CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1962 | 293 |
| TURTLE CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1965 | 293 |
| SYLVESTER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1935 | 290 |
| SQUAW CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1920 | 283 |
| BR SEYMOUR CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1950 | 282 |
| BR AMES BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1966 | 282 |
| AMES BRANCH | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1966 | 282 |
| BR PECATONICA RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1966 | 276 |
| BR SODA CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 1920 | 272 |
| CROOKED CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1924 | 270 |
| BEARGRASS CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1925 | 265 |
| BR EAU CLAIRE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1925 | 265 |
| OTTER CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1945 | 265 |
| YELLOWSTONE RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1968 | 264 |
| BEARGRASS CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1925 | 262 |
| BEAR GRASS CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1956 | 258 |
| BR GRAND RIVER | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1924 | 250 |
| SPRING VALLEY CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Good | 2021 | 250 |
| DUTCH CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1978 | 250 |
| SPRING BROOK | Wisconsin | Scour Critical — Countermeasures Installed | Fair | 1966 | 248 |
| BIG CAIN CREEK | Wisconsin | Scour Critical — Countermeasures Installed | Poor | 1965 | 248 |
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.