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Scour Critical Bridges in Minnesota

257 bridges in Minnesota 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 257 bridges in Minnesota have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
LITTLE COTTONWOOD RIVER Minnesota Scour Critical — Countermeasures Installed Good 1977 300
LITTLE ROCK RIVER Minnesota Scour Critical — Countermeasures Installed Good 1930 295
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1963 295
COTTONWOOD RIVER Minnesota Scour Critical — Countermeasures Installed Poor 1959 295
SPUNK CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1940 280
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1940 270
MISSISSIPPI RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1979 265
CLEARWATER RIVER Minnesota Scour Critical — Countermeasures Installed Good 1978 260
S FK YELLOW BANK RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1962 255
S FK WATONWAN RIVER Minnesota Scour Critical — Countermeasures Installed Good 1978 255
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1963 251
S FK WATONWAN RIVER Minnesota Scour Critical — Countermeasures Installed Good 1977 245
BLUE EARTH RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1956 236
SHAKOPEE CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1968 235
DITCH Minnesota Scour Critical — Countermeasures Installed Poor 1958 235
RAVEN STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1964 225
MIDDLE RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1972 220
MINNESOTA RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1949 206
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1967 195
ELK CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1965 185
ELK CREEK Minnesota Scour Critical — Countermeasures Installed Poor 1966 185
BIG COBB RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1972 176
KANARANZI CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1964 165
MIDDLE RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1970 160
MORGAN CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1972 154
CANNON RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1909 150
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1953 135
WATONWAN RIVER Minnesota Scour Critical — Countermeasures Installed Good 1979 135
LILY CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1972 128
MOUND CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1969 127
PERCH CREEK Minnesota Scour Critical — Countermeasures Installed Poor 1955 125
DITCH Minnesota Scour Critical — Countermeasures Installed Fair 1941 120
HAWK CREEK Minnesota Scour Critical — Countermeasures Installed Poor 1963 119
ELM CREEK Minnesota Scour Critical — Countermeasures Installed Good 1981 115
HAWK CREEK Minnesota Scour Critical — Countermeasures Installed Good 1971 113
SPLIT ROCK CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1973 105
CR.107 OVER ELM CREEK Minnesota Scour Critical — Countermeasures Installed Poor 1975 99
HAWK CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1972 95
BUFFALO CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1969 95
JACK CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1977 95
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1910 86
CHIPPEWA RIVER Minnesota Scour Critical — Countermeasures Installed Fair 1971 85
PINE CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1959 75
CAMP CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1936 75
STREAM Minnesota Scour Critical — Countermeasures Installed Fair 1940 75
SPRING VALLEY CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1977 72
SLEEPY EYE CREEK Minnesota Scour Critical — Countermeasures Installed Good 1996 71
CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1964 70
STREAM Minnesota Scour Critical — Countermeasures Installed Poor 1911 68
WHALAN CREEK Minnesota Scour Critical — Countermeasures Installed Fair 1953 65

Scour Critical Rating Codes

Code 2 — UnaddressedBridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures InstalledProtective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures IneffectiveProtective 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.

All Bridges Poor Condition Historic Bridges Bridge Stats