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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
CROW RIVER Minnesota Scour Critical — Unaddressed Fair 1973 4,800
ELM CREEK Minnesota Scour Critical — Unaddressed Poor 1977 1,456
N FK CROW RIVER Minnesota Scour Critical — Unaddressed Fair 1963 1,200
ELM CREEK Minnesota Scour Critical — Unaddressed Poor 1966 1,153
ANN RIVER Minnesota Scour Critical — Unaddressed Fair 1969 1,100
SAND CREEK Minnesota Scour Critical — Unaddressed Fair 1967 680
S FK CROW RIVER Minnesota Scour Critical — Unaddressed Fair 1973 657
CROW WING RIVER Minnesota Scour Critical — Unaddressed Poor 1958 643
WASHINGTON CREEK Minnesota Scour Critical — Unaddressed Fair 1962 610
ELM CREEK Minnesota Scour Critical — Unaddressed Poor 1964 530
N FK YELLOW BANK RIVER Minnesota Scour Critical — Unaddressed Fair 1975 520
TUTTLE LAKE OUTLET Minnesota Scour Critical — Unaddressed Poor 1959 480
MINNESOTA RIVER Minnesota Scour Critical — Unaddressed Fair 1948 460
S FK CROW RIVER Minnesota Scour Critical — Unaddressed Fair 1963 460
STREAM Minnesota Scour Critical — Unaddressed Fair 1963 445
SOUTH CREEK Minnesota Scour Critical — Unaddressed Poor 1971 435
OTTER TAIL RIVER Minnesota Scour Critical — Unaddressed Fair 1967 390
MUD CREEK Minnesota Scour Critical — Unaddressed Fair 1969 360
RED EYE RIVER Minnesota Scour Critical — Unaddressed Poor 1965 325
N FK CROW RIVER Minnesota Scour Critical — Unaddressed Fair 1980 310
S BR YELLOW MEDICINE R Minnesota Scour Critical — Unaddressed Good 1970 295
CROW WING RIVER Minnesota Scour Critical — Unaddressed Fair 1967 276
CANNON RIVER Minnesota Scour Critical — Unaddressed Fair 1975 276
WATONWAN RIVER Minnesota Scour Critical — Unaddressed Fair 1983 276
BEAVER CREEK Minnesota Scour Critical — Unaddressed Poor 1965 225
HAWK CREEK Minnesota Scour Critical — Unaddressed Poor 1959 150
STONY RIVER Minnesota Scour Critical — Unaddressed Poor 1972 137
ELM CREEK Minnesota Scour Critical — Unaddressed Poor 1965 128
CO DITCH # 3 Minnesota Scour Critical — Unaddressed Poor 1974 105
E FK DES MOINES RIVER Minnesota Scour Critical — Unaddressed Poor 1972 100
S FK GROUNDHOUSE RIVER Minnesota Scour Critical — Unaddressed Fair 1968 90
E FK DES MOINES RIVER Minnesota Scour Critical — Unaddressed Poor 1977 77
S BR YELLOW MEDICINE R Minnesota Scour Critical — Unaddressed Fair 1967 65
CLEARWATER RIVER Minnesota Scour Critical — Unaddressed Fair 1935 59
SHELL RIVER Minnesota Scour Critical — Unaddressed Fair 1984 45
MOSQUITO CREEK Minnesota Scour Critical — Unaddressed Poor 1937 35
S BR YELLOW MEDICINE R Minnesota Scour Critical — Unaddressed Good 1980 33
BIG COTTONWOOD RIVER Minnesota Scour Critical — Unaddressed Fair 1974 21
MINNEHAHA CREEK Minnesota Scour Critical — Countermeasures Ineffective Good 2021 4,700
CHIPPEWA RIVER Minnesota Scour Critical — Countermeasures Ineffective Fair 2023 1,427
TWIN LAKES CREEK Minnesota Scour Critical — Countermeasures Ineffective Good 2022 1,213
VALLEY CREEK Minnesota Scour Critical — Countermeasures Ineffective Poor 1924 268
South Fork Zumbro River Minnesota Scour Critical — Countermeasures Ineffective Poor 1895 75
N. BR. WHITEFACE RIVER Minnesota Scour Critical — Countermeasures Ineffective Poor 1967 30
SWAN RIVER Minnesota Scour Critical — Countermeasures Ineffective Poor 1917 25
CANNON RIVER Minnesota Scour Critical — Countermeasures Ineffective Poor 1921 20
RABBIT RIVER Minnesota Scour Critical — Countermeasures Ineffective Poor 1920 20
N FK ZUMBRO RIVER Minnesota Scour Critical — Countermeasures Ineffective Poor 1920 20
NOKASIPPI RIVER Minnesota Scour Critical — Countermeasures Ineffective Poor 1908 20
N BR TWO RIVERS Minnesota Scour Critical — Countermeasures Ineffective Poor 1907 12

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