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Scour Critical Bridges in Michigan

1,081 bridges in Michigan 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 1,081 bridges in Michigan have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
NORTH BR. FLINT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1928 1,322
MISTEGUAY CREEK Michigan Scour Critical — Countermeasures Installed Fair 1944 1,320
SLAGLE CREEK Michigan Scour Critical — Countermeasures Installed Fair 1954 1,318
QUANICASSEE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1968 1,305
S BR IRON RIVER Michigan Scour Critical — Countermeasures Installed Good 1934 1,300
WOLF CREEK Michigan Scour Critical — Countermeasures Installed Good 1935 1,276
NORTH MACON CREEK Michigan Scour Critical — Countermeasures Installed Poor 1929 1,250
SWAN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1987 1,230
HOLLY DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1965 1,209
PINE RIVER Michigan Scour Critical — Countermeasures Installed Poor 1947 1,190
SALINE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1966 1,180
LITTLE PRESQUE ISLE RIV Michigan Scour Critical — Countermeasures Installed Fair 1936 1,177
MINERAL RIVER Michigan Scour Critical — Countermeasures Installed Fair 1939 1,175
NELSON CREEK Michigan Scour Critical — Countermeasures Installed Fair 1953 1,175
INDIAN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1949 1,173
THREAD RIVER Michigan Scour Critical — Countermeasures Installed Fair 1934 1,163
TAHQUAMENON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1978 1,162
THORNAPPLE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1960 1,150
MIDDLE BR ESCANABA RIVER Michigan Scour Critical — Countermeasures Installed Fair 1985 1,146
WARNER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1984 1,146
N BRANCH KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Poor 1929 1,140
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1958 1,130
BALTIMORE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1934 1,122
BELLE RIVER DRAIN Michigan Scour Critical — Countermeasures Installed Good 1985 1,120
MESSMORE AND CRONK DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1986 1,112
BAD RIVER Michigan Scour Critical — Countermeasures Installed Fair 1969 1,105
BEAVER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1954 1,102
LIBHART CREEK Michigan Scour Critical — Countermeasures Installed Poor 1936 1,093
OCHA CREEK Michigan Scour Critical — Countermeasures Installed Fair 1953 1,091
S BR PAINT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1939 1,090
AU GRES RIVER Michigan Scour Critical — Countermeasures Installed Fair 1975 1,090
PINE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1979 1,074
GUN RIVER Michigan Scour Critical — Countermeasures Installed Fair 1958 1,073
E BR GALIEN RIVER Michigan Scour Critical — Countermeasures Installed Poor 1941 1,051
STONY CREEK Michigan Scour Critical — Countermeasures Installed Fair 1929 1,047
E BR NET RIVER Michigan Scour Critical — Countermeasures Installed Fair 1961 1,046
LITTLE CRANBERRY RIVER Michigan Scour Critical — Countermeasures Installed Fair 1948 1,032
BIRCH RUN CREEK Michigan Scour Critical — Countermeasures Installed Poor 1936 1,027
BEAR CREEK Michigan Scour Critical — Countermeasures Installed Poor 1925 1,026
BEAVER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1950 1,025
S BR CASS RIVER I/C DRN Michigan Scour Critical — Countermeasures Installed Fair 1930 1,023
BEAR CREEK DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1984 1,020
LITTLE RABBIT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1978 1,015
CARP RIVER Michigan Scour Critical — Countermeasures Installed Fair 1934 1,004
U OF M LAKE DRAIN Michigan Scour Critical — Countermeasures Installed Good 1990 1,003
N BR PENTWATER RIVER Michigan Scour Critical — Countermeasures Installed Fair 1953 1,000
NORTH SHADE DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1950 1,000
PINE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1955 1,000
WOOLACE MARTN WALTERS DR Michigan Scour Critical — Countermeasures Installed Poor 1936 976
OTTER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1935 965

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