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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
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Poor 1955 16,125
S BR PAW PAW RIVER Michigan Scour Critical — Countermeasures Installed Fair 1960 15,986
S BR PAW PAW RIVER Michigan Scour Critical — Countermeasures Installed Fair 1960 15,986
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Poor 1915 15,940
FLINT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1926 15,881
HICKORY CREEK Michigan Scour Critical — Countermeasures Installed Good 1969 15,600
FRANK & POET DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1958 15,575
FRANK & POET DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1958 15,575
CLINTON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1959 15,351
FLINT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1967 15,328
RABBIT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1957 15,300
BATTLE CREEK RIVER Michigan Scour Critical — Countermeasures Installed Fair 1966 15,300
RAILROAD DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1950 15,061
FRANK & POET DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1936 14,984
GRAND RIVER & MARKET ST Michigan Scour Critical — Countermeasures Installed Fair 1959 14,899
GRAND RIVER & MARKET RD Michigan Scour Critical — Countermeasures Installed Fair 1959 14,899
RED RUN DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1985 14,852
FELLOWS CREEK Michigan Scour Critical — Countermeasures Installed Poor 1930 14,842
ECORSE CREEK Michigan Scour Critical — Countermeasures Installed Fair 1977 14,820
PINE RUN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1915 14,723
GUN RIVER Michigan Scour Critical — Countermeasures Installed Fair 1960 14,700
GUN RIVER Michigan Scour Critical — Countermeasures Installed Fair 1960 14,700
THREAD RIVER Michigan Scour Critical — Countermeasures Installed Fair 1995 14,407
WEBB DRAIN Michigan Scour Critical — Countermeasures Installed Good 1961 14,378
WEBB DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1961 14,378
BLACK RIVER Michigan Scour Critical — Countermeasures Installed Fair 1955 14,315
BLACK RIVER Michigan Scour Critical — Countermeasures Installed Fair 1930 14,315
CHIPPEWA RIVER Michigan Scour Critical — Countermeasures Installed Fair 1940 14,220
RED CEDAR RIVER Michigan Scour Critical — Countermeasures Installed Poor 1924 13,900
SHIAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1961 13,840
SHIAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1961 13,840
FLINT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1974 13,821
FORD RIVER Michigan Scour Critical — Countermeasures Installed Fair 1941 13,600
BR OF BLACK RIVER Michigan Scour Critical — Countermeasures Installed Fair 1955 13,496
BR OF BLACK RIVER Michigan Scour Critical — Countermeasures Installed Fair 1955 13,496
HURON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1978 13,169
SWARTZ CREEK Michigan Scour Critical — Countermeasures Installed Fair 1918 12,900
KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1973 12,841
SWARTZ CREEK Michigan Scour Critical — Countermeasures Installed Poor 1938 12,678
SWARTZ CREEK Michigan Scour Critical — Countermeasures Installed Fair 1966 12,640
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1958 12,310
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1958 12,310
RUSH CREEK Michigan Scour Critical — Countermeasures Installed Fair 1949 12,246
KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1943 12,100
SCHNABLE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1988 12,100
ST JOSEPH RIVER Michigan Scour Critical — Countermeasures Installed Fair 1968 12,063
ST JOSEPH RIVER Michigan Scour Critical — Countermeasures Installed Fair 1968 12,063
BUCK CREEK Michigan Scour Critical — Countermeasures Installed Poor 1965 12,000
KEARSLEY CREEK Michigan Scour Critical — Countermeasures Installed Fair 1961 11,960
HAYES CREEK Michigan Scour Critical — Countermeasures Installed Good 1993 11,950

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