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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
THORNAPPLE RIVER Michigan Scour Critical — Countermeasures Installed Good 1930 11,887
HAYWORTH COUNTY DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1988 11,851
HAYWORTH COUNTY DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1957 11,851
HERSEY CREEK Michigan Scour Critical — Countermeasures Installed Fair 1985 11,841
HERSEY CREEK Michigan Scour Critical — Countermeasures Installed Fair 1985 11,841
CLINTON RIVER Michigan Scour Critical — Countermeasures Installed Poor 1960 11,736
CASS RIVER Michigan Scour Critical — Countermeasures Installed Fair 1943 11,600
S BR RAISIN RIVER Michigan Scour Critical — Countermeasures Installed Poor 1932 11,522
RED CEDAR RIVER Michigan Scour Critical — Countermeasures Installed Good 2024 11,510
DENTON CREEK Michigan Scour Critical — Countermeasures Installed Fair 1959 11,420
ST JOSEPH RIVER Michigan Scour Critical — Countermeasures Installed Fair 1954 11,300
SWARTZ CREEK Michigan Scour Critical — Countermeasures Installed Fair 1969 11,275
PLUM BROOK DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1972 11,214
CLINTON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1928 11,186
S BR OF GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1959 11,135
RABBIT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1935 11,100
S BR BAD RIVER Michigan Scour Critical — Countermeasures Installed Fair 1977 10,976
N BR BAD RIVER Michigan Scour Critical — Countermeasures Installed Fair 1929 10,976
HOG CREEK Michigan Scour Critical — Countermeasures Installed Fair 1967 10,926
HOG CREEK Michigan Scour Critical — Countermeasures Installed Fair 1967 10,926
SHIAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Good 1906 10,918
S BR OF GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1959 10,893
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1966 10,885
KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1964 10,850
MAPLE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1988 10,831
MAPLE RIVER Michigan Scour Critical — Countermeasures Installed Good 1955 10,831
CLINTON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1964 10,830
TEBO DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1937 10,813
CADDELL DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1973 10,800
DUNCAN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1957 10,700
KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1968 10,679
KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1968 10,679
RIVER RAISIN Michigan Scour Critical — Countermeasures Installed Fair 1953 10,655
ELK LAKE CREEK Michigan Scour Critical — Countermeasures Installed Good 2024 10,633
NASH CREEK Michigan Scour Critical — Countermeasures Installed Fair 1962 10,377
S BR SHIAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1918 10,370
BUCK CREEK Michigan Scour Critical — Countermeasures Installed Fair 1965 10,300
INDIAN MILL CREEK Michigan Scour Critical — Countermeasures Installed Good 1984 10,251
TITTABAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1976 10,133
FERDUN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1956 9,785
E BR AU SABLE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1961 9,772
S BR TOBACCO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1962 9,699
S BR TOBACCO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1962 9,699
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1960 9,625
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Poor 1957 9,599
GRAND RIVER Michigan Scour Critical — Countermeasures Installed Fair 1957 9,599
ROCKY RIVER Michigan Scour Critical — Countermeasures Installed Fair 1951 9,588
ROCKY RIVER Michigan Scour Critical — Countermeasures Installed Fair 1956 9,588
HOLDEN DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1923 9,585
WHITE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1965 9,550

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