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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
BIG CEDAR RIVER Michigan Scour Critical — Countermeasures Installed Good 1933 3,591
SHIAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Poor 1930 3,587
SUCKER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1967 3,520
FORESTER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1934 3,500
CASS RIVER Michigan Scour Critical — Countermeasures Installed Fair 1957 3,478
BIG FISHDAM RIVER Michigan Scour Critical — Countermeasures Installed Fair 1936 3,462
WABASCON CREEK Michigan Scour Critical — Countermeasures Installed Fair 1929 3,430
KAWKAWLIN RIVER Michigan Scour Critical — Countermeasures Installed Fair 1928 3,404
RAINY RIVER Michigan Scour Critical — Countermeasures Installed Fair 1954 3,382
MICHIGAMME RIVER Michigan Scour Critical — Countermeasures Installed Fair 1958 3,375
BALL CREEK Michigan Scour Critical — Countermeasures Installed Good 2003 3,332
TITTABAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1958 3,302
FRANK AND POET DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1959 3,300
CEDAR CREEK Michigan Scour Critical — Countermeasures Installed Fair 1964 3,239
PINCONNING RIVER Michigan Scour Critical — Countermeasures Installed Good 1995 3,218
N BRANCH FLINT RIVER Michigan Scour Critical — Countermeasures Installed Poor 1965 3,217
BR ONTONAGON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1953 3,202
NOTTAWA CREEK Michigan Scour Critical — Countermeasures Installed Poor 1931 3,200
PIGEON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1939 3,188
PORTAGE RIVER DRAIN Michigan Scour Critical — Countermeasures Installed Good 1939 3,180
MIDDLE BRANCH RIVER Michigan Scour Critical — Countermeasures Installed Poor 1939 3,158
MACON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1947 3,140
BUTTERNUT CREEK Michigan Scour Critical — Countermeasures Installed Fair 1927 3,115
DEER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1933 3,101
STURGEON CREEK Michigan Scour Critical — Countermeasures Installed Fair 1981 3,100
WHITE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1963 3,067
BLANCHARD DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1948 3,056
LIME CREEK Michigan Scour Critical — Countermeasures Installed Fair 1946 3,056
ALGER CREEK Michigan Scour Critical — Countermeasures Installed Poor 1928 3,044
PAINT RIVER Michigan Scour Critical — Countermeasures Installed Fair 1970 3,039
SWAN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1926 3,030
WILLIAMS CREEK Michigan Scour Critical — Countermeasures Installed Fair 1927 3,000
BUCK CREEK Michigan Scour Critical — Countermeasures Installed Fair 1985 3,000
KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Poor 1948 2,991
STURGEON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1956 2,977
SHERMAN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1939 2,969
N BR BLACK RIVER Michigan Scour Critical — Countermeasures Installed Fair 1988 2,962
W BR WAISKA RIVER Michigan Scour Critical — Countermeasures Installed Fair 1975 2,956
ROGUE RIVER Michigan Scour Critical — Countermeasures Installed Good 1963 2,946
CASS RIVER Michigan Scour Critical — Countermeasures Installed Fair 1966 2,920
BIG CEDAR RIVER Michigan Scour Critical — Countermeasures Installed Fair 1952 2,900
MENOMINEE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1966 2,875
KAWKAWLIN RIVER Michigan Scour Critical — Countermeasures Installed Fair 1987 2,870
DEAD CREEK Michigan Scour Critical — Countermeasures Installed Fair 1981 2,860
EVANS BRANCH ROUGE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1970 2,834
TUPPER BROOK Michigan Scour Critical — Countermeasures Installed Fair 1980 2,830
S BR CASS RIVER I/C DRN Michigan Scour Critical — Countermeasures Installed Poor 1930 2,754
N BRANCH SWAN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1926 2,730
THORNAPPLE RIVER Michigan Scour Critical — Countermeasures Installed Good 1970 2,730
EVANS CREEK Michigan Scour Critical — Countermeasures Installed Poor 1934 2,657

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