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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
E BR ST JOSEPH OF MAUMEE Michigan Scour Critical — Countermeasures Installed Poor 1947 282
DOWAGIAC CREEK Michigan Scour Critical — Countermeasures Installed Fair 1984 273
AUSTIN CREEK Michigan Scour Critical — Countermeasures Installed Fair 1965 271
SHIAWASSEE RIVER Michigan Scour Critical — Countermeasures Installed Good 1978 270
GUN RIVER Michigan Scour Critical — Countermeasures Installed Good 1982 268
U OF M LAKE DRAIN Michigan Scour Critical — Countermeasures Installed Good 1990 266
SPAULDING EXTENSION Michigan Scour Critical — Countermeasures Installed Poor 1924 264
STATE & COLLING I/C DRN Michigan Scour Critical — Countermeasures Installed Fair 1972 260
LOCKWOOD DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1979 260
SMITH CREEK Michigan Scour Critical — Countermeasures Installed Poor 1937 253
GUN RIVER Michigan Scour Critical — Countermeasures Installed Good 1978 250
DEVILS RIVER Michigan Scour Critical — Countermeasures Installed Fair 1957 250
BACH DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1981 250
FORD RIVER Michigan Scour Critical — Countermeasures Installed Fair 1927 250
PIGEON RIVER Michigan Scour Critical — Countermeasures Installed Fair 1982 250
WEST CEDAR DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1900 250
N BRANCH KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1933 250
LITTLE CEDAR RIVER Michigan Scour Critical — Countermeasures Installed Good 1988 250
NORTH BR CHIPPEWA RIVER Michigan Scour Critical — Countermeasures Installed Fair 1937 246
NORTH BR CHIPPEWA RIVER Michigan Scour Critical — Countermeasures Installed Fair 1937 246
CHOCOLAY RIVER Michigan Scour Critical — Countermeasures Installed Good 2024 245
NORTHWEST DRAIN OUTLET 1 Michigan Scour Critical — Countermeasures Installed Fair 1972 240
SWAN CREEK Michigan Scour Critical — Countermeasures Installed Poor 1960 240
SALINE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1968 236
JONES CREEK Michigan Scour Critical — Countermeasures Installed Poor 1938 232
KLOECKNER CREEK Michigan Scour Critical — Countermeasures Installed Poor 1928 230
NORTHWOOD DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1981 226
S BR CASS RIVER I/C DRN Michigan Scour Critical — Countermeasures Installed Fair 1981 225
MISTEGUAY CREEK Michigan Scour Critical — Countermeasures Installed Poor 1930 221
RAILROAD DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1937 220
GOGOMAIN RIVER Michigan Scour Critical — Countermeasures Installed Fair 1980 220
S BR OF TOBACCO RIV Michigan Scour Critical — Countermeasures Installed Poor 1970 220
BAY CREEK Michigan Scour Critical — Countermeasures Installed Poor 1971 220
CENTRAL DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1971 219
PINE RIVER Michigan Scour Critical — Countermeasures Installed Poor 1931 216
ALGER CREEK Michigan Scour Critical — Countermeasures Installed Fair 1930 216
LITTLE RIVER Michigan Scour Critical — Countermeasures Installed Poor 1920 216
KEARSLEY CREEK Michigan Scour Critical — Countermeasures Installed Poor 1937 215
CENTRAL DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1971 215
BEAR SWAMP CREEK Michigan Scour Critical — Countermeasures Installed Fair 1950 214
SE BRANCH OF MAPLE RIVER Michigan Scour Critical — Countermeasures Installed Poor 1914 212
MIDDLE BR TOBACCO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1964 210
MID. BRANCH MACON DRAIN Michigan Scour Critical — Countermeasures Installed Good 1976 210
WHITNEY CREEK Michigan Scour Critical — Countermeasures Installed Good 2024 208
MARSH CREEK Michigan Scour Critical — Countermeasures Installed Poor 1973 207
VERMILION CREEK Michigan Scour Critical — Countermeasures Installed Fair 1970 206
MIDDLE BR TOBACCO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1980 205
CEDAR RIVER Michigan Scour Critical — Countermeasures Installed Fair 1975 205
JO DRAIN Michigan Scour Critical — Countermeasures Installed Poor 1938 202
BR. #1 NORTHWEST DRAIN Michigan Scour Critical — Countermeasures Installed Fair 1965 200

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