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
DOAN CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	21,800
DOAN CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	21,800
CSX RR & UNNAMED CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1949	21,772
CSX RR & UNNAMED CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1958	21,772
GRAND RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1930	21,410
GRAND RIV & BILLWOOD HWY	Michigan	Scour Critical — Countermeasures Installed	Fair	1962	21,057
ROUGE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1966	20,809
THREAD CREEK	Michigan	Scour Critical — Countermeasures Installed	Poor	1976	20,772
ROGUE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1929	20,285
E BR PAW PAW RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1960	19,936
UPPER ROUGE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1930	19,931
SALINE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	19,825
SALINE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1948	19,825
BOARDMAN RIVER	Michigan	Scour Critical — Countermeasures Installed	Poor	1980	19,628
PERNICK CREEK	Michigan	Scour Critical — Countermeasures Installed	Good	1992	19,439
FLINT RIVER	Michigan	Scour Critical — Countermeasures Installed	Good	1994	19,352
SAGINAW RIVER AND MCRR	Michigan	Scour Critical — Countermeasures Installed	Fair	1987	19,300
RABBIT RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1957	18,817
TONQUISH CREEK	Michigan	Scour Critical — Countermeasures Installed	Poor	1946	18,579
S BR FLINT RIVER	Michigan	Scour Critical — Countermeasures Installed	Poor	1948	18,440
HURON RIVER	Michigan	Scour Critical — Countermeasures Installed	Poor	1912	18,300
BELL CREEK	Michigan	Scour Critical — Countermeasures Installed	Poor	1925	18,173
N BR TEN MILE CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1959	18,124
N BR TEN MILE CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1959	18,124
BEAVER CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1919	18,099
BLACK CREEK	Michigan	Scour Critical — Countermeasures Installed	Good	1984	18,011
MUSKEGON RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1983	18,000
CLINTON RIVER	Michigan	Scour Critical — Countermeasures Installed	Good	1967	17,835
CLINTON RIVER	Michigan	Scour Critical — Countermeasures Installed	Good	1967	17,835
MANISTEE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1933	17,789
RED CEDAR RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1963	17,675
GRAND RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1948	17,638
KAWKAWLIN RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1931	17,442
KALAMAZOO RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1994	17,000
STATE DRAIN	Michigan	Scour Critical — Countermeasures Installed	Fair	1931	17,000
ROGUE R & WHITE PINE TRL	Michigan	Scour Critical — Countermeasures Installed	Fair	1977	16,978
JOHNSON DRAIN	Michigan	Scour Critical — Countermeasures Installed	Poor	1930	16,972
MIDDLE BR MACON RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	16,735
N BR MACON RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	16,735
N BR MACON RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	16,735
MIDDLE BR MACON RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	16,735
GTW RR & GRAND RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1979	16,689
PLASTER CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1916	16,531
RED CEDAR RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1926	16,395
E CHANNEL SAGINAW RIVER	Michigan	Scour Critical — Countermeasures Installed	Poor	1938	16,380
THORNAPPLE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	16,253
THORNAPPLE RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1961	16,253
THUNDER BAY RIVER	Michigan	Scour Critical — Countermeasures Installed	Fair	1932	16,200
LETTS DRAIN	Michigan	Scour Critical — Countermeasures Installed	Fair	1951	16,199
PRAIRIE CREEK	Michigan	Scour Critical — Countermeasures Installed	Fair	1938	16,168

Scour Critical Rating Codes

Code 2 — Unaddressed	Bridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken.
Code 3 — Countermeasures Installed	Protective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical.
Code 6 — Countermeasures Ineffective	Protective 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.

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