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Product Safety9,700+ CPSC product recalls Food Safety28,600+ FDA food recalls Pet Safety1.3M FDA animal adverse events Drug Safety17,500+ FDA drug recalls Device Safety38,400+ FDA device recalls Workplace Safety102,900+ OSHA injury reports Brand HistoryRecall lookup by company

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Scour Critical Bridges

23,522 bridges across the US 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 23,522 bridges have been identified as vulnerable to scour damage.

Bridge State Scour Status Condition Year Built ADT
WAIOLANI STRM Hawaii Scour Critical — Countermeasures Installed Fair 1931 12,302
CABIN JOHN CREEK Maryland Scour Critical — Countermeasures Installed Fair 1863 12,300
PETERS RIVER Rhode Island Scour Critical — Countermeasures Installed Fair 1926 12,300
COAST FK WILLAMETTE R Oregon Scour Critical — Countermeasures Installed Fair 1950 12,291
WILLAMETTE R RELIEF OPNG Oregon Scour Critical — Countermeasures Installed Fair 1955 12,291
CROSSWICKS CREEK New Jersey Scour Critical — Countermeasures Installed Poor 1924 12,291
RUSH CREEK Michigan Scour Critical — Countermeasures Installed Fair 1949 12,246
PHILLIPPI CREEK Florida Scour Critical — Countermeasures Installed Fair 1969 12,200
FARM RIVER Connecticut Scour Critical — Countermeasures Installed Fair 1935 12,200
WATER BLACKSTONE RIVER Massachusetts Scour Critical — Countermeasures Installed Fair 1924 12,200
Wissahickon Creek Pennsylvania Scour Critical — Countermeasures Installed Poor 1820 12,200
JESTER CREEK Kansas Scour Critical — Countermeasures Installed Good 1970 12,200
JESTER CREEK Kansas Scour Critical — Countermeasures Installed Good 1970 12,200
SHAWS CREEK South Carolina Scour Critical — Countermeasures Installed Fair 1954 12,200
WATER MILL RIVER Massachusetts Scour Critical — Countermeasures Installed Fair 1924 12,200
GEORGES CREEK South Carolina Scour Critical — Countermeasures Installed Poor 1948 12,200
SHEEP CREEK California Scour Critical — Countermeasures Installed Good 2005 12,199
DRAINAGE CANAL Louisiana Scour Critical — Countermeasures Installed Fair 2011 12,186
WALLKILL RIVER New Jersey Scour Critical — Countermeasures Installed Fair 1929 12,175
Marys River Oregon Scour Critical — Countermeasures Installed Fair 1954 12,164
JEANS CREEK Texas Scour Critical — Countermeasures Installed Good 1989 12,158
DRAINAGE OVERFLOW Washington Scour Critical — Countermeasures Installed Poor 1954 12,132
VALLEY CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1929 12,126
LA NANA CRK Texas Scour Critical — Countermeasures Installed Good 1975 12,115
POCONO CREEK Pennsylvania Scour Critical — Countermeasures Installed Poor 1956 12,104
PAUMALU STRM Hawaii Scour Critical — Countermeasures Installed Fair 1930 12,100
HOCKANUM RIVER Connecticut Scour Critical — Countermeasures Installed Good 1983 12,100
KALAMAZOO RIVER Michigan Scour Critical — Countermeasures Installed Fair 1943 12,100
SCHNABLE RIVER Michigan Scour Critical — Countermeasures Installed Fair 1988 12,100
BURNT CORN CREEK Alabama Scour Critical — Countermeasures Installed Fair 1959 12,100
BURNT CORN CREEK Alabama Scour Critical — Countermeasures Installed Fair 1959 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
BUTTE CREEK California Scour Critical — Countermeasures Installed Fair 1949 12,054
FANNO CREEK Oregon Scour Critical — Countermeasures Installed Fair 1971 12,041
BUSHKILL CREEK Pennsylvania Scour Critical — Countermeasures Installed Fair 1894 12,031
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Good 1966 12,026
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Good 1966 12,026
BRUSHY CREEK California Scour Critical — Countermeasures Installed Fair 1953 12,023
BOGUE CHITTO RIVER Louisiana Scour Critical — Countermeasures Installed Good 1997 12,018
BOGUE CHITTO RELIEF Louisiana Scour Critical — Countermeasures Installed Good 1996 12,018
SALMON RIVER Oregon Scour Critical — Countermeasures Installed Fair 1972 12,006
BUFFALO CREEK RELIEF Texas Scour Critical — Countermeasures Installed Poor 1930 12,005
CULEBRINAS RIVER Puerto Rico Scour Critical — Countermeasures Installed Fair 1979 12,000
GARNETT CREEK California Scour Critical — Countermeasures Installed Poor 1902 12,000
HATCHET CREEK Florida Scour Critical — Countermeasures Installed Poor 1959 12,000
Intracoastal Waterway Florida Scour Critical — Countermeasures Installed Fair 1989 12,000
Intracoastal Waterway Florida Scour Critical — Countermeasures Installed Fair 1987 12,000
DUCK CRK Nevada Scour Critical — Countermeasures Installed Good 1974 12,000
POSSESSION SOUND Washington Scour Critical — Countermeasures Installed Fair 1987 12,000

Scour Critical Bridges by State

States ranked by number of scour critical bridges.

StateScour CriticalUnaddressedCountermeasuresIneffective
Texas 3,912 75 516 3,321
Pennsylvania 2,233 45 2,187 1
Louisiana 1,302 13 1,288 1
South Carolina 1,263 0 1,217 46
Oregon 1,231 4 1,221 6
Michigan 1,081 14 1,062 5
Nebraska 962 224 732 6
New York 864 9 780 75
Indiana 756 7 749 0
Wisconsin 751 0 748 3
Kansas 638 9 626 3
California 623 27 562 34
Tennessee 581 12 569 0
Washington 516 14 487 15
Puerto Rico 496 9 487 0
Alabama 450 1 423 26
Iowa 392 3 385 4
New Jersey 362 2 360 0
Florida 357 4 339 14
Oklahoma 317 33 283 1
Missouri 312 4 307 1
Mississippi 301 6 286 9
Connecticut 279 0 276 3
Minnesota 257 38 202 17
Vermont 242 0 240 2
Colorado 241 3 238 0
Idaho 215 18 186 11
South Dakota 207 3 203 1
Arkansas 187 3 129 55
Massachusetts 166 15 106 45
Montana 166 13 140 13
Arizona 164 2 160 2
West Virginia 160 2 98 60
Alaska 159 1 146 12
Maine 140 13 126 1
North Carolina 130 9 105 16
New Mexico 127 4 114 9
North Dakota 102 14 87 1
Utah 100 6 82 12
Georgia 99 1 81 17
Illinois 99 3 85 11
Nevada 94 0 85 9
Rhode Island 94 0 93 1
New Hampshire 86 2 78 6
Hawaii 83 0 82 1
Kentucky 56 16 39 1
Maryland 54 1 51 2
Wyoming 51 1 48 2
Delaware 39 0 39 0
Ohio 12 2 4 6
Virginia 8 0 8 0
District of Columbia 5 0 4 1

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