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Scour Critical Bridges in Maine

140 bridges in Maine 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 140 bridges in Maine have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
LITTLE NESOWADNEHUNK Maine Scour Critical — Countermeasures Installed Fair 1986 144
WILSON STREAM Maine Scour Critical — Countermeasures Installed Fair 1950 140
INTERVALE BROOK Maine Scour Critical — Countermeasures Installed Poor 1980 133
WEBB RIVER Maine Scour Critical — Countermeasures Installed Poor 1980 129
MCGURDY STREAM Maine Scour Critical — Countermeasures Installed Poor 1950 127
LIMESTONE STREAM Maine Scour Critical — Countermeasures Installed Poor 1953 120
WEBB RIVER Maine Scour Critical — Countermeasures Installed Fair 1904 117
FRENCH MILLS BROOK Maine Scour Critical — Countermeasures Installed Poor 1954 103
FILLIBOWN BROOK Maine Scour Critical — Countermeasures Installed Poor 1923 90
LEMON STREAM Maine Scour Critical — Countermeasures Installed Poor 1950 90
W BR MATTAWAMKEAG RV Maine Scour Critical — Countermeasures Installed Fair 1972 90
MILL STREAM Maine Scour Critical — Countermeasures Installed Poor 1948 84
ST GEORGE RIVER Maine Scour Critical — Countermeasures Installed Fair 1923 80
NO NAME BROOK Maine Scour Critical — Countermeasures Installed Poor 1966 78
SAWYER BROOK Maine Scour Critical — Countermeasures Installed Fair 2003 72
ALDER BROOK Maine Scour Critical — Countermeasures Installed Good 2012 72
KINGSBURY STREAM Maine Scour Critical — Countermeasures Installed Fair 1941 72
WHINSHIP (CONANT) STREAM Maine Scour Critical — Countermeasures Installed Fair 1953 66
ALDER STREAM Maine Scour Critical — Countermeasures Installed Poor 1935 63
GREELEY BROOK Maine Scour Critical — Countermeasures Installed Poor 1984 62
LITTLE RIVER Maine Scour Critical — Countermeasures Installed Poor 1940 60
MOOSEHORN STREAM Maine Scour Critical — Countermeasures Installed Fair 2009 58
PLEASANT RIVER Maine Scour Critical — Countermeasures Installed Good 2016 54
KEZAR RIVER Maine Scour Critical — Countermeasures Installed Poor 2020 50
OLD COURSE OF SACO RIVER Maine Scour Critical — Countermeasures Installed Fair 1857 50
HAMMOND BROOK Maine Scour Critical — Countermeasures Installed Fair 1959 50
W BRANCH PLEASANT RIVER Maine Scour Critical — Countermeasures Installed Fair 1957 41
MATTASEUNK STREAM Maine Scour Critical — Countermeasures Installed Poor 1923 41
SALMON STREAM Maine Scour Critical — Countermeasures Installed Fair 1955 41
LITTLE OSSIPEE RIVER Maine Scour Critical — Countermeasures Installed Fair 1892 40
RUN-AROUND STREAM Maine Scour Critical — Countermeasures Installed Fair 1997 31
SADDLEBACK STREAM Maine Scour Critical — Countermeasures Installed Fair 1979 30
SHEEPSCOT RIVER Maine Scour Critical — Countermeasures Installed Poor 1935 29
CASCADE STR Maine Scour Critical — Countermeasures Installed Poor 1934 26
BOWLEY BROOK Maine Scour Critical — Countermeasures Installed Poor 1987 26
CARLETON STREAM Maine Scour Critical — Countermeasures Installed Poor 1954 21
CAPTAIN AMBROSE BEAR STR Maine Scour Critical — Countermeasures Installed Fair 1955 20
KENDUSKEAG STR Maine Scour Critical — Countermeasures Installed Good 2003 10
BLACKSTONE BROOK Maine Scour Critical — Countermeasures Installed Good 1945 10
NESOWADNEHUNK STREAM Maine Scour Critical — Countermeasures Installed Fair 1965 —

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