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Scour Critical Bridges in Oregon

1,231 bridges in Oregon 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 1,231 bridges in Oregon have been identified as vulnerable to scour damage.

Clear
Bridge State Scour Status Condition Year Built ADT
HALLS CK/ERNIE WATKINS Oregon Scour Critical — Countermeasures Installed Good 1990 191
INDIAN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1994 190
MILK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 185
S FK ROGUE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1961 185
NEHALEM RIVER Oregon Scour Critical — Countermeasures Installed Fair 2000 184
GALES CREEK Oregon Scour Critical — Countermeasures Installed Fair 1972 184
JOHN DAY R(MT VERNON) Oregon Scour Critical — Countermeasures Installed Fair 1964 183
A-2 CHANNEL SCS Oregon Scour Critical — Countermeasures Installed Fair 1970 181
CALAPOOIA RIVER Oregon Scour Critical — Countermeasures Installed Good 1979 180
GREEN PETER RESERVOIR Oregon Scour Critical — Countermeasures Installed Fair 1963 180
BAKER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 179
BULLY CREEK Oregon Scour Critical — Countermeasures Installed Good 1979 179
S FK CROOKED RIVER Oregon Scour Critical — Countermeasures Installed Fair 1956 177
JORDON CR Oregon Scour Critical — Countermeasures Installed Good 1980 177
JOHN DAY R(BRIDGE ST) Oregon Scour Critical — Countermeasures Installed Fair 1961 177
LUCKIAMUTE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1964 175
CROSBY BR/E.FK.COQUILLE Oregon Scour Critical — Countermeasures Installed Fair 1969 173
STOUT CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 171
JOHN DAY RIVER (TWICKEN) Oregon Scour Critical — Countermeasures Installed Fair 1960 170
KIZER SLOUGH Oregon Scour Critical — Countermeasures Installed Good 1987 170
LOST RIVER Oregon Scour Critical — Countermeasures Installed Fair 1985 169
MIDDLE FORK MALHEUR RIVE Oregon Scour Critical — Countermeasures Installed Fair 1957 169
N FORK NEHALEM RIVER Oregon Scour Critical — Countermeasures Installed Good 1989 168
GRANDE RONDE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1964 168
LONG TOM RIVER Oregon Scour Critical — Countermeasures Installed Good 1983 167
SLOUGH Oregon Scour Critical — Countermeasures Installed Good 1977 167
COAST FORK WILLAMETTE R Oregon Scour Critical — Countermeasures Installed Good 1978 167
INDIAN CREEK Oregon Scour Critical — Countermeasures Installed Good 1990 165
DRY GULLY Oregon Scour Critical — Countermeasures Installed Fair 1991 162
SALT CREEK Oregon Scour Critical — Countermeasures Installed Fair 1997 161
GRANDE RONDE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1975 160
POWDER R (CHANDLER LN) Oregon Scour Critical — Countermeasures Installed Fair 1953 158
MILL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1985 157
Five Rivers Oregon Scour Critical — Countermeasures Installed Fair 2002 156
E FK DAIRY CREEK Oregon Scour Critical — Countermeasures Installed Fair 2006 156
AVENUE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 154
N FORK MALHEUR RIVER Oregon Scour Critical — Countermeasures Installed Good 1986 152
CANYON Oregon Scour Critical — Countermeasures Installed Fair 1987 152
ROCK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1981 152
MAPLE CREEK Oregon Scour Critical — Countermeasures Installed Poor 1972 152
BAKEOVEN CREEK Oregon Scour Critical — Countermeasures Installed Good 1952 151
CLACKAMAS RIVER Oregon Scour Critical — Countermeasures Installed Fair 1958 149
WEST BIRCH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1965 146
REUBEN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1964 146
POWDER R(KEATING CUT-OFF Oregon Scour Critical — Countermeasures Installed Good 1962 142
CLEAR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 141
VALE MAIN CANAL Oregon Scour Critical — Countermeasures Installed Poor 1978 140
CEDAR FLAT CREEK Oregon Scour Critical — Countermeasures Installed Good 1987 140
N FK COLD SPRINGS CANYON Oregon Scour Critical — Countermeasures Installed Good 1977 140
HAY CANYON Oregon Scour Critical — Countermeasures Installed Fair 1919 140

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