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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
SHAN CREEK Oregon Scour Critical — Countermeasures Installed Good 1988 1,316
BEAR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1957 1,300
SILVIES SLOUGH(11TH BR) Oregon Scour Critical — Countermeasures Installed Good 1971 1,299
FOLEY SLOUGH(13TH BR) Oregon Scour Critical — Countermeasures Installed Fair 1971 1,299
SILVIES SLOUGH(15TH BR) Oregon Scour Critical — Countermeasures Installed Fair 1971 1,299
E FK HOOD RV Oregon Scour Critical — Countermeasures Installed Fair 1965 1,287
ABIQUA CREEK Oregon Scour Critical — Countermeasures Installed Good 1962 1,280
ABIQUA CREEK Oregon Scour Critical — Countermeasures Installed Fair 1987 1,280
SAND CREEK Oregon Scour Critical — Countermeasures Installed Fair 1978 1,273
COAST FORK WILLAMETTE R. Oregon Scour Critical — Countermeasures Installed Fair 1960 1,258
NEAL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 1,255
CROW CREEK Oregon Scour Critical — Countermeasures Installed Fair 1994 1,248
CALAPOOIA RV Oregon Scour Critical — Countermeasures Installed Poor 1960 1,236
NORTH UMPQUA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1957 1,216
JOHN DAY RIVER (SPRAY) Oregon Scour Critical — Countermeasures Installed Fair 1963 1,214
PLUM CREEK Oregon Scour Critical — Countermeasures Installed Good 1985 1,202
Oak Ranch Creek Oregon Scour Critical — Countermeasures Installed Poor 2009 1,200
FERRY CREEK Oregon Scour Critical — Countermeasures Installed Poor 1960 1,200
Alder Creek Oregon Scour Critical — Countermeasures Installed Fair 1935 1,194
SILVIES SLOUGH(17TH BR) Oregon Scour Critical — Countermeasures Installed Good 1971 1,176
ABIQUA CREEK Oregon Scour Critical — Countermeasures Installed Fair 2006 1,173
Mill Creek Oregon Scour Critical — Countermeasures Installed Fair 1953 1,162
DRY CREEK Oregon Scour Critical — Countermeasures Installed Good 1958 1,149
PATTERSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1963 1,141
NOTI CREEK Oregon Scour Critical — Countermeasures Installed Fair 1977 1,135
MIDDLE FORK SANTIAM R. Oregon Scour Critical — Countermeasures Installed Fair 1965 1,133
SODOM DITCH Oregon Scour Critical — Countermeasures Installed Fair 1977 1,133
GRAVE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1964 1,131
NESTUCCA RIVER Oregon Scour Critical — Countermeasures Installed Fair 2006 1,126
Maltby Creek Oregon Scour Critical — Countermeasures Installed Fair 1956 1,124
LAMPA CREEK Oregon Scour Critical — Countermeasures Installed Good 1987 1,123
Siletz River Oregon Scour Critical — Countermeasures Installed Fair 1956 1,109
ANSON ROGER BR.S. COOS R Oregon Scour Critical — Countermeasures Installed Fair 1975 1,105
ROCK CREEK Oregon Scour Critical — Countermeasures Installed Poor 1957 1,100
CLEAR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1957 1,100
SANDY RIVER Oregon Scour Critical — Countermeasures Installed Fair 1965 1,100
NORTH FORK SIUSLAW RIVER Oregon Scour Critical — Countermeasures Installed Fair 1976 1,092
MHR & UNNAMED CR Oregon Scour Critical — Countermeasures Installed Fair 1967 1,089
Luckiamute River Oregon Scour Critical — Countermeasures Installed Good 1966 1,088
Maxfield Creek Oregon Scour Critical — Countermeasures Installed Fair 1967 1,088
Price Creek Oregon Scour Critical — Countermeasures Installed Fair 1967 1,088
MAD CREEK Oregon Scour Critical — Countermeasures Installed Good 2013 1,082
EVANS CREEK Oregon Scour Critical — Countermeasures Installed Good 1987 1,074
BEAVER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1978 1,073
NESTUCCA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1971 1,061
NESTUCCA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1983 1,061
MILTON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1976 1,058
BRIDGE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1951 1,047
GORDAN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1963 1,045
CAT CREEK Oregon Scour Critical — Countermeasures Installed Good 2007 1,042

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