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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
Mill Creek Oregon Scour Critical — Countermeasures Installed Fair 1930 31,897
BARNETT ROAD AT BEAR CR Oregon Scour Critical — Countermeasures Installed Fair 2009 31,423
WILLAMETTE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1912 30,871
HONEYMAN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1919 30,567
WILLAMETTE R OFLOW WB Oregon Scour Critical — Countermeasures Installed Fair 1961 29,662
Cox Creek Oregon Scour Critical — Countermeasures Installed Good 1940 29,551
Calapooia Overflow Oregon Scour Critical — Countermeasures Installed Fair 1971 29,513
Calapooia Overflow Oregon Scour Critical — Countermeasures Installed Fair 1971 29,513
Calapooia River Oregon Scour Critical — Countermeasures Installed Fair 1971 29,513
Dairy Creek Oregon Scour Critical — Countermeasures Installed Fair 1923 28,179
Oak Creek Oregon Scour Critical — Countermeasures Installed Fair 1958 27,073
Oak Creek Oregon Scour Critical — Countermeasures Installed Good 1958 27,073
Albany Ditch Oregon Scour Critical — Countermeasures Installed Fair 1958 26,927
Albany Ditch Oregon Scour Critical — Countermeasures Installed Fair 1958 26,927
SNAKE R. (HWY 493) Oregon Scour Critical — Countermeasures Installed Good 1967 26,880
ROCK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1953 25,052
Yamhill River Overflow Oregon Scour Critical — Countermeasures Installed Fair 1963 24,417
ASH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1989 24,002
Herman Creek Oregon Scour Critical — Countermeasures Installed Fair 1952 23,643
4TH STREET @ BEAR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1961 23,554
S UMPQUA R (VETS BR) Oregon Scour Critical — Countermeasures Installed Fair 1976 23,447
S UMPQUA R (VETS BR) Oregon Scour Critical — Countermeasures Installed Fair 1955 23,447
Marys River Oregon Scour Critical — Countermeasures Installed Fair 1949 23,359
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Fair 1960 23,236
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Fair 1960 23,236
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Fair 1960 23,236
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Fair 1960 23,236
Lake Creek Oregon Scour Critical — Countermeasures Installed Good 1971 23,134
Beaver Creek Oregon Scour Critical — Countermeasures Installed Fair 1929 23,127
Yamhill River Oregon Scour Critical — Countermeasures Installed Fair 1957 22,538
PRINGLE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1928 21,752
Sodom Ditch Oflow Oregon Scour Critical — Countermeasures Installed Fair 1959 21,606
Calapooia Oflow Oregon Scour Critical — Countermeasures Installed Fair 1958 21,606
Calapooia Oflow Oregon Scour Critical — Countermeasures Installed Good 1958 21,606
Sodom Ditch Oflow Oregon Scour Critical — Countermeasures Installed Fair 1958 21,606
Courtney Creek Oflow Oregon Scour Critical — Countermeasures Installed Fair 1959 21,606
Sodom Ditch Oflow Oregon Scour Critical — Countermeasures Installed Fair 1959 21,606
Calapooia Oflow Oregon Scour Critical — Countermeasures Installed Fair 1958 21,606
Calapooia Oflow Oregon Scour Critical — Countermeasures Installed Fair 1958 21,606
Courtney Creek Oregon Scour Critical — Countermeasures Installed Fair 1959 21,606
Courtney Creek Oflow Oregon Scour Critical — Countermeasures Installed Fair 1959 21,606
Courtney Creek Oregon Scour Critical — Countermeasures Installed Fair 1959 21,606
Sodom Ditch Oflow Oregon Scour Critical — Countermeasures Installed Fair 1958 21,606
TUNNEL MILL RACE Oregon Scour Critical — Countermeasures Installed Fair 1956 21,354
BEAR CR Oregon Scour Critical — Countermeasures Installed Fair 1962 21,265
BEAR CR Oregon Scour Critical — Countermeasures Installed Fair 1962 21,265
ANTELOPE CREEK Oregon Scour Critical — Countermeasures Installed Good 1999 21,174
CAMAS SWALE Oregon Scour Critical — Countermeasures Installed Fair 1961 21,171
Columbia River Oregon Scour Critical — Countermeasures Installed Fair 1929 21,169
BEAR CR Oregon Scour Critical — Countermeasures Installed Fair 1961 20,832

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