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
COW CREEK Oregon Scour Critical — Countermeasures Installed Fair 1944 2,053
SUCCOR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1975 2,049
MOLALLA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1930 2,038
SILK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1982 2,025
N FK SCAPPOOSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1956 2,014
N FK SCAPPOOSE CREEK Oregon Scour Critical — Countermeasures Installed Good 1959 1,967
N UMPQUA RV (LONE ROCK) Oregon Scour Critical — Countermeasures Installed Fair 1954 1,942
Trask Creek Oregon Scour Critical — Countermeasures Installed Fair 1963 1,942
Agency Creek Oregon Scour Critical — Countermeasures Installed Fair 1929 1,934
JUMPOFF JOE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 1,930
MARYS RIVER Oregon Scour Critical — Countermeasures Installed Fair 1964 1,929
GRANDE RONDE R(NE ELGIN) Oregon Scour Critical — Countermeasures Installed Fair 1935 1,911
ALTHOUSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 1,910
INDIAN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1939 1,893
JOHN DAY R(PRAIRIE CITY) Oregon Scour Critical — Countermeasures Installed Fair 1939 1,893
JORDAN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1985 1,882
PINE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1960 1,863
OWYHEE RIVER (ROME) Oregon Scour Critical — Countermeasures Installed Fair 1936 1,862
SILVIES RIVER(3RD BR) Oregon Scour Critical — Countermeasures Installed Fair 1971 1,858
SILVIES SLOUGH(4TH BR) Oregon Scour Critical — Countermeasures Installed Fair 1971 1,858
SOUTH SANTIAM RIVER Oregon Scour Critical — Countermeasures Installed Fair 1961 1,854
N FORK CHETCO RIVER Oregon Scour Critical — Countermeasures Installed Fair 1952 1,848
EAST BIRCH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1930 1,845
Hood River Oregon Scour Critical — Countermeasures Installed Fair 1964 1,837
MCKENZIE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1968 1,833
TAYLOR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1992 1,824
EDSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 1,791
Jordan Creek Oregon Scour Critical — Countermeasures Installed Poor 1963 1,786
HERMAN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 1,775
GALICE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1954 1,774
BLACK CANYON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 1,772
PULASKI CREEK Oregon Scour Critical — Countermeasures Installed Good 1977 1,767
FAT ELK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1977 1,767
MOSBY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 1,766
MALHEUR R (DIVERSION) Oregon Scour Critical — Countermeasures Installed Fair 2004 1,764
YELLOW CREEK Oregon Scour Critical — Countermeasures Installed Fair 1934 1,757
WALLOWA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1964 1,754
HURRICANE CREEK Oregon Scour Critical — Countermeasures Installed Good 1964 1,754
MOHAWK RIVER Oregon Scour Critical — Countermeasures Installed Fair 1981 1,732
SILVIES SLOUGH(6TH BR) Oregon Scour Critical — Countermeasures Installed Good 1971 1,729
SILVIES SLOUGH(9TH BR) Oregon Scour Critical — Countermeasures Installed Good 1971 1,729
Louie Creek Oregon Scour Critical — Countermeasures Installed Fair 1962 1,724
Louie Creek Oregon Scour Critical — Countermeasures Installed Poor 1962 1,724
SLATE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1956 1,720
B-91 OVER JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1982 1,719
ROBERTS CREEK Oregon Scour Critical — Countermeasures Installed Fair 1978 1,717
JUMPOFF JOE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 1,710
Lost Creek Oregon Scour Critical — Countermeasures Installed Fair 1961 1,701
MILK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 1,699
COYOTE CREEK OFLOW Oregon Scour Critical — Countermeasures Installed Fair 1969 1,688

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.