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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
HUNTERS CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 1,680
SILK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1980 1,677
MOHAWK RIVER Oregon Scour Critical — Countermeasures Installed Fair 1969 1,677
Thomas Creek Oregon Scour Critical — Countermeasures Installed Fair 1938 1,655
N FK SCAPPOOSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 1,652
MCKENZIE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1959 1,651
Little Luckiamute River Oregon Scour Critical — Countermeasures Installed Fair 1953 1,633
GRAVE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1920 1,626
COAST CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 1,612
MARION CREEK Oregon Scour Critical — Countermeasures Installed Fair 1967 1,609
E Fk Hood River Oregon Scour Critical — Countermeasures Installed Fair 1961 1,578
WALLOWA R (MINAM) Oregon Scour Critical — Countermeasures Installed Fair 1965 1,572
UMPQUA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1967 1,559
CAMPBELL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1972 1,554
Blackhorse Creek Oregon Scour Critical — Countermeasures Installed Fair 1921 1,546
LOUSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 1,545
RED GULCH Oregon Scour Critical — Countermeasures Installed Good 1992 1,545
HILLS CREEK Oregon Scour Critical — Countermeasures Installed Good 1983 1,542
SMALL BOAT CANAL Oregon Scour Critical — Countermeasures Installed Good 1972 1,539
TYGH CREEK Oregon Scour Critical — Countermeasures Installed Good 1974 1,526
E FK OF HOOD RIVER Oregon Scour Critical — Countermeasures Installed Good 1989 1,515
SOAP CREEK Oregon Scour Critical — Countermeasures Installed Good 1981 1,500
LITTLE DESCHUTES RIVER Oregon Scour Critical — Countermeasures Installed Fair 1962 1,497
SALMON RIVER Oregon Scour Critical — Countermeasures Installed Fair 1929 1,493
OWYHEE RIVER Oregon Scour Critical — Countermeasures Installed Good 1985 1,475
CHIMNEY CREEK(6TH XING) Oregon Scour Critical — Countermeasures Installed Fair 1966 1,475
CHIMNEY CREEK(7TH XING) Oregon Scour Critical — Countermeasures Installed Fair 1966 1,475
Nehalem River Oregon Scour Critical — Countermeasures Installed Fair 1958 1,469
MCKENZIE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1965 1,463
LOST CREEK Oregon Scour Critical — Countermeasures Installed Fair 1976 1,463
BEAR BRANCH Oregon Scour Critical — Countermeasures Installed Good 1977 1,453
OAK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 1,448
Marys River Oregon Scour Critical — Countermeasures Installed Fair 1950 1,447
CATHERINE CRK (OLD CHNL) Oregon Scour Critical — Countermeasures Installed Fair 1966 1,441
SILK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1988 1,434
TILLAMOOK RIVER Oregon Scour Critical — Countermeasures Installed Fair 1976 1,411
Deschutes River Oregon Scour Critical — Countermeasures Installed Good 2009 1,409
WHITE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1962 1,403
MAIN STAYTON CANAL Oregon Scour Critical — Countermeasures Installed Fair 1965 1,400
B-55 OVER JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1939 1,389
S FK COQUILLE R (POWERS) Oregon Scour Critical — Countermeasures Installed Fair 1934 1,386
WILLOW CREEK EB Oregon Scour Critical — Countermeasures Installed Fair 1980 1,380
East Fork Nehalem River Oregon Scour Critical — Countermeasures Installed Fair 1929 1,371
FERGUSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1963 1,368
N FORK COYOTE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1980 1,368
S FORK COYOTE CREEK Oregon Scour Critical — Countermeasures Installed Good 1980 1,368
COYOTE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 1,368
BRUSH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1960 1,360
JACKSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1997 1,327
LOST RIVER Oregon Scour Critical — Countermeasures Installed Good 1989 1,320

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