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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
Rogue River Oregon Scour Critical — Countermeasures Installed Fair 1942 7,259
Rickreall Creek Oregon Scour Critical — Countermeasures Installed Fair 1918 7,225
Rickreall Creek Oregon Scour Critical — Countermeasures Installed Fair 1969 7,225
Salmon River Oregon Scour Critical — Countermeasures Installed Poor 1930 7,215
LOUSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1974 6,962
WILLIAMSON RIVER Oregon Scour Critical — Countermeasures Installed Fair 1989 6,854
Gnat Creek Oregon Scour Critical — Countermeasures Installed Fair 1929 6,811
STAGE GULCH Oregon Scour Critical — Countermeasures Installed Fair 1989 6,790
Grindy Creek Oregon Scour Critical — Countermeasures Installed Fair 1960 6,737
Cox Creek Oregon Scour Critical — Countermeasures Installed Fair 1940 6,722
PETERSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 6,611
MILL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1965 6,600
SUTHERLIN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1921 6,589
WILLAMETTE R/RIVER RD S Oregon Scour Critical — Countermeasures Installed Fair 1951 6,536
N FORK ASH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1957 6,536
LONG TOM RIVER OVERFLOW Oregon Scour Critical — Countermeasures Installed Good 1988 6,530
DEER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1950 6,466
MILTON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 6,466
OVERFLOW CHANNEL Oregon Scour Critical — Countermeasures Installed Fair 1970 6,459
TUALATIN RIVER Oregon Scour Critical — Countermeasures Installed Fair 1971 6,446
LONG TOM RIVER Oregon Scour Critical — Countermeasures Installed Fair 1963 6,426
Wolf Creek Oregon Scour Critical — Countermeasures Installed Fair 1938 6,383
Nehalem River Oregon Scour Critical — Countermeasures Installed Fair 1940 6,383
Abiqua Creek Oregon Scour Critical — Countermeasures Installed Poor 1934 6,347
PANTHER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 6,338
WILLAMETTE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1955 6,321
South Fork Rock Creek Oregon Scour Critical — Countermeasures Installed Fair 1975 6,320
Crow Creek Oregon Scour Critical — Countermeasures Installed Fair 1921 6,255
USRS CANAL Oregon Scour Critical — Countermeasures Installed Fair 1949 6,228
POWDER RIVER Oregon Scour Critical — Countermeasures Installed Fair 1972 6,205
POWDER RIVER Oregon Scour Critical — Countermeasures Installed Fair 1972 6,205
OLALLA CREEK Oregon Scour Critical — Countermeasures Installed Fair 1949 6,199
CLATSKANIE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1934 6,189
FLOODWAY DITCH Oregon Scour Critical — Countermeasures Installed Fair 1964 6,188
FLOODWAY DITCH Oregon Scour Critical — Countermeasures Installed Fair 1964 6,188
North Fork Quartz Creek Oregon Scour Critical — Countermeasures Installed Fair 1939 6,082
South Fork Quartz Creek Oregon Scour Critical — Countermeasures Installed Fair 1938 6,082
Columbia River Oregon Scour Critical — Countermeasures Installed Fair 1962 6,042
ELK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1967 6,041
MT SCOTT CREEK Oregon Scour Critical — Countermeasures Installed Good 1970 5,974
OAK CR Oregon Scour Critical — Countermeasures Installed Fair 1978 5,930
PARSONS CREEK Oregon Scour Critical — Countermeasures Installed Fair 1978 5,859
PORTER CREEK Oregon Scour Critical — Countermeasures Installed Good 1986 5,811
A2 CHANNEL Oregon Scour Critical — Countermeasures Installed Good 1993 5,694
LITTLE BUTTE CREEK Oregon Scour Critical — Countermeasures Installed Good 2005 5,681
FANNO CREEK Oregon Scour Critical — Countermeasures Installed Poor 1958 5,667
Devils Lake Fk Wilson R Oregon Scour Critical — Countermeasures Installed Fair 1940 5,662
Mill Creek Oregon Scour Critical — Countermeasures Installed Fair 1961 5,594
South Santiam River Oregon Scour Critical — Countermeasures Installed Fair 1973 5,594
Marquam Creek Oregon Scour Critical — Countermeasures Installed Good 1985 5,569

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