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
EAGLE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1952 2,781
LONG TOM RIVER Oregon Scour Critical — Countermeasures Installed Fair 1978 2,746
Beaver Creek Oregon Scour Critical — Countermeasures Installed Fair 1966 2,725
CUNNINGHAM CREEK Oregon Scour Critical — Countermeasures Installed Fair 2005 2,717
COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1964 2,715
COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1965 2,715
Beaver Creek Oregon Scour Critical — Countermeasures Installed Fair 1936 2,713
SALT CREEK Oregon Scour Critical — Countermeasures Installed Poor 1965 2,706
N FK SCAPPOOSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1957 2,700
BEAR TRAP CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 2,681
BRUSH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 2,681
WARD CREEK Oregon Scour Critical — Countermeasures Installed Fair 1984 2,652
ELK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1957 2,644
ABIQUA CREEK Oregon Scour Critical — Countermeasures Installed Fair 1954 2,635
LOSTINE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1953 2,619
POWELL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1940 2,612
POWDER RIVER (BRIDGE ST) Oregon Scour Critical — Countermeasures Installed Fair 1933 2,551
ASH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1972 2,523
DRY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1964 2,503
LITTLE CREEK (UNION) Oregon Scour Critical — Countermeasures Installed Fair 1922 2,496
MALHEUR RIVER (HOPE) Oregon Scour Critical — Countermeasures Installed Fair 1966 2,470
COFFEE CREEK Oregon Scour Critical — Countermeasures Installed Good 1989 2,467
JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Good 1970 2,436
APPLEGATE R (APPLEGATE) Oregon Scour Critical — Countermeasures Installed Fair 1934 2,419
Rock Creek Oregon Scour Critical — Countermeasures Installed Fair 1926 2,352
SILVER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1956 2,325
CLACKAMAS RIVER Oregon Scour Critical — Countermeasures Installed Fair 1970 2,268
TAYLOR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1954 2,267
JUMPOFF JOE CREEK Oregon Scour Critical — Countermeasures Installed Good 1970 2,264
WALLA WALLA RIVER Oregon Scour Critical — Countermeasures Installed Good 1977 2,251
NO FK SCAPPOOSE CR Oregon Scour Critical — Countermeasures Installed Fair 1954 2,250
FOOTS CREEK Oregon Scour Critical — Countermeasures Installed Fair 1928 2,246
South Yamhill River Oregon Scour Critical — Countermeasures Installed Fair 1929 2,224
PLEASANT CR./QUEENS BRCH Oregon Scour Critical — Countermeasures Installed Fair 1975 2,219
ROCK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1930 2,209
N YAMHILL RIVER Oregon Scour Critical — Countermeasures Installed Fair 1981 2,200
ANTELOPE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1973 2,156
UPTON SLOUGH Oregon Scour Critical — Countermeasures Installed Fair 1959 2,153
N. FORK BEAVER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1954 2,143
N FK SCAPPOOSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 2,124
Depot Slough Oregon Scour Critical — Countermeasures Installed Fair 1962 2,122
PRINGLE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1993 2,118
HAY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1923 2,116
DIXIE CRK (PRAIRIE CITY) Oregon Scour Critical — Countermeasures Installed Fair 1939 2,104
CHEHALEM CREEK Oregon Scour Critical — Countermeasures Installed Fair 1965 2,093
TUALATIN RIVER Oregon Scour Critical — Countermeasures Installed Fair 1977 2,060
MARYS RIVER Oregon Scour Critical — Countermeasures Installed Fair 1961 2,060
SO BR QUEENS CR/EVAN RD Oregon Scour Critical — Countermeasures Installed Fair 1964 2,054
BUCKAROO CABIN CREEK Oregon Scour Critical — Countermeasures Installed Good 1962 2,054
LITTLE SANDY CREEK Oregon Scour Critical — Countermeasures Installed Good 1962 2,054

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.