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
Calapooia River Oregon Scour Critical — Countermeasures Installed Fair 1937 3,351
Mid. Fk. Coquille River Oregon Scour Critical — Countermeasures Installed Fair 1962 3,336
Mid. Fk. Coquille River Oregon Scour Critical — Countermeasures Installed Fair 1962 3,336
Mid. Fk. Coquille River Oregon Scour Critical — Countermeasures Installed Fair 1962 3,336
NORTH FORK ASH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1922 3,329
Clear Creek Oregon Scour Critical — Countermeasures Installed Fair 1931 3,317
SILVER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1929 3,310
HAWN CREEK Oregon Scour Critical — Countermeasures Installed Poor 1964 3,288
SHELTON DITCH Oregon Scour Critical — Countermeasures Installed Fair 1959 3,278
N FK LITTLE BUTTE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1968 3,276
ROW RIVER Oregon Scour Critical — Countermeasures Installed Fair 1969 3,263
TRAIL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 3,256
LINK RIVER Oregon Scour Critical — Countermeasures Installed Fair 1926 3,241
E FORK BIRCH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1940 3,218
Beaver Creek Oregon Scour Critical — Countermeasures Installed Fair 1968 3,196
LITTLE APPLEGATE RIVER Oregon Scour Critical — Countermeasures Installed Fair 2006 3,191
WILSON RIVER Oregon Scour Critical — Countermeasures Installed Fair 1974 3,183
Chehulpum Creek Oregon Scour Critical — Countermeasures Installed Fair 1919 3,115
SHOTGUN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1964 3,106
WOLF CREEK Oregon Scour Critical — Countermeasures Installed Fair 1940 3,071
COAST FK WILLAMETTE R Oregon Scour Critical — Countermeasures Installed Fair 1965 3,020
Big Creek Oregon Scour Critical — Countermeasures Installed Fair 1931 3,003
RICKREALL CREEK Oregon Scour Critical — Countermeasures Installed Good 1965 3,001
MCNEIL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 2,994
OAK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 2,987
Palmer Creek Oregon Scour Critical — Countermeasures Installed Fair 1984 2,939
SARDINE CREEK Oregon Scour Critical — Countermeasures Installed Good 1938 2,931
S FK SCAPPOOSE CREEK Oregon Scour Critical — Countermeasures Installed Poor 1957 2,926
SANDY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 2,925
COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1964 2,925
Mid. Fk. Coquille River Oregon Scour Critical — Countermeasures Installed Fair 1962 2,925
COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1964 2,925
Tenmile Creek Oregon Scour Critical — Countermeasures Installed Fair 1931 2,922
Willow Creek Oregon Scour Critical — Countermeasures Installed Fair 1964 2,909
JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Poor 1930 2,901
BEAR CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 2,900
FERN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1964 2,893
MIDDLE FK COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Good 1984 2,879
HOLMES CREEK Oregon Scour Critical — Countermeasures Installed Fair 1984 2,879
MIDDLE FK COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1976 2,879
COQUILLE RIVER MIDDLE FK Oregon Scour Critical — Countermeasures Installed Fair 1976 2,879
MIDDLE FK COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1984 2,879
MIDDLE FK COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1983 2,879
MIDDLE FK COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1984 2,879
MIDDLE FK COQUILLE RIVER Oregon Scour Critical — Countermeasures Installed Good 1984 2,879
JUMPOFF JOE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1940 2,871
POWDER R (HUGHES LN) Oregon Scour Critical — Countermeasures Installed Good 1966 2,854
BEECH CR(MT VERNON) Oregon Scour Critical — Countermeasures Installed Fair 1956 2,836
SOUTH YAMHILL RIVER Oregon Scour Critical — Countermeasures Installed Fair 1970 2,809
CATHERINE CR (DAVIS DAM) Oregon Scour Critical — Countermeasures Installed Fair 1966 2,801

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.