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
MALHEUR RIVER Oregon Scour Critical — Countermeasures Installed Fair 1961 1,037
KANE CR/KANE CR. RD. Oregon Scour Critical — Countermeasures Installed Fair 1967 1,037
N FORK SIUSLAW RIVER Oregon Scour Critical — Countermeasures Installed Fair 1978 1,037
COI MAIN CANAL Oregon Scour Critical — Countermeasures Installed Fair 1978 1,030
DEER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1965 1,026
N F WILLAMETTE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1981 1,012
JOE NEY SLOUGH Oregon Scour Critical — Countermeasures Installed Fair 1989 1,011
UNNAMED CHANNEL Oregon Scour Critical — Countermeasures Installed Good 2024 1,000
UNNAMED CHANNEL Oregon Scour Critical — Countermeasures Installed Good 2024 1,000
UNNAMED CHANNEL Oregon Scour Critical — Countermeasures Installed Fair 2024 1,000
UNNAMED CHANNEL Oregon Scour Critical — Countermeasures Installed Good 2024 1,000
MCKENZIE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1938 999
MUDDY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1978 994
EAST FORK NEHALEM RIVER Oregon Scour Critical — Countermeasures Installed Poor 1952 991
LONG TOM RIVER Oregon Scour Critical — Countermeasures Installed Fair 1976 984
LOUSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1975 984
SILTCOOS RIVER Oregon Scour Critical — Countermeasures Installed Fair 1975 984
JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 982
ACCESS RD BR RT Oregon Scour Critical — Countermeasures Installed Good 1984 982
MUNGER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1972 966
Chehulpum Oregon Scour Critical — Countermeasures Installed Fair 1957 962
WALLOWA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1957 960
HURRICANE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 959
OAK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1965 952
DEER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1980 936
LAKE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 929
WILLOW CREEK Oregon Scour Critical — Countermeasures Installed Fair 1921 927
JOHN DAY R(MOORES XING) Oregon Scour Critical — Countermeasures Installed Good 1964 927
JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 911
Oneonta Gorge Creek Oregon Scour Critical — Countermeasures Installed Fair 1948 901
S F JOHN DAY R. DAYVILLE Oregon Scour Critical — Countermeasures Installed Fair 1967 900
PINE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1937 898
PUDDING RIVER Oregon Scour Critical — Countermeasures Installed Good 1978 897
LITTLE RIVER Oregon Scour Critical — Countermeasures Installed Good 1981 894
NOEL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1983 892
UMATILLA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1986 889
S FK COQUILLE R (WHITE) Oregon Scour Critical — Countermeasures Installed Good 1966 885
RATTLESNAKE CREEK Oregon Scour Critical — Countermeasures Installed Good 1979 884
SLICK ROCK CREEK Oregon Scour Critical — Countermeasures Installed Good 1963 883
SNAKE RIVER (ADRIAN) Oregon Scour Critical — Countermeasures Installed Fair 1973 882
McTimmonds Creek Oregon Scour Critical — Countermeasures Installed Poor 1967 879
NESTUCCA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1986 874
CANYON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 871
TILLAMOOK RV Oregon Scour Critical — Countermeasures Installed Fair 2003 863
JIM HUNT CREEK Oregon Scour Critical — Countermeasures Installed Fair 1957 846
WILLAMINA CREEK Oregon Scour Critical — Countermeasures Installed Fair 1985 844
MILTON CREEK Oregon Scour Critical — Countermeasures Installed Good 1985 843
CHENEY CREEK Oregon Scour Critical — Countermeasures Installed Good 1973 843
BROWNING CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 842
MOHAWK RIVER Oregon Scour Critical — Countermeasures Installed Fair 1984 838

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.