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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
HWY 1 SB CONN 7 OFF RAMP Oregon Scour Critical — Countermeasures Installed Fair 1963 14,116
JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1935 14,100
Beaver Creek Oregon Scour Critical — Countermeasures Installed Fair 1953 14,067
Little Beaver Creek Oregon Scour Critical — Countermeasures Installed Fair 1953 13,994
SHELTON DITCH Oregon Scour Critical — Countermeasures Installed Fair 1988 13,876
Drift Creek Oregon Scour Critical — Countermeasures Installed Fair 1945 13,759
Willamette River Oregon Scour Critical — Countermeasures Installed Fair 1971 13,386
Kilchis R. & Possetti Rd Oregon Scour Critical — Countermeasures Installed Poor 1952 13,357
MALHEUR RIVER Oregon Scour Critical — Countermeasures Installed Fair 1976 13,346
MILL RACE CANAL Oregon Scour Critical — Countermeasures Installed Good 1961 13,287
WAGNER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1937 12,804
COAST FK WILLAMETTE RIV Oregon Scour Critical — Countermeasures Installed Fair 1953 12,757
Willamette River Oregon Scour Critical — Countermeasures Installed Poor 1913 12,687
Willamette River Oregon Scour Critical — Countermeasures Installed Poor 1964 12,687
SILVER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1974 12,536
WILLAMETTE R RELIEF OPNG Oregon Scour Critical — Countermeasures Installed Fair 1955 12,291
COAST FK WILLAMETTE R Oregon Scour Critical — Countermeasures Installed Fair 1950 12,291
Marys River Oregon Scour Critical — Countermeasures Installed Fair 1954 12,164
FANNO CREEK Oregon Scour Critical — Countermeasures Installed Fair 1971 12,041
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Good 1966 12,026
MCKENZIE OFLOW Oregon Scour Critical — Countermeasures Installed Good 1966 12,026
SALMON RIVER Oregon Scour Critical — Countermeasures Installed Fair 1972 12,006
BURNT RIVER(DIXIE CR) Oregon Scour Critical — Countermeasures Installed Fair 1971 11,968
BURNT RIVER (RR TUNNEL) Oregon Scour Critical — Countermeasures Installed Good 1971 11,958
East Fork Dairy Creek Oregon Scour Critical — Countermeasures Installed Fair 1971 11,858
Bledsoe Creek Oregon Scour Critical — Countermeasures Installed Fair 1971 11,858
Marys River Oregon Scour Critical — Countermeasures Installed Fair 1933 11,781
BOECKMAN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1986 11,613
Johnson CK Oregon Scour Critical — Countermeasures Installed Fair 1968 11,588
JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1949 11,561
EAGLE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1972 11,487
ROCK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1957 11,450
Molalla River Oregon Scour Critical — Countermeasures Installed Fair 1936 11,423
Mollala River Oregon Scour Critical — Countermeasures Installed Fair 1963 11,423
Mill Creek Oregon Scour Critical — Countermeasures Installed Fair 1946 11,358
COX CREEK Oregon Scour Critical — Countermeasures Installed Poor 1940 11,330
DESCHUTES RIVER Oregon Scour Critical — Countermeasures Installed Fair 1962 11,211
LITTLE WALLA WALLA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1948 10,992
Beaver Creek Oregon Scour Critical — Countermeasures Installed Fair 1960 10,913
Willamette River Oregon Scour Critical — Countermeasures Installed Fair 1925 10,393
WAIBLE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1972 10,382
North Yamhill River Oregon Scour Critical — Countermeasures Installed Fair 1921 10,350
OVERFLOW CHANNEL Oregon Scour Critical — Countermeasures Installed Fair 1985 10,265
North Yamhill River Oregon Scour Critical — Countermeasures Installed Fair 1959 10,193
HOLTON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1926 10,152
JOHNSON CREEK Oregon Scour Critical — Countermeasures Installed Good 1985 10,101
South Yamhill River Oregon Scour Critical — Countermeasures Installed Fair 1956 10,099
ASHLAND CREEK Oregon Scour Critical — Countermeasures Installed Fair 1911 9,979
Slough Oregon Scour Critical — Countermeasures Installed Fair 1974 9,803
ABERNETHY CREEK Oregon Scour Critical — Countermeasures Installed Poor 1933 9,700

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