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
WALL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1969 31
DRAINAGE DITCH Oregon Scour Critical — Countermeasures Installed Fair 1973 31
BURNT R Oregon Scour Critical — Countermeasures Installed Fair 1970 30
JOHN DAY R(WIDOWS CR BR) Oregon Scour Critical — Countermeasures Installed Fair 1980 29
DEEP CREEK Oregon Scour Critical — Countermeasures Installed Fair 1977 28
SPRUCE RUN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1987 28
NO. FK. ALSEA RIVER Oregon Scour Critical — Countermeasures Installed Good 1970 27
INDIAN CREEK Oregon Scour Critical — Countermeasures Installed Poor 1922 27
EIGHTMILE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1914 26
NEAL CR Oregon Scour Critical — Countermeasures Installed Good 1972 26
Rock Creek Oregon Scour Critical — Countermeasures Installed Good 2009 25
S.FORK LONG CREEK Oregon Scour Critical — Countermeasures Installed Fair 1967 21
LONG CREEK Oregon Scour Critical — Countermeasures Installed Poor 1974 21
WASSON CANYON CREEK Oregon Scour Critical — Countermeasures Installed Fair 1969 20
TYGH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1975 16
WILLOW CR Oregon Scour Critical — Countermeasures Installed Fair 1948 16
N FK BURNT R (RICE ROAD) Oregon Scour Critical — Countermeasures Installed Fair 1986 15
COPPLE CREEK Oregon Scour Critical — Countermeasures Installed Fair 2005 15
DEADWOOD CREEK Oregon Scour Critical — Countermeasures Installed Fair 1932 15
DOUGHERTY SLOUGH Oregon Scour Critical — Countermeasures Installed Poor 1989 15
Shutter Creek Oregon Scour Critical — Countermeasures Installed Fair 2008 14
SUTHERLIN CREEK Oregon Scour Critical — Countermeasures Installed Fair 1987 13
HAY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1964 13
CRANE CREEK Oregon Scour Critical — Countermeasures Installed Fair 2005 12
CRANE CREEK Oregon Scour Critical — Countermeasures Installed Fair 2005 12
Jordan Cr. Oregon Scour Critical — Countermeasures Installed Fair 1961 11
WILLOW CREEK EB Oregon Scour Critical — Countermeasures Installed Good 1987 10
Sun Creek Oregon Scour Critical — Countermeasures Installed Good 1900 10
PUZZLE CR Oregon Scour Critical — Countermeasures Installed Poor 1954 5
BERRY CREEK DAM SPILLWAY Oregon Scour Critical — Countermeasures Installed Fair 1979 4
BEECH CRK (FRNTG RD) Oregon Scour Critical — Countermeasures Installed Fair 1993 1

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.