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
EIGHTMILE CREEK Oregon Scour Critical — Countermeasures Installed Good 2021 239
MALHEUR RIVER Oregon Scour Critical — Countermeasures Installed Fair 1973 234
POWDER RIVER (MILES) Oregon Scour Critical — Countermeasures Installed Good 1986 232
W FORK DRY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1987 232
BRUNSWICK CREEK Oregon Scour Critical — Countermeasures Installed Good 1997 231
MCKAY CREEK Oregon Scour Critical — Countermeasures Installed Good 1997 231
CATHERINE CREEK (PARK) Oregon Scour Critical — Countermeasures Installed Fair 1940 230
EMIGRANT CREEK Oregon Scour Critical — Countermeasures Installed Fair 1966 230
NORTH PINE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1958 229
MOSIER CREEK Oregon Scour Critical — Countermeasures Installed Poor 1950 229
POWDER R (SNAKE RIVER RD Oregon Scour Critical — Countermeasures Installed Good 1959 226
HURRICANE CREEK Oregon Scour Critical — Countermeasures Installed Poor 1960 220
SILETZ RIVER Oregon Scour Critical — Countermeasures Installed Fair 1961 220
GRANDE RONDE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1975 220
CANYON CREEK Oregon Scour Critical — Countermeasures Installed Good 2001 219
HAYSTACK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1977 218
BAKER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1968 218
SIUSLAW RIVER Oregon Scour Critical — Countermeasures Installed Good 1986 218
N FK BIG BUTTE CR. Oregon Scour Critical — Countermeasures Installed Poor 1975 218
SWEETS CREEK Oregon Scour Critical — Countermeasures Installed Fair 1971 217
WILLOW CREEK EB Oregon Scour Critical — Countermeasures Installed Fair 1980 217
SILVIES RIVER Oregon Scour Critical — Countermeasures Installed Fair 1958 217
BRUSH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1955 216
LUCKIAMUTE RIVER Oregon Scour Critical — Countermeasures Installed Good 1956 214
Cedar Creek Oregon Scour Critical — Countermeasures Installed Good 2008 214
COLD SPRINGS CREEK Oregon Scour Critical — Countermeasures Installed Good 1985 213
DEER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1967 213
MUDDY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1968 210
HUNTERS CREEK Oregon Scour Critical — Countermeasures Installed Fair 1959 208
WEST FORK DAIRY CREEK Oregon Scour Critical — Countermeasures Installed Poor 1961 208
LITTLE APPLEGATE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1955 208
Yaquina River Oregon Scour Critical — Countermeasures Installed Poor 1941 206
MALHEUR RIVER Oregon Scour Critical — Countermeasures Installed Fair 1986 206
SPRAGUE RIVER Oregon Scour Critical — Countermeasures Installed Good 1984 205
WALLOWA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1956 203
ROBERTSON CREEK Oregon Scour Critical — Countermeasures Installed Fair 2006 203
WOLF CREEK Oregon Scour Critical — Countermeasures Installed Fair 1921 201
MURPHY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1965 201
SWING LOG CREEK Oregon Scour Critical — Countermeasures Installed Fair 1977 200
PARRISH CREEK Oregon Scour Critical — Countermeasures Installed Fair 1973 200
WILDHORSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1924 200
BIG ELK CREEK Oregon Scour Critical — Countermeasures Installed Poor 1958 200
MID FK COLD SPRINGS CRK Oregon Scour Critical — Countermeasures Installed Good 1991 200
Washout Creek Oregon Scour Critical — Countermeasures Installed Fair 1996 200
Potts Creek Oregon Scour Critical — Countermeasures Installed Good 1980 200
N Fork Calapooia River Oregon Scour Critical — Countermeasures Installed Good 1977 200
WILLOW CREEK EB Oregon Scour Critical — Countermeasures Installed Good 1974 197
NEHALEM RIVER Oregon Scour Critical — Countermeasures Installed Fair 1980 194
WILLOW CREEK Oregon Scour Critical — Countermeasures Installed Fair 1979 193
MID FK COLD SPRINGS CRK Oregon Scour Critical — Countermeasures Installed Fair 1955 193

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.