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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
SIUSLAW RIVER Oregon Scour Critical — Countermeasures Installed Fair 1984 318
Nehalem River Oregon Scour Critical — Countermeasures Installed Fair 1956 317
EVANS CR./ANTIOCH RD. Oregon Scour Critical — Countermeasures Installed Fair 1960 313
FLAT CREEK Oregon Scour Critical — Countermeasures Installed Good 1978 313
LONG TOM RIVER Oregon Scour Critical — Countermeasures Installed Fair 1962 312
GRAVE CREEK Oregon Scour Critical — Countermeasures Installed Good 1975 311
HOG CREEK/MTN. VIEW DR. Oregon Scour Critical — Countermeasures Installed Fair 1959 309
BOULDER CREEK Oregon Scour Critical — Countermeasures Installed Good 1954 309
WILLAMETTE RIVER OFLOW Oregon Scour Critical — Countermeasures Installed Good 1984 307
MARSHALL SLOUGH Oregon Scour Critical — Countermeasures Installed Fair 1978 307
N FK SCAPPOOSE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1978 302
Clack Rvr. (Cripple Cr.) Oregon Scour Critical — Countermeasures Installed Fair 1952 299
CLACK RVR. (WHITE WATER) Oregon Scour Critical — Countermeasures Installed Fair 1952 299
CALAPOOIA RIVER Oregon Scour Critical — Countermeasures Installed Poor 1962 299
GOOSENECK CREEK Oregon Scour Critical — Countermeasures Installed Fair 1966 291
ANTELOPE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1965 290
LITTLE RIVER Oregon Scour Critical — Countermeasures Installed Fair 1943 290
EAST FORK WILLIAMS CREEK Oregon Scour Critical — Countermeasures Installed Fair 1935 289
CHERRY CREEK Oregon Scour Critical — Countermeasures Installed Fair 1967 289
SANDY RIVER Oregon Scour Critical — Countermeasures Installed Poor 1953 288
RHEA CREEK Oregon Scour Critical — Countermeasures Installed Fair 1935 288
WILLOW CREEK EB Oregon Scour Critical — Countermeasures Installed Poor 1965 286
WILLOW CREEK EB Oregon Scour Critical — Countermeasures Installed Poor 1966 286
HASKINS CREEK Oregon Scour Critical — Countermeasures Installed Poor 1967 284
STEEL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1985 284
JACKSON CR/JACKSON RESV Oregon Scour Critical — Countermeasures Installed Good 1986 282
UMATILLA RIVER Oregon Scour Critical — Countermeasures Installed Fair 1953 281
FIVE MILE CREEK Oregon Scour Critical — Countermeasures Installed Good 1985 279
DUBOIS CREEK Oregon Scour Critical — Countermeasures Installed Good 1980 279
NEAL CR Oregon Scour Critical — Countermeasures Installed Fair 1948 278
LIEBRE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1984 274
LAKE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1928 273
COYOTE CREEK Oregon Scour Critical — Countermeasures Installed Fair 1922 273
WILLOW CR Oregon Scour Critical — Countermeasures Installed Fair 1977 264
LEWIS & CLARK RIVER Oregon Scour Critical — Countermeasures Installed Fair 1957 263
HUMBUG CREEK Oregon Scour Critical — Countermeasures Installed Fair 1972 263
LITTLE DESCHUTES RIVER Oregon Scour Critical — Countermeasures Installed Good 1989 263
WEST FORK SALT CREEK Oregon Scour Critical — Countermeasures Installed Good 1988 261
NORTHRUP CREEK Oregon Scour Critical — Countermeasures Installed Fair 1986 261
COYOTE CREEK Oregon Scour Critical — Countermeasures Installed Good 1988 261
ROCK CREEK Oregon Scour Critical — Countermeasures Installed Good 1980 252
N FORK JOHN DAY RIVER Oregon Scour Critical — Countermeasures Installed Fair 1938 251
WEST FORK HOOD RIVER Oregon Scour Critical — Countermeasures Installed Fair 1965 251
S FORK LITTLE BUTTE CR. Oregon Scour Critical — Countermeasures Installed Good 1986 251
MALHEUR RIVER Oregon Scour Critical — Countermeasures Installed Fair 1979 249
MILL CREEK Oregon Scour Critical — Countermeasures Installed Fair 1967 246
NORTH YAMHILL RIVER Oregon Scour Critical — Countermeasures Installed Fair 1972 244
MOSIER CREEK Oregon Scour Critical — Countermeasures Installed Poor 1950 244
ANTELOPE CREEK Oregon Scour Critical — Countermeasures Installed Good 1966 239
BAKER CREEK Oregon Scour Critical — Countermeasures Installed Fair 1962 239

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