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.
| 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 — Unaddressed | Bridge is scour critical with no countermeasures installed. The foundation is vulnerable and no protective action has been taken. |
| Code 3 — Countermeasures Installed | Protective measures (riprap, sheet piling, etc.) have been installed to reduce scour risk, but the bridge remains classified as scour critical. |
| Code 6 — Countermeasures Ineffective | Protective 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.