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 |
|---|---|---|---|---|---|
| Calapooia River | Oregon | Scour Critical — Countermeasures Installed | Fair | 1937 | 3,351 |
| Mid. Fk. Coquille River | Oregon | Scour Critical — Countermeasures Installed | Fair | 1962 | 3,336 |
| Mid. Fk. Coquille River | Oregon | Scour Critical — Countermeasures Installed | Fair | 1962 | 3,336 |
| Mid. Fk. Coquille River | Oregon | Scour Critical — Countermeasures Installed | Fair | 1962 | 3,336 |
| NORTH FORK ASH CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1922 | 3,329 |
| Clear Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1931 | 3,317 |
| SILVER CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1929 | 3,310 |
| HAWN CREEK | Oregon | Scour Critical — Countermeasures Installed | Poor | 1964 | 3,288 |
| SHELTON DITCH | Oregon | Scour Critical — Countermeasures Installed | Fair | 1959 | 3,278 |
| N FK LITTLE BUTTE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1968 | 3,276 |
| ROW RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1969 | 3,263 |
| TRAIL CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1958 | 3,256 |
| LINK RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1926 | 3,241 |
| E FORK BIRCH CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1940 | 3,218 |
| Beaver Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1968 | 3,196 |
| LITTLE APPLEGATE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 2006 | 3,191 |
| WILSON RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1974 | 3,183 |
| Chehulpum Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1919 | 3,115 |
| SHOTGUN CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 3,106 |
| WOLF CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1940 | 3,071 |
| COAST FK WILLAMETTE R | Oregon | Scour Critical — Countermeasures Installed | Fair | 1965 | 3,020 |
| Big Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1931 | 3,003 |
| RICKREALL CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1965 | 3,001 |
| MCNEIL CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1955 | 2,994 |
| OAK CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1958 | 2,987 |
| Palmer Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1984 | 2,939 |
| SARDINE CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1938 | 2,931 |
| S FK SCAPPOOSE CREEK | Oregon | Scour Critical — Countermeasures Installed | Poor | 1957 | 2,926 |
| SANDY CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1979 | 2,925 |
| COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,925 |
| Mid. Fk. Coquille River | Oregon | Scour Critical — Countermeasures Installed | Fair | 1962 | 2,925 |
| COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,925 |
| Tenmile Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1931 | 2,922 |
| Willow Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,909 |
| JOHNSON CREEK | Oregon | Scour Critical — Countermeasures Installed | Poor | 1930 | 2,901 |
| BEAR CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1958 | 2,900 |
| FERN CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,893 |
| MIDDLE FK COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Good | 1984 | 2,879 |
| HOLMES CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1984 | 2,879 |
| MIDDLE FK COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1976 | 2,879 |
| COQUILLE RIVER MIDDLE FK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1976 | 2,879 |
| MIDDLE FK COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1984 | 2,879 |
| MIDDLE FK COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1983 | 2,879 |
| MIDDLE FK COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1984 | 2,879 |
| MIDDLE FK COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Good | 1984 | 2,879 |
| JUMPOFF JOE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1940 | 2,871 |
| POWDER R (HUGHES LN) | Oregon | Scour Critical — Countermeasures Installed | Good | 1966 | 2,854 |
| BEECH CR(MT VERNON) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1956 | 2,836 |
| SOUTH YAMHILL RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1970 | 2,809 |
| CATHERINE CR (DAVIS DAM) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1966 | 2,801 |
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.