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 |
|---|---|---|---|---|---|
| COW CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1944 | 2,053 |
| SUCCOR CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1975 | 2,049 |
| MOLALLA RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1930 | 2,038 |
| SILK CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1982 | 2,025 |
| N FK SCAPPOOSE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1956 | 2,014 |
| N FK SCAPPOOSE CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1959 | 1,967 |
| N UMPQUA RV (LONE ROCK) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1954 | 1,942 |
| Trask Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1963 | 1,942 |
| Agency Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1929 | 1,934 |
| JUMPOFF JOE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1959 | 1,930 |
| MARYS RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 1,929 |
| GRANDE RONDE R(NE ELGIN) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1935 | 1,911 |
| ALTHOUSE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1962 | 1,910 |
| INDIAN CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1939 | 1,893 |
| JOHN DAY R(PRAIRIE CITY) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1939 | 1,893 |
| JORDAN CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1985 | 1,882 |
| PINE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1960 | 1,863 |
| OWYHEE RIVER (ROME) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1936 | 1,862 |
| SILVIES RIVER(3RD BR) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1971 | 1,858 |
| SILVIES SLOUGH(4TH BR) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1971 | 1,858 |
| SOUTH SANTIAM RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1961 | 1,854 |
| N FORK CHETCO RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1952 | 1,848 |
| EAST BIRCH CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1930 | 1,845 |
| Hood River | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 1,837 |
| MCKENZIE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1968 | 1,833 |
| TAYLOR CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1992 | 1,824 |
| EDSON CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1959 | 1,791 |
| Jordan Creek | Oregon | Scour Critical — Countermeasures Installed | Poor | 1963 | 1,786 |
| HERMAN CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1979 | 1,775 |
| GALICE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1954 | 1,774 |
| BLACK CANYON CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1959 | 1,772 |
| PULASKI CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1977 | 1,767 |
| FAT ELK CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1977 | 1,767 |
| MOSBY CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1979 | 1,766 |
| MALHEUR R (DIVERSION) | Oregon | Scour Critical — Countermeasures Installed | Fair | 2004 | 1,764 |
| YELLOW CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1934 | 1,757 |
| WALLOWA RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 1,754 |
| HURRICANE CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1964 | 1,754 |
| MOHAWK RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1981 | 1,732 |
| SILVIES SLOUGH(6TH BR) | Oregon | Scour Critical — Countermeasures Installed | Good | 1971 | 1,729 |
| SILVIES SLOUGH(9TH BR) | Oregon | Scour Critical — Countermeasures Installed | Good | 1971 | 1,729 |
| Louie Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1962 | 1,724 |
| Louie Creek | Oregon | Scour Critical — Countermeasures Installed | Poor | 1962 | 1,724 |
| SLATE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1956 | 1,720 |
| B-91 OVER JOHNSON CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1982 | 1,719 |
| ROBERTS CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1978 | 1,717 |
| JUMPOFF JOE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1955 | 1,710 |
| Lost Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1961 | 1,701 |
| MILK CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1959 | 1,699 |
| COYOTE CREEK OFLOW | Oregon | Scour Critical — Countermeasures Installed | Fair | 1969 | 1,688 |
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.