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 |
|---|---|---|---|---|---|
| EAGLE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1952 | 2,781 |
| LONG TOM RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1978 | 2,746 |
| Beaver Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1966 | 2,725 |
| CUNNINGHAM CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 2005 | 2,717 |
| COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,715 |
| COQUILLE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1965 | 2,715 |
| Beaver Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1936 | 2,713 |
| SALT CREEK | Oregon | Scour Critical — Countermeasures Installed | Poor | 1965 | 2,706 |
| N FK SCAPPOOSE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1957 | 2,700 |
| BEAR TRAP CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1955 | 2,681 |
| BRUSH CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1955 | 2,681 |
| WARD CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1984 | 2,652 |
| ELK CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1957 | 2,644 |
| ABIQUA CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1954 | 2,635 |
| LOSTINE RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1953 | 2,619 |
| POWELL CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1940 | 2,612 |
| POWDER RIVER (BRIDGE ST) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1933 | 2,551 |
| ASH CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1972 | 2,523 |
| DRY CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,503 |
| LITTLE CREEK (UNION) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1922 | 2,496 |
| MALHEUR RIVER (HOPE) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1966 | 2,470 |
| COFFEE CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1989 | 2,467 |
| JOHNSON CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1970 | 2,436 |
| APPLEGATE R (APPLEGATE) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1934 | 2,419 |
| Rock Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1926 | 2,352 |
| SILVER CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1956 | 2,325 |
| CLACKAMAS RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1970 | 2,268 |
| TAYLOR CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1954 | 2,267 |
| JUMPOFF JOE CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1970 | 2,264 |
| WALLA WALLA RIVER | Oregon | Scour Critical — Countermeasures Installed | Good | 1977 | 2,251 |
| NO FK SCAPPOOSE CR | Oregon | Scour Critical — Countermeasures Installed | Fair | 1954 | 2,250 |
| FOOTS CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1928 | 2,246 |
| South Yamhill River | Oregon | Scour Critical — Countermeasures Installed | Fair | 1929 | 2,224 |
| PLEASANT CR./QUEENS BRCH | Oregon | Scour Critical — Countermeasures Installed | Fair | 1975 | 2,219 |
| ROCK CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1930 | 2,209 |
| N YAMHILL RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1981 | 2,200 |
| ANTELOPE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1973 | 2,156 |
| UPTON SLOUGH | Oregon | Scour Critical — Countermeasures Installed | Fair | 1959 | 2,153 |
| N. FORK BEAVER CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1954 | 2,143 |
| N FK SCAPPOOSE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1959 | 2,124 |
| Depot Slough | Oregon | Scour Critical — Countermeasures Installed | Fair | 1962 | 2,122 |
| PRINGLE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1993 | 2,118 |
| HAY CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1923 | 2,116 |
| DIXIE CRK (PRAIRIE CITY) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1939 | 2,104 |
| CHEHALEM CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1965 | 2,093 |
| TUALATIN RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1977 | 2,060 |
| MARYS RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1961 | 2,060 |
| SO BR QUEENS CR/EVAN RD | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 2,054 |
| BUCKAROO CABIN CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1962 | 2,054 |
| LITTLE SANDY CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1962 | 2,054 |
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.