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 |
|---|---|---|---|---|---|
| OLD LONG TOM CHANNEL | Oregon | Scour Critical — Countermeasures Installed | Fair | 1981 | 838 |
| SALMON CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1966 | 838 |
| NEAL CREEK | Oregon | Scour Critical — Countermeasures Installed | Poor | 1975 | 838 |
| LONG TOM RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1978 | 832 |
| MCDOWELL CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1958 | 824 |
| AMAZON CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1969 | 819 |
| ROCK CR. (PICTURE GORGE) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1941 | 814 |
| CROOKS CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1972 | 805 |
| TEN MILE CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1963 | 797 |
| BEAVER CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1979 | 793 |
| UPRR & GRANDE RONDE R | Oregon | Scour Critical — Countermeasures Installed | Fair | 1960 | 790 |
| SLOUGH | Oregon | Scour Critical — Countermeasures Installed | Good | 1977 | 786 |
| BRUSH CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1969 | 772 |
| MILL CREEK | Oregon | Scour Critical — Countermeasures Installed | Poor | 1941 | 770 |
| USRS FEED CANAL (ECHO) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1980 | 765 |
| Scott Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1949 | 764 |
| B-53 X CRYSTAL SPRINGS | Oregon | Scour Critical — Countermeasures Installed | Fair | 1955 | 762 |
| DEADMAN CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 2005 | 762 |
| BEAVER CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1918 | 759 |
| MAXFIELD CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1964 | 750 |
| West Fork Drift Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1949 | 747 |
| ESLICK CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1983 | 746 |
| YAMHILL RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1960 | 742 |
| CHEWAUCAN RIVER GRAVEL | Oregon | Scour Critical — Countermeasures Installed | Fair | 1965 | 738 |
| DEBRICK SLOUGH | Oregon | Scour Critical — Countermeasures Installed | Fair | 1988 | 738 |
| BENSON CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1957 | 732 |
| Ford Creek | Oregon | Scour Critical — Countermeasures Installed | Good | 2006 | 729 |
| DRIFT CREEK | Oregon | Scour Critical — Countermeasures Installed | Poor | 1964 | 725 |
| PUDDING RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1958 | 725 |
| BEAVER CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1958 | 725 |
| COW CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1986 | 724 |
| MUDDY CREEK OVERFLOW | Oregon | Scour Critical — Countermeasures Installed | Good | 1960 | 723 |
| Panther Creek | Oregon | Scour Critical — Countermeasures Installed | Poor | 1957 | 717 |
| EAGLE CRK (RICHLAND) | Oregon | Scour Critical — Countermeasures Installed | Fair | 1925 | 712 |
| Lake Creek Overflow | Oregon | Scour Critical — Countermeasures Installed | Fair | 1960 | 697 |
| DAIRY CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1984 | 694 |
| SLOUGH | Oregon | Scour Critical — Countermeasures Installed | Fair | 1983 | 675 |
| UPPER BEAR CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1959 | 675 |
| SOUTH BEAVER CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 2007 | 675 |
| B-56 OVER JOHNSON CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1934 | 674 |
| LEWIS & CLARK RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1958 | 671 |
| WILLOW CREEK EB | Oregon | Scour Critical — Countermeasures Installed | Poor | 1958 | 670 |
| Lake Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1960 | 669 |
| Swamp Creek | Oregon | Scour Critical — Countermeasures Installed | Fair | 1960 | 669 |
| NORTH FORK ASH CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1998 | 663 |
| E FORK HOOD RIVER | Oregon | Scour Critical — Countermeasures Installed | Fair | 1969 | 660 |
| DRY CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1966 | 645 |
| EMILE CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 2005 | 643 |
| JUMPOFF JOE CREEK | Oregon | Scour Critical — Countermeasures Installed | Good | 1977 | 640 |
| BRYAN CREEK | Oregon | Scour Critical — Countermeasures Installed | Fair | 1970 | 635 |
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.