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.

Clear

Bridge	State	Scour Status	Condition	Year Built	ADT
South Fork Ash Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1950	9,615
Luckiamute River	Oregon	Scour Critical — Countermeasures Installed	Fair	1954	9,582
West Fork Dairy Creek	Oregon	Scour Critical — Countermeasures Installed	Poor	1940	9,574
MALHEUR RIVER	Oregon	Scour Critical — Countermeasures Installed	Good	1973	9,549
MALHEUR RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1973	9,549
LITTLE DESCHUTES RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1975	9,426
ABERNETHY CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1956	9,270
ABERNETHY CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1956	9,270
UMATILLA R/UPRR/USRS CAN	Oregon	Scour Critical — Countermeasures Installed	Fair	1968	9,213
10TH ST. @ BEAR CR.	Oregon	Scour Critical — Countermeasures Installed	Fair	1960	9,097
W FK Dairy Creek	Oregon	Scour Critical — Countermeasures Installed	Good	1941	8,934
LOWER LOOKINGGLASS CRK	Oregon	Scour Critical — Countermeasures Installed	Fair	1949	8,853
OSWEGO CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1930	8,805
ROGUE RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	2006	8,744
Trask River	Oregon	Scour Critical — Countermeasures Installed	Fair	1949	8,740
TUALATIN RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1924	8,728
WHETSTONE CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1953	8,668
MILL CREEK	Oregon	Scour Critical — Countermeasures Installed	Poor	1975	8,665
SHELTON DITCH	Oregon	Scour Critical — Countermeasures Installed	Fair	1954	8,475
North Fork Wolf Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1938	8,468
Flat Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1933	8,459
Big Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1951	8,456
REESE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1921	8,367
Slick Rock Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1930	8,356
INDIAN CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1921	8,331
Little N. Fk. Santiam R.	Oregon	Scour Critical — Countermeasures Installed	Fair	1952	8,303
REEVES CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1926	8,286
PRINGLE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1930	8,251
Deep Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1948	8,140
MT SCOTT CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	2001	8,094
LONG TOM RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1988	8,068
DEER CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1964	8,066
ANDERSON CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1927	8,038
Ash Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1981	7,883
SOUTH UMPQUA OVERFLOW	Oregon	Scour Critical — Countermeasures Installed	Good	1963	7,879
WATERS CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1927	7,878
SLATE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1927	7,878
SLATE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1927	7,878
BUTCHER KNIFE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1927	7,878
Plympton Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	7,845
DIXON CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1981	7,698
JOHNSON CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1938	7,673
DESCHUTES RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1934	7,631
SOUTH UMPQUA OVERFLOW	Oregon	Scour Critical — Countermeasures Installed	Good	1963	7,548
Santiam River OFlow #4	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	7,541
Courtney Creek	Oregon	Scour Critical — Countermeasures Installed	Good	1983	7,403
Senecal Creek	Oregon	Scour Critical — Countermeasures Installed	Good	1985	7,340
NECANICUM RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1963	7,315
Butte Creek Oflow	Oregon	Scour Critical — Countermeasures Installed	Fair	1969	7,302
ROGUE RIVER (WEDDERBURN)	Oregon	Scour Critical — Countermeasures Installed	Fair	1930	7,286

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.

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