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
BEAR CR	Oregon	Scour Critical — Countermeasures Installed	Good	1961	20,832
BEAR CR	Oregon	Scour Critical — Countermeasures Installed	Good	1962	20,818
BEAR CR	Oregon	Scour Critical — Countermeasures Installed	Good	1962	20,818
Little Muddy Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	20,693
Little Muddy Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	20,693
Muddy Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1959	20,693
Muddy Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1959	20,693
Hess Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	20,200
ROCK CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1985	20,132
ROGUE RIVER (HOMESTEAD)	Oregon	Scour Critical — Countermeasures Installed	Fair	1961	19,847
ROGUE RIVER (HOMESTEAD)	Oregon	Scour Critical — Countermeasures Installed	Fair	1961	19,847
Creek	Oregon	Scour Critical — Countermeasures Installed	Good	1992	19,591
SHELTON DITCH	Oregon	Scour Critical — Countermeasures Installed	Fair	1975	19,501
Oak Creek	Oregon	Scour Critical — Countermeasures Installed	Good	1988	19,406
ROGUE RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1960	19,047
CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1961	19,034
CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1956	19,034
ROGUE RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1931	18,505
NYBERG CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1980	18,383
ROCK CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1957	17,900
13th & Shelton Ditch	Oregon	Scour Critical — Countermeasures Installed	Good	1988	17,817
CLEAR CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1957	17,600
South Yamhill River	Oregon	Scour Critical — Countermeasures Installed	Good	1992	17,452
Shangri La Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1960	16,793
Willamette River	Oregon	Scour Critical — Countermeasures Installed	Fair	1925	16,759
B-90 OVER JOHNSON CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1927	16,718
ALDER CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	2005	16,683
SANDY RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1964	16,500
HOOD RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1962	16,493
HOOD RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1953	16,493
Deer Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1941	16,492
South Yamhill River	Oregon	Scour Critical — Countermeasures Installed	Fair	1946	16,482
Muddy Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1978	16,258
CREEK FRONTAGE RT	Oregon	Scour Critical — Countermeasures Installed	Good	1959	16,064
CREEK FRONTAGE RT	Oregon	Scour Critical — Countermeasures Installed	Good	1959	16,064
B-80A OVER JOHNSON CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1971	16,018
LITTLE BUTTE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1981	15,897
Jackson Creek	Oregon	Scour Critical — Countermeasures Installed	Good	1919	15,894
DEEP CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1957	15,600
Pudding River	Oregon	Scour Critical — Countermeasures Installed	Fair	1922	15,402
B-136 X COLUMBIA SLOUGH	Oregon	Scour Critical — Countermeasures Installed	Fair	1992	15,271
South Yamhill River	Oregon	Scour Critical — Countermeasures Installed	Fair	1963	15,252
Bowers Slough	Oregon	Scour Critical — Countermeasures Installed	Fair	1964	15,140
Middle Creek Ash Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1954	14,546
Necanicum River	Oregon	Scour Critical — Countermeasures Installed	Fair	1930	14,464
PUDDING RIVER OVERFLOW	Oregon	Scour Critical — Countermeasures Installed	Fair	1985	14,416
PUDDING RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1979	14,416
DEER CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1937	14,285
Schooner Creek	Oregon	Scour Critical — Countermeasures Installed	Fair	1945	14,212
North Fork Ash Creek	Oregon	Scour Critical — Countermeasures Installed	Poor	1954	14,149

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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