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
VALE MAIN CANAL	Oregon	Scour Critical — Countermeasures Installed	Poor	1978	140
NEHALEM RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1979	138
N FK SCAPPOOSE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	2007	138
JOHNSON CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1939	137
CLEAR CR (SLAUGHTER RD)	Oregon	Scour Critical — Countermeasures Installed	Good	1965	136
LT FK FOOTS CR/	Oregon	Scour Critical — Countermeasures Installed	Fair	1968	135
SAMS CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1960	133
FIFTEENMILE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1952	133
PINE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1961	130
B-48 OVER KELLY CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1974	128
LITTLE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1949	128
BEAVER CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1956	125
LOUSIGNONT CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1994	125
FAWCETT CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1973	124
CATHERINE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1977	124
JOHN DAY RIVER	Oregon	Scour Critical — Countermeasures Installed	Good	1949	123
DEER CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1966	123
BIG ELK CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1955	123
East Fork Coquille River	Oregon	Scour Critical — Countermeasures Installed	Good	2005	123
SILVIES RIVER	Oregon	Scour Critical — Countermeasures Installed	Good	1979	123
HOFFMAN CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1986	123
ROCK CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1980	120
NORTH YAMHILL RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1956	119
CARBERRY CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1965	119
BURNT R	Oregon	Scour Critical — Countermeasures Installed	Good	1962	117
SILK CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1987	117
Santiam Overflow No. 1	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	116
UPRR AND MEACHAM CRK	Oregon	Scour Critical — Countermeasures Installed	Poor	1925	115
TIDE CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	2007	115
SIUSLAW RIVER	Oregon	Scour Critical — Countermeasures Installed	Good	1983	112
WILDCAT CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1983	112
CANYON CREEK	Oregon	Scour Critical — Countermeasures Installed	Poor	1972	111
WILLOW CREEK EB	Oregon	Scour Critical — Countermeasures Installed	Good	1985	110
OVERFLOW	Oregon	Scour Critical — Countermeasures Installed	Good	1993	110
BADGER CREEK	Oregon	Scour Critical — Countermeasures Installed	Poor	1960	109
LOUNSBERRY CREEK	Oregon	Scour Critical — Countermeasures Installed	Good	1966	108
Calapooya CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1959	108
MILL CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1963	108
STILL CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1971	107
SALMONBERRY RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1964	106
MILL CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1975	106
SPRAGUE RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	105
LONE PINE/MIDDLE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1965	104
FIVE RIVERS	Oregon	Scour Critical — Countermeasures Installed	Fair	1958	104
MENDENHALL CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1926	104
BAKER CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1978	104
COW CREEK	Oregon	Scour Critical — Countermeasures Installed	Poor	1951	103
ALSEA RIVER	Oregon	Scour Critical — Countermeasures Installed	Poor	1945	102
LAKE CREEK	Oregon	Scour Critical — Countermeasures Installed	Fair	1959	100
TILLAMOOK RIVER	Oregon	Scour Critical — Countermeasures Installed	Fair	2024	100

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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