Scour Critical Bridges in Washington

516 bridges in Washington 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 516 bridges in Washington have been identified as vulnerable to scour damage.

Clear

Bridge	State	Scour Status	Condition	Year Built	ADT
SLIPPERY CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1967	1,907
RIBARY CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1989	1,900
CHERRY CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1951	1,877
KEYSTONE HARBOR	Washington	Scour Critical — Countermeasures Installed	Fair	1979	1,863
WILDCAT CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1921	1,863
WILDCAT CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1921	1,863
KAPOWSIN CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1920	1,850
METHOW RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1933	1,847
METHOW RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1939	1,847
METHOW RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1939	1,847
BLACK CANYON CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1949	1,847
METHOW RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1950	1,847
WENATCHEE RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1940	1,805
PUGET SND @ PT TOWNSEND	Washington	Scour Critical — Countermeasures Installed	Good	2013	1,800
SHAW CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1957	1,786
FRYINGPAN CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1931	1,786
N FK GREEN CR	Washington	Scour Critical — Countermeasures Installed	Good	1960	1,785
MILL CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1960	1,721
CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1936	1,719
FALLS CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1957	1,719
MARION DRAIN CANAL	Washington	Scour Critical — Countermeasures Installed	Good	1956	1,704
SATUS CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1956	1,704
SOUTH DRAIN	Washington	Scour Critical — Countermeasures Installed	Good	1956	1,704
CHEHALIS RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1991	1,697
GOODELL CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1972	1,696
SCHWEITZER CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1952	1,666
LAKE CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1966	1,651
PALOUSE RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1971	1,646
FERN CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1962	1,600
OSTRANDER CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1962	1,600
ELK CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1973	1,598
ENTIAT RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1941	1,583
METHOW RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1935	1,578
METHOW RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1939	1,578
CHERRY CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1947	1,561
METHOW RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1984	1,478
WHITE CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1974	1,475
SAUK RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1958	1,475
LOWER WILSON CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1932	1,474
SILVER CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1922	1,454
S. FORK NEWAUKUM RIVER	Washington	Scour Critical — Countermeasures Installed	Good	1956	1,424
CHEHALIS RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1976	1,409
SOUTH TOUTLE RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1971	1,400
CLOQUALLUM CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1915	1,380
SALMON CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1923	1,368
WRECK CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1957	1,356
UPRIGHT CHANNEL	Washington	Scour Critical — Countermeasures Installed	Fair	1981	1,349
TEANAWAY RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1930	1,338
COAL CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1949	1,324
SKYKOMISH RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1961	1,321

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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