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
FOSSIL CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1934	1,283
GLACIER CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1956	1,283
COAL CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1971	1,283
EARLY WINTERS CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1964	1,280
PERRY CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1958	1,273
E FOSTER CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1950	1,239
E FOSTER CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1950	1,239
W FOSTER CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1950	1,239
ALDER CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1937	1,200
CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1937	1,200
CINEBAR CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1946	1,200
N FK SNOQUALMIE R	Washington	Scour Critical — Countermeasures Installed	Poor	1951	1,200
WILSON CR	Washington	Scour Critical — Countermeasures Installed	Fair	1947	1,181
WADDELL CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1969	1,164
BRADEN CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1931	1,151
LAKE CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1950	1,112
COWLITZ RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1949	1,109
PUGET SOUND @ TAHLEQUAH	Washington	Scour Critical — Countermeasures Installed	Fair	1994	1,106
KALALOCH CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1930	1,079
DESCHUTES RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1956	1,079
POSSESSION SOUND	Washington	Scour Critical — Countermeasures Installed	Good	2003	1,078
CONNOR CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1975	1,007
DELEZENNE CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1971	1,007
STILLWATER CR	Washington	Scour Critical — Countermeasures Installed	Good	1963	994
KALAMA RIVER	Washington	Scour Critical — Countermeasures Installed	Good	1952	975
SULLIVAN CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1927	949
BOISE CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1956	947
BUCK CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1960	923
COLUMBIA RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1948	904
MILK CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1939	881
BULLMAN CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1960	881
MILL CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1971	879
WYNOOCHEE RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1969	861
DESCHUTES RIVER	Washington	Scour Critical — Countermeasures Installed	Good	1982	851
E TWIN R	Washington	Scour Critical — Countermeasures Installed	Good	1952	841
NO.FK NEWAUKUM RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1960	839
N BRANCH CHELATCHIE CR	Washington	Scour Critical — Countermeasures Installed	Poor	1953	838
MATNEY CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1930	814
MIDDLE BR WILDCAT CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1951	804
MIDDLE BRANCH WILDCAT CK	Washington	Scour Critical — Countermeasures Installed	Poor	1951	804
NORTH FORK	Washington	Scour Critical — Countermeasures Installed	Fair	1930	800
KALAMA RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1958	795
NEWAUKUM RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1970	750
ELOCHOMAN RIVER	Washington	Scour Critical — Countermeasures Installed	Good	1963	726
MISSION CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1960	725
SAN POIL R	Washington	Scour Critical — Countermeasures Installed	Poor	1931	705
MOX CHEHALIS CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1966	685
NEWAUKUM RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1973	674
SALMON CREEK	Washington	Scour Critical — Countermeasures Installed	Good	2020	659
N FORK NOOKSACK RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1957	649

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.

All Bridges Poor Condition Historic Bridges Bridge Stats