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
COLUMBIA RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1978	9,651
DOUGLAS CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1957	9,626
SLOUGH OF YAKIMA R	Washington	Scour Critical — Countermeasures Installed	Fair	1935	9,615
LIND COULEE	Washington	Scour Critical — Countermeasures Installed	Fair	1954	9,298
SAMMAMISH R	Washington	Scour Critical — Countermeasures Installed	Good	1963	9,203
SOUTH CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1947	9,080
COLUMBIA RIVER VANTAGE	Washington	Scour Critical — Countermeasures Installed	Fair	1962	9,077
LACAMAS CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1957	9,017
PUGET SOUND @ EAGLE HRBR	Washington	Scour Critical — Countermeasures Installed	Fair	1972	9,000
CHIMACUM CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1916	8,718
WENATCHEE RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1929	8,705
WENATCHEE RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1962	8,705
WENATCHEE RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1947	8,705
WENATCHEE R	Washington	Scour Critical — Countermeasures Installed	Fair	1962	8,705
SWAMP CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1960	8,654
SOOS CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1927	8,000
GRIFFIN CR	Washington	Scour Critical — Countermeasures Installed	Fair	1945	7,813
TOUCHET RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1919	7,642
BLACK RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1932	7,629
OHOP CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1900	7,615
PESHASTIN CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1962	7,446
PESHASTIN CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1940	7,446
MISSION CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1963	7,374
PUGET SOUND @ PT VASHON	Washington	Scour Critical — Countermeasures Installed	Fair	1957	7,310
BIG SOOS CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1931	7,293
CHEHALIS RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1971	7,228
LACAMAS CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1933	7,195
SQUILCHUCK CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1954	7,038
PROCTOR CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1933	6,993
SWALE CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1960	6,760
ANDERSON CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1933	6,701
SILVER CREEK	Washington	Scour Critical — Countermeasures Installed	Good	2003	6,690
S PRAIRIE CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1969	6,643
KLICKITAT CREEK	Washington	Scour Critical — Countermeasures Installed	Good	1937	6,548
HUMPTULIPS RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1956	6,510
S FORK SNOQUALMIE RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1941	6,500
STREAM	Washington	Scour Critical — Countermeasures Installed	Fair	1937	6,441
S FK SKYKOMISH RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1933	6,408
WANITY SLOUGH	Washington	Scour Critical — Countermeasures Installed	Poor	1964	6,219
WANITY SLOUGH	Washington	Scour Critical — Countermeasures Installed	Good	1948	6,219
COLUMBIA RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1962	6,212
JOHNS RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1952	6,124
YAKIMA RIVER	Washington	Scour Critical — Countermeasures Installed	Fair	1971	6,083
PUGET SOUND @ EDMONDS	Washington	Scour Critical — Countermeasures Installed	Fair	1995	5,870
CEDAR CREEK	Washington	Scour Critical — Countermeasures Installed	Fair	1932	5,851
WENATCHEE RIVER	Washington	Scour Critical — Countermeasures Installed	Poor	1957	5,800
PACIFIC P L TAILRACE	Washington	Scour Critical — Countermeasures Installed	Good	1934	5,794
ANTHRACITE CREEK	Washington	Scour Critical — Countermeasures Installed	Poor	1940	5,782
BONAPARTE CR	Washington	Scour Critical — Countermeasures Installed	Good	1957	5,771
TEANAWAY R	Washington	Scour Critical — Countermeasures Installed	Fair	1977	5,741

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