High Risk Dams in Washington

Washington has 52 high hazard dams with a condition assessment of poor or unsatisfactory. These are dams where failure would probably cause loss of human life and where recognized safety deficiencies have been identified.

Of the 405 high hazard dams in Washington, 52 (12%) have concerning condition ratings — 47 rated poor and 5 rated unsatisfactory.

Dam	County	Height (ft)	Condition	Purpose	Year
Mossyrock	Lewis	606	Unsatisfactory	Hydroelectric	1968
Lower Baker	Skagit	285	Poor	Hydroelectric	1927
Mayfield	Lewis	250	Unsatisfactory	Hydroelectric	1963
Wells	Chelan	160	Poor	Hydroelectric	1968
Indian Creek Dam	Pacific	73	Poor	Water Supply	1989
Ponderosa Lake Dam	Stevens	60	Poor	Recreation	1969
Newcastle Railroad Embankment Dam	King	55	Poor	Flood Risk Reduction	1900
Lords Lake East Dam	Jefferson	42	Poor	Water Supply	1956
Yale Saddle Dam	Cowlitz	40	Unsatisfactory	Hydroelectric	1953
Spokane Hutterian Brethren Dam	Spokane	39	Poor	Flood Risk Reduction	2006
Moxee Valley Orchards Dam	Yakima	39	Poor	Irrigation	1985
Upriver Dam	Spokane	38	Poor	Hydroelectric	1937
Parker Reservoir Dam	Yakima	36	Poor	Irrigation	1955
Fairview Reservoir No 1	Grays Harbor	35	Poor	Water Supply	1915
Yelm Canal Dike	Thurston	35	Unsatisfactory	Hydroelectric	1930
Klonaqua Lake Dam	Chelan	35	Poor	Irrigation	1933
Evans Konnowac Dam	Yakima	33	Poor	Irrigation	1990
College Hill Reservoir	Grays Harbor	31	Poor	Water Supply	1899
Beacon Hill Reservoir	Grays Harbor	30	Poor	Water Supply	1935
Koura Dam	Kitsap	28	Poor	Irrigation	1949
Calispell Creek Dike And Pump Plant	Pend Oreille	28	Poor	Hydroelectric
Blair Reservoir Dam	Benton	28	Poor	Irrigation	1937
Elwick Dam	Clallam	25	Poor	Irrigation	1962
Van Stone Pit Lake Dam	Stevens	25	Poor	Tailings	1999
Twin Lakes	Ferry	25	Poor	Irrigation	1931
Swano Lake Dam	Grays Harbor	24	Poor	Fish and Wildlife Pond	1949
Kayak Lake Dam	Snohomish	24	Poor	Recreation	1965
Eightmile Lake Outlet Dam	Chelan	22	Poor	Irrigation	1933
Belfair Wwtp Treated Water Storage Pond	Mason	22	Poor	Other	2014
Olympic Orchards Dam 1	Yakima	21	Poor	Irrigation	1985
Cascade Lake Dam	San Juan	21	Poor	Hydroelectric	1915
Kyte Dam	Thurston	20	Poor	Irrigation	1966
Carlisle Lake Dam	Lewis	19	Poor	Fish and Wildlife Pond	1920
Schweitzer Dam And Reservoir	Okanogan	18	Poor	Irrigation	1914
Colchuck Lake Dam	Chelan	18	Poor	Irrigation	1930
Evans Far West Pond Dam	Yakima	18	Poor	Irrigation	1997
Beitey Lake Dam	Stevens	17	Poor	Recreation	1934
Meadow Lake Dam	Chelan	17	Poor	Irrigation	1920
Stevenson Dam	Yakima	17	Poor	Recreation	1969
Serenity Lake Dam	Stevens	17	Poor	Recreation	1972
Whistle Lake Dam	Skagit	15	Poor	Fish and Wildlife Pond	1925
Rabel Dam	Okanogan	15	Poor	Recreation	1940
Eaglemont Storm Pond	Snohomish	14	Poor	Flood Risk Reduction	2014
Rainbow Springs Dam	Snohomish	14	Poor	Recreation	1969
Newman Lake Flood Control Dam	Spokane	13	Poor	Flood Risk Reduction	1976
Den Hoed Dam No 1	Yakima	12	Poor	Irrigation	1999
Haight Reservoir Dam	Clark	12	Poor	Irrigation	1951
Owhi	Okanogan	12	Unsatisfactory	Irrigation	1915
Mountain Meadows Lake Dam	Pend Oreille	10	Poor	Recreation	1959
Nielsen Dam C	Snohomish	9	Poor	Recreation	1973
Nielsen Dam B	Snohomish	9	Poor	Recreation	1973
Square Lake Dam	Chelan	7	Poor	Irrigation	1938

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