Tailings Dams in Washington

Washington has 26 tailings dams, of which 4 carry a high hazard classification. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted.

#	Dam	County	Height (ft)	Hazard	Condition	Year
1	Centralia Coal Mine Dam No 3d	Lewis	285	Low		1988
2	Kinross Gold Kettle River Tailings Dam	Ferry	189	High	Satisfactory	1994
3	Centralia Coal Mine Dam No 3b	Lewis	140	Significant	Fair	1980
4	Centralia Coal Mine Dam No 3c North	Lewis	134	Significant	Satisfactory	1987
5	Hecla-day Mine Aspen Tailings Dam	Ferry	95	Significant	Fair	1940
6	Van Stone Tailings Dam	Stevens	90	Significant	Poor	1970
7	Pend Oreille Mine Ne Tailings Dam	Pend Oreille	72	Significant	Satisfactory	2003
8	Centralia Coal Mine Dam No 3c South	Lewis	69	Significant	Satisfactory	1987
9	Pend Oreille Mine Nw Tailings Dam	Pend Oreille	67	Significant	Satisfactory	2003
10	Western Nuclear Tailings Pond	Stevens	62	Significant	Satisfactory	1977
11	Hecla-day Mine Aspen Tailings Saddle Dam	Ferry	40	Significant	Fair	1987
12	Van Stone Pit Lake Dam	Stevens	25	High	Poor	1999
13	Kinross Old Reclaim Pond	Ferry	24	Significant	Satisfactory	2008
14	Centralia Coal Mine Dam No 3c East	Lewis	21	Significant	Satisfactory	1987
15	Centralia Coal Mine Dam No 5c	Lewis	20	Low		1970
16	Centralia Coal Mine Dam No 44	Lewis	19	Low		1975
17	Centralia Coal Mine Dam No 3a	Lewis	18	Low		1970
18	Centralia Coal Mine Dam No 8a	Lewis	18	High	Satisfactory	1972
19	Centralia Coal Mine Dam No 36a	Lewis	14	Low		1989
20	Centralia Coal Mine Dam No 5	Lewis	14	Low		1971
21	Centralia Coal Mine Dam No 36	Lewis	13	Low		1989
22	Centralia Coal Mine Dam No 19a	Lewis	13	Low		1977
23	Centralia Coal Mine Dam No 19	Lewis	13	Low		1977
24	Centralia Coal Mine Dam No 6b	Lewis	13	Low		1970
25	Centralia Coal Mine Dam No 8	Lewis	12	High	Satisfactory	1972
26	Centralia Coal Mine Dam No 20c	Thurston	10	Low		1981

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