Tailings Dams in Idaho

Idaho has 17 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	Thompson Mtis	Custer	789	High	Fair	1982
2	Lucky Friday No 4	Shoshone	132	High	Satisfactory	2010
3	Grouse Creek North	Custer	110	Significant	Satisfactory	1994
4	Smoky Canyon No 2	Caribou	108	Significant	Satisfactory	1992
5	Lucky Friday No 3	Shoshone	102	Significant	Fair	1979
6	Smoky Canyon No 1	Caribou	80	Low	Fair	1983
7	Itafos Tailings Pond #4	Caribou	71	Significant	Satisfactory	1985
8	Osburn	Shoshone	71	High	Fair
9	Galena Mill No 3 Lower	Shoshone	64	Significant	Fair	1979
10	Sunshine No 2	Shoshone	54	Significant	Fair
11	Beartrack H2o Overflow Pond	Lemhi	52	Low	Satisfactory	1995
12	Galena No 2 Mtis	Shoshone	48	Significant	Fair
13	Conda Site Mtis (simplot)	Caribou	45	Significant	Satisfactory	1979
14	Delamar Wmp-1	Owyhee	42	Low	Satisfactory	2009
15	Star No 6	Shoshone	33	High	Fair	1979
16	Simplot Decant Pond	Power	21	Low	Satisfactory	2009
17	Beartrack Treatment Lagoon	Lemhi	20	Low	Satisfactory	1995

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