Tailings Dams in Colorado

Colorado has 9 tailings dams, of which 3 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.

#DamCountyHeight (ft)HazardConditionYear
1Ten Mile Pond #3 DamSummit416HighNot Available
2Mayflower Pond # 5Summit237HighNot Available
3#1 Tailings PondEagle235SignificantNot Available
4RobinsonEagle110HighSatisfactory1936
5Cotter TailingsFremont104LowNot Rated1980
6CoyoteMoffat66LowNot Rated1977
7Robinson Tailings Pond #2 DamPark52SignificantNot Available
8St. Joe TailingsBoulder42LowNot Rated1936
9Unocal Storage Pond #3Garfield21LowSatisfactory1989

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