Tailings Dams in Wyoming
Wyoming has 19 tailings dams, of which 1 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 | Lower Snake Draw (4th Enl.) | Sweetwater | 85 | Significant | Fair | 1998 |
| 2 | Mcintosh No. 1 | Fremont | 80 | Low | Fair | 1979 |
| 3 | No. 5a | Sweetwater | 70 | Low | Fair | 1975 |
| 4 | Fgd Effluent #4 | Lincoln | 63 | Significant | Fair | 2010 |
| 5 | Fgd Effluent Pond #5 | Lincoln | 58 | Significant | Satisfactory | 2018 |
| 6 | Ross Recovery Cell 7 | Converse | 56 | Low | Fair | 2016 |
| 7 | Solid Waste Disposal Cell J | Sweetwater | 50 | Low | Fair | 2011 |
| 8 | Pond 1 | Sweetwater | 47 | Low | Fair | 1981 |
| 9 | Solid Waste Disposal Cell D | Sweetwater | 46 | Low | Fair | 1977 |
| 10 | Upper Delta (north Offset Dam & West Offset Dam) | Sweetwater | 40 | High | Fair | 2013 |
| 11 | Pond 4 (dam 2b) | Sweetwater | 39 | Significant | 1992 | |
| 12 | Pond 4 (dam 2a) | Sweetwater | 39 | Significant | Fair | 1992 |
| 13 | Tailings Pond No. 1 | Sweetwater | 38 | Low | Not Available | |
| 14 | Ross Recovery Cell 6 | Converse | 33 | Low | Fair | 2014 |
| 15 | Fmc Granger Tailings Pond Phases 1e -1j | Sweetwater | 28 | Low | Fair | 2013 |
| 16 | Mbpp Ash Pond | Platte | 25 | Low | Satisfactory | 1984 |
| 17 | No. 3 Tailings | Sweetwater | 23 | Low | Fair | 1980 |
| 18 | Solid Waste Disposal Cell C | Sweetwater | 18 | Low | Fair | 2011 |
| 19 | Cell J | Sweetwater | 10 | Low | Not Available |