Tailings Dams in California
California has 6 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.
| # | Dam | County | Height (ft) | Hazard | Condition | Year |
|---|---|---|---|---|---|---|
| 1 | Rancho Seco | Sacramento | 58 | High | Satisfactory | 1972 |
| 2 | Shinn | Alameda | 45 | Significant | Satisfactory | 1987 |
| 3 | Quarry Pits | Alameda | 26 | High | Satisfactory | 1997 |
| 4 | Silt Pond | Riverside | 25 | High | Not Available | |
| 5 | Pond K | Amador | 22 | Low | Satisfactory | 2006 |
| 6 | Redwood Landfill Leachate Impoundment | Marin | 10 | Significant | Fair | 1991 |