D Tailings is an earth dam located in Pinal County, Arizona. It carries a Significant hazard potential classification.
Dam profile
NID height · 150 ft150 ft tall and 1 ft long, taller than 99% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About D Tailings
The primary purpose of D Tailings is tailings. Tailings dams contain waste material from mining operations — typically a slurry of finely ground rock left over after valuable minerals have been extracted. These structures require ongoing monitoring because tailings can contain heavy metals and other contaminants. The dam is owned by Asarco (private).
The dam stands 150 feet tall and stretches 1 feet across, and has a maximum storage capacity of 63,000 acre-feet.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam.
At 150 feet, this dam is taller than 99% of all dams in the United States.
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Location
| State | Arizona |
| County | Pinal |
| Nearest City | Kearney, Az |
| Coordinates | 32.98389, -110.81917 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 150 ft |
| Dam Height | 150 ft |
| Dam Length | 1 ft |
Storage & Hydraulics
| NID Storage | 63,000 acre-ft |
| Max Storage | 63,000 acre-ft |
Ownership & Safety
| Purpose | Tailings |
| Owner | Asarco |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | AZ83462 |
| Federal ID | AZ83462 |
| More Info | State Dam Safety Program |