1 West is an earth dam located in Graham County, Arizona. It carries a Low hazard potential classification.
Dam profile
NID height · 400 ft400 ft tall and 1 ft long, taller than 99% of U.S. dams with a recorded height. Height is drawn to scale against the Statue of Liberty, 305 ft ground to torch; the profile is a generic embankment section and the water level is illustrative.
About 1 West
The primary purpose of 1 West 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 Freeport Mcmoran Morenci Inc. (private).
The dam stands 400 feet tall and stretches 1 feet across, and has a maximum storage capacity of 13,137 acre-feet.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
At 400 feet, this dam is taller than 99% of all dams in the United States.
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Location
| State | Arizona |
| County | Graham |
| Nearest City | Morenci |
| Coordinates | 33.03306, -109.70000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 400 ft |
| Dam Height | 400 ft |
| Dam Length | 1 ft |
Storage & Hydraulics
| NID Storage | 13,137 acre-ft |
| Max Storage | 13,137 acre-ft |
Ownership & Safety
| Purpose | Tailings |
| Owner | Freeport Mcmoran Morenci Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | No |
Identifiers
| NID ID | AZ83453 |
| Federal ID | AZ83453 |
| More Info | State Dam Safety Program |