Yerington Mill Dam is an earth dam located in Lyon County, Nevada. It carries a Significant hazard potential classification.
Dam profile
NID height · 90 ft90 ft tall and 100 ft long, taller than 97% 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 Yerington Mill Dam
The primary purpose of Yerington Mill Dam 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 Arimetco Inc. (private). It impounds the Walker River-os near Schurz.
The dam stands 90 feet tall and stretches 100 feet across, creates a reservoir covering 100 acres, has a maximum storage capacity of 1,166 acre-feet, and collects water from a drainage area of 0 square miles.
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. The most recent inspection on record was 11/15/2021.
At 90 feet, this dam is taller than 97% of all dams in the United States.
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Location
| State | Nevada |
| County | Lyon |
| Nearest City | Schurz |
| River/Stream | Walker River-os |
| Coordinates | 39.01920, -119.19670 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 90 ft |
| Dam Height | 90 ft |
| Dam Length | 100 ft |
Storage & Hydraulics
| NID Storage | 1,166 acre-ft |
| Max Storage | 1,166 acre-ft |
| Normal Storage | 1,100 acre-ft |
| Surface Area | 100 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Tailings |
| Owner | Arimetco Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/15/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NV00144 |
| Federal ID | NV00144 |
| More Info | State Dam Safety Program |