Allerman #1 Dam
Allerman #1 Dam is an earth dam located in Douglas County, Nevada. It carries a High hazard potential classification and has a fair condition assessment.
About Allerman #1 Dam
The primary purpose of Allerman #1 Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Allerman Upper Virginia Irrigation Co Inc (private). It impounds the Carson River-os near Minden.
The dam stands 21 feet tall and stretches 2,800 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 500 acre-feet, and collects water from a drainage area of 5 square miles.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 11/21/2022.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Nevada dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Nevada |
| County | Douglas |
| Nearest City | Minden |
| River/Stream | Carson River-os |
| Coordinates | 38.95160, -119.70970 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 20 ft |
| Dam Length | 2,800 ft |
Storage & Hydraulics
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Normal Storage | 450 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | ALLERMAN UPPER VIRGINIA IRRIGATION CO INC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 11/21/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NV00092 |
| Federal ID | NV00092 |
| More Info | State Dam Safety Program |