Lake No 4 Dam Reservoir Report
Nearby: Crystal Springs Dam Horseshoe Dam
Last Updated: December 15, 2025
Lake No 4 Dam, also known as Peterson Lake, is a private dam located in Nye, Nevada, along the Armagosa River-TR.
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Summary
Built in 1964, this earth dam stands at a height of 14 feet and has a hydraulic height of 13 feet. With a primary purpose of serving as a Fish and Wildlife Pond, the dam also fulfills roles in irrigation and recreation, encompassing a surface area of 79.1 acres and a drainage area of 5.5 square miles.
Despite its low hazard potential, the dam's condition assessment in 2018 revealed a poor state, signaling the need for maintenance and upkeep. With a normal storage capacity of 400 acre-feet and a maximum storage of 650 acre-feet, Lake No 4 Dam plays a crucial role in supporting the local ecosystem and recreational activities. While its spillway type is categorized as uncontrolled, the dam's outlet gates are managed through other controlled means, ensuring proper water flow management.
As a significant landmark in the region, Lake No 4 Dam serves as a vital resource for both wildlife conservation and community enjoyment. With its strategic location and diverse functions, the dam underscores the importance of sustainable water resource management and climate resilience in safeguarding our environment for future generations.
Year Completed |
1964 |
Dam Length |
5500 |
Dam Height |
14 |
River Or Stream |
ARMAGOSA RIVER-TR |
Primary Dam Type |
Earth |
Surface Area |
79.1 |
Hydraulic Height |
13 |
Drainage Area |
5.5 |
Nid Storage |
650 |
Structural Height |
20 |
Outlet Gates |
Other Controlled - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Lake No 4 Dam