Lake Leone Dam Reservoir Report
Nearby: Lake Demarie Dam Bonnie Rose Lake Dam
Last Updated: December 31, 2025
Lake Leone Dam, located in the Aleutians West region of Alaska, is a privately owned structure primarily used for water supply purposes.
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Summary
Constructed in 1945, this buttress dam stands at a height of 9 feet with a hydraulic height of 8 feet. It has a storage capacity of 1690 acre-feet, with a normal storage level of 1545 acre-feet, making it a crucial source of water in the area.
Managed by the Alaska Department of Natural Resources, the dam is subject to state regulation, inspection, and enforcement. With a significant hazard potential and a moderate risk assessment rating, the dam poses challenges that require proper risk management measures. Its spillway type is uncontrolled, with a width of 6 feet, and it has a maximum discharge capacity of 400 cubic feet per second.
For water resource and climate enthusiasts, Lake Leone Dam is a notable structure in Alaska's landscape, serving a vital role in water supply. Its historical significance, design features, and risk assessment provide a fascinating insight into the intersection of infrastructure and environmental management in remote regions like the Aleutians West. The dam's presence underscores the importance of sustainable water resource management and the need for proactive risk mitigation strategies in the face of changing climate conditions.
Hydraulic Height |
8 |
Year Completed |
1945 |
Structural Height |
9 |
Nid Storage |
1690 |
Foundations |
Unlisted/Unknown |
Dam Length |
24 |
Hazard Potential |
Significant |
Primary Dam Type |
Buttress |
Nid Height |
9 |
Seasonal Comparison
Weather Forecast
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 Leone Dam