Adak Log Dam Reservoir Report
Last Updated: December 31, 2025
The Adak Log Dam in Alaska is a crucial water supply structure owned by the local government and regulated by the Alaska Department of Natural Resources.
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Summary
Completed in 1970, this buttress dam stands at a height of 9 meters and has a length of 60 meters, providing a storage capacity of 118 acre-feet. Its primary purpose is to supply water to the community of ADAK NAVAL BASE, ensuring a reliable water source for its residents.
Despite its low hazard potential, the Adak Log Dam is assessed to be in poor condition, with the last inspection conducted in 1980 revealing the need for maintenance and improvements. The risk assessment for this dam is classified as very high, indicating the urgent need for risk management measures to be implemented. With a controlled spillway and a maximum discharge of 300 cubic feet per second, the dam plays a crucial role in managing water resources in the region.
As water resource and climate enthusiasts, it is essential to monitor the condition of structures like the Adak Log Dam and advocate for necessary repairs and upgrades to ensure the safety and sustainability of our water supply systems. By staying informed and engaged in the management of our water resources, we can contribute to the protection of our environment and the resilience of our communities in the face of changing climate conditions.
Year Completed |
1970 |
Dam Length |
60 |
Primary Dam Type |
Other |
Hydraulic Height |
9 |
Nid Storage |
118 |
Structural Height |
9 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
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.
Adak Log Dam