Summary
Completed in 1973, the dam serves a primary purpose of hydroelectric power generation and has a structural height of 30 feet with a hydraulic height of 28 feet. With a storage capacity of 147,000 acre-feet and a surface area of 1,375 acres, the dam plays a crucial role in water resource management in the region.
Managed by a public utility, Long Lake Dam is regulated by the Alaska Department of Natural Resources and undergoes regular inspections to ensure its safety and functionality. The dam has a low hazard potential and is classified as being in fair condition, with a moderate risk assessment rating. Despite its relatively low risk level, the dam is equipped with emergency action plans to address any potential hazards and ensure the safety of surrounding communities in case of emergencies.
Long Lake Dam contributes to the sustainable development of the region by providing clean and renewable energy through hydroelectric power generation. It stands as a testament to effective water resource management and climate-conscious infrastructure development in Alaska, showcasing the importance of balancing environmental considerations with the need for energy production and water supply in the face of a changing climate.
Year Completed |
1973 |
Dam Length |
337 |
River Or Stream |
LONG RIVER |
Primary Dam Type |
Concrete |
Surface Area |
1375 |
Hydraulic Height |
28 |
Drainage Area |
32 |
Nid Storage |
147000 |
Structural Height |
30 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
30 |
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.
Long Lake Dam