Fawn Lake Dam South Reservoir Report
Nearby: Fawn Lake Dam North Granite Diversion
Last Updated: December 20, 2025
Fawn Lake Dam South is a rockfill dam located in Ketchikan Gateway, Alaska, with a primary purpose of hydroelectric power generation.
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Summary
Completed in 1957, the dam stands at 22 feet high and spans 385 feet in length, creating a reservoir with a normal storage capacity of 80 acre-feet. The dam serves both hydroelectric and water supply purposes, contributing to the sustainability of the surrounding area.
Managed by a local government entity, Fawn Lake Dam South falls under the regulatory purview of the Federal Energy Regulatory Commission (FERC) for inspections and oversight. Despite being classified as having a low hazard potential, the risk assessment indicates a high level, emphasizing the importance of effective risk management measures. The dam has not been modified in recent years, and its condition assessment is currently not available, highlighting the need for ongoing monitoring and maintenance to ensure its structural integrity and operational safety.
With a unique design featuring a rock core and buttress foundation, Fawn Lake Dam South represents a critical infrastructure asset within the region. As a contributor to the local water resource and climate landscape, the dam's role in hydroelectric power generation underscores its significance in supporting sustainable energy practices and resource management efforts. Continued collaboration between local authorities and regulatory agencies will be essential in maintaining the dam's functionality and mitigating potential risks associated with its operation.
Year Completed |
1957 |
Dam Length |
385 |
Dam Height |
22 |
River Or Stream |
None |
Primary Dam Type |
Rockfill |
Surface Area |
4 |
Drainage Area |
0.1 |
Nid Storage |
80 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
22 |
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.
Fawn Lake Dam South