Ketchikan Lakes Reservoir Report
Nearby: Fawn Lake Dam North Granite Diversion
Last Updated: December 19, 2025
Ketchikan Lakes, located in Ketchikan, Alaska, is a captivating destination for water resource and climate enthusiasts.
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Summary
This hydroelectric facility, owned by a public utility, serves as a crucial source of water supply and power generation in the region. The dam, completed in 1957, stands at a height of 34 feet and has a storage capacity of 13,353 acre-feet, providing essential resources for the community.
With a high hazard potential and a moderate risk assessment, Ketchikan Lakes plays a vital role in managing water resources and mitigating potential emergencies. The facility, operated by the Federal Energy Regulatory Commission, boasts a rockfill dam type with a structural height of 34 feet and a maximum discharge of 7,500 cubic feet per second. The surrounding area, including Ketchikan Creek, benefits from the reservoir's 632-acre surface area and 8.1 square miles of drainage area.
Despite its critical infrastructure and high hazard potential, Ketchikan Lakes' condition assessment is not currently available. However, regular inspections and emergency action plans are in place to ensure the safety and reliability of the dam. As one of Alaska's key hydroelectric facilities, Ketchikan Lakes stands as a testament to sustainable water resource management and climate resilience in the region.
Year Completed |
1957 |
Dam Length |
1163 |
Dam Height |
34 |
River Or Stream |
Ketchikan Creek |
Primary Dam Type |
Rockfill |
Surface Area |
632 |
Hydraulic Height |
27 |
Drainage Area |
8.1 |
Nid Storage |
13353 |
Structural Height |
34 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
34 |
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.
Ketchikan Lakes