Seboeis Lake Reservoir Report
Nearby: Schoodic Lake Sam Ayers Dam
Last Updated: December 22, 2025
Seboeis Lake in Maine is a state-regulated hydroelectric reservoir with a dam constructed in 1925.
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Summary
The concrete dam stands at a height of 11 feet and spans a length of 384 feet, creating a reservoir with a maximum storage capacity of 20,160 acre-feet. The lake covers an area of 4201 acres and serves as a vital water resource in Piscataquis County, providing hydroelectric power and recreational opportunities for the local community.
Despite its age, the dam at Seboeis Lake has a low hazard potential and has not been rated for its condition as of the last inspection in July 2002. The dam's emergency action plan status and risk assessment measures remain unspecified, highlighting the need for further evaluation and preparedness in the event of unforeseen events. The lake's association with the US Army Corps of Engineers is non-existent, raising questions about its management and oversight in the face of changing climate patterns and water resource demands.
Located in Congressional District 02, Maine, Seboeis Lake offers a glimpse into the intersection of water resource management, climate resilience, and hydroelectric power generation. As climate enthusiasts and water resource stakeholders continue to monitor and assess the state of Seboeis Lake, collaboration with state and federal agencies will be crucial in ensuring the long-term sustainability and safety of this important water infrastructure in Maine's landscape.
Year Completed |
1925 |
Dam Length |
384 |
Dam Height |
11 |
River Or Stream |
Seboeis Lake |
Primary Dam Type |
Concrete |
Surface Area |
4201 |
Hydraulic Height |
11 |
Nid Storage |
20160 |
Structural Height |
11 |
Hazard Potential |
Low |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Seboeis Lake