Sebec Reservoir Report
Nearby: Milo Hydro East Davee Brook
Last Updated: December 22, 2025
Sebec is a privately owned hydroelectric dam located on the Sebec River in Milo, Maine.
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Summary
Completed in 1984, this timber crib dam stands at 15 feet tall and spans 273 feet in length, with a storage capacity of 60,330 acre-feet and a maximum discharge of 14,200 cubic feet per second. The dam's primary purpose is hydroelectric power generation, making it a vital asset for sustainable energy production in the region.
Despite its age, Sebec dam is considered to have a high hazard potential due to its structural design and location. While the condition assessment is not available, the dam undergoes regular inspections by the Federal Energy Regulatory Commission to ensure its safety and compliance with regulations. The emergency action plan for the dam was last revised in April 2021, indicating ongoing efforts to mitigate risks and ensure preparedness for any potential incidents or emergencies.
With a moderate risk assessment rating of 3, Sebec dam is a crucial piece of infrastructure in the region, providing both power generation and water resource management. As climate change continues to impact water resources and energy production, the upkeep and safety of dams like Sebec are essential for maintaining a sustainable and resilient infrastructure in the face of evolving environmental challenges.
Year Completed |
1984 |
Dam Length |
273 |
Dam Height |
15 |
River Or Stream |
Sebec River |
Primary Dam Type |
Timber Crib |
Surface Area |
6803 |
Drainage Area |
327 |
Nid Storage |
60330 |
Hazard Potential |
High |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Piscataquis River Near Dover-Foxcroft
|
1160cfs |
Piscataquis River At Medford
|
880cfs |
Kingsbury Stream At Abbot Village
|
60cfs |
Penobscot River At West Enfield
|
17000cfs |
Piscataquis River At Blanchard
|
67cfs |
Kenduskeag Stream Near Bangor
|
51cfs |
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.
Sebec