Summary
Completed in 1907, this concrete, earth, and gravity dam stands at a height of 25.7 feet with a length of 717 feet, providing storage capacity of 1950 acre-feet. The dam serves multiple purposes including flood risk reduction, recreation, and water supply, making it a vital infrastructure for the region.
Managed by the Federal Energy Regulatory Commission (FERC), East Millinocket dam has a controlled spillway width of 455 feet and a maximum discharge capacity of 75,500 cubic feet per second. Despite its age, the dam has a low hazard potential and a very high risk assessment rating, emphasizing the importance of regular inspections and risk management measures. The dam's emergency action plan was last revised in December 2018, ensuring preparedness for any potential emergencies.
For water resource and climate enthusiasts, East Millinocket's hydroelectric dam presents a fascinating intersection of engineering, environmental conservation, and public safety. Its role in providing renewable energy, managing water resources, and supporting wildlife habitats underscores the interconnectedness of water infrastructure and climate resilience in the region. As a historic structure with modern regulatory oversight, East Millinocket dam serves as a reminder of the ongoing efforts to balance the benefits and risks of harnessing water resources for societal needs.
Year Completed |
1907 |
Dam Length |
717 |
Dam Height |
25.7 |
River Or Stream |
West Branch Penobscot River |
Surface Area |
128 |
Drainage Area |
2111 |
Nid Storage |
1950 |
Outlet Gates |
Slide (sluice gate) - 2 |
Hazard Potential |
Low |
Nid Height |
26 |
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.
East Millinocket
Medway Road Millinocket
Hay Brook To Bridge Above Medway At State Route 157