Lockwood Reservoir Report
Last Updated: December 19, 2025
Lockwood, also known as Milstar Dam, is a private hydroelectric concrete structure located on the Kennebec River in Waterville, Maine.
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Summary
Completed in 1919, this dam stands at 17 feet high and spans 875 feet in length, with a storage capacity of 600 acre-feet and a surface area of 81.5 acres. With a low hazard potential and a moderate risk assessment rating, Lockwood is regulated by the Federal Energy Regulatory Commission and undergoes inspections every three years to ensure its safety and compliance.
Despite being privately owned, Lockwood plays a crucial role in generating hydroelectric power and managing water resources in the region. It has a maximum discharge capacity of 123,000 cubic feet per second and features an uncontrolled spillway that is 710 feet wide. The dam serves as an important infrastructure for the community and contributes to the overall water management efforts in the area. Its location on the Kennebec River provides valuable insights into how dams can be utilized for renewable energy production and water resource management in a sustainable manner.
With its historical significance dating back over a century, Lockwood continues to be a key player in the region's water resource and climate initiatives. As part of the Federal Energy Regulatory Commission's oversight, the dam adheres to strict regulations and undergoes regular inspections to ensure its structural integrity and safety. As climate change continues to impact water resources, dams like Lockwood play a crucial role in mitigating risks, managing water levels, and supporting renewable energy generation for a more sustainable future.
Year Completed |
1919 |
Dam Length |
875 |
Dam Height |
17 |
River Or Stream |
Kennebec River |
Primary Dam Type |
Concrete |
Surface Area |
81.5 |
Drainage Area |
4228 |
Nid Storage |
600 |
Hazard Potential |
Low |
Nid Height |
17 |
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.
Lockwood
Belgrade Avenue 18, Oakland