Upper Reservoir Reservoir Report
Nearby: Lower Reservoir Cmp
Last Updated: December 19, 2025
Upper Reservoir, located in Waldo, Maine, is a picturesque water resource managed by a public utility for recreational purposes.
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Summary
Built in 1910, this concrete dam stands at a height of 34 feet, with a storage capacity of 850 acre-feet and a surface area of 49 acres. The reservoir's primary purpose is recreation, offering a serene setting for outdoor enthusiasts to enjoy activities such as boating, fishing, and hiking along the scenic Little River.
Maintained by the Maine Emergency Management Agency (MEMA), Upper Reservoir is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and compliance with regulations. The dam's condition is assessed as fair, with a significant hazard potential, prompting regular inspections every six years. In the event of an emergency, an Emergency Action Plan (EAP) is in place, with the last revision made in August 2020, although specific details regarding preparedness and guidelines adherence are not provided in the data.
With its historical significance and natural beauty, Upper Reservoir offers a tranquil escape for water resource and climate enthusiasts seeking a recreational oasis in the heart of Maine. Boasting a rich ecosystem and ample opportunities for outdoor adventure, this reservoir serves as a vital water source while also providing a safe and regulated environment for visitors to enjoy the wonders of nature.
Year Completed |
1910 |
Dam Length |
169 |
Dam Height |
34 |
River Or Stream |
Little River |
Primary Dam Type |
Concrete |
Surface Area |
49 |
Hydraulic Height |
34 |
Drainage Area |
13.2 |
Nid Storage |
850 |
Structural Height |
34 |
Hazard Potential |
Significant |
Nid Height |
34 |
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.
Upper Reservoir