Lower Reservoir Reservoir Report
Nearby: Upper Reservoir Cmp
Last Updated: December 19, 2025
Lower Reservoir in Waldo, Maine, is a concrete gravity dam completed in 1943 with a primary purpose of recreation.
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Summary
Situated on the Little River, this reservoir offers a serene setting for outdoor enthusiasts to enjoy various water-based activities. With a maximum storage capacity of 615 acre-feet and a normal storage of 370 acre-feet, the reservoir covers a surface area of 39 acres and has a drainage area of 16.5 square miles.
The dam stands at a height of 36 feet, with a hydraulic height of 30 feet, providing both structural integrity and flood control capabilities. Despite its significant hazard potential, Lower Reservoir is deemed to be in satisfactory condition, last assessed in October 2015. The dam's spillway width of 91 feet ensures efficient water discharge during periods of high flow, while its location in a state-regulated area under MEMA's jurisdiction guarantees regular inspections and enforcement of safety measures.
Managed by a public utility, Lower Reservoir is a vital water resource contributing to the local community's recreational needs. With its historical significance and strategic location, this dam serves as a key infrastructure supporting water supply and climate resilience efforts in the region. Climate enthusiasts and water resource professionals can appreciate the ecological and social benefits provided by Lower Reservoir, making it a valuable asset in Maine's water management infrastructure.
Year Completed |
1943 |
Dam Length |
126 |
Dam Height |
36 |
River Or Stream |
Little River |
Primary Dam Type |
Concrete |
Surface Area |
39 |
Hydraulic Height |
30 |
Drainage Area |
16.5 |
Nid Storage |
615 |
Structural Height |
36 |
Hazard Potential |
Significant |
Nid Height |
36 |
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.
Lower Reservoir