Lower Great Brook Reservoir Report
Nearby: East Branch Heart Pond
Last Updated: December 19, 2025
Lower Great Brook in Damariscotta, Maine, is a significant earth dam constructed in 1970 for fire protection, stock, and as a small fish pond.
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Summary
With a dam height of 20 feet and a hydraulic height of 16 feet, it serves multiple purposes including fish and wildlife pond. The dam has a fair condition assessment and a hazard potential classified as significant, making it a crucial water resource for the area.
Owned by a public utility and regulated by the Maine Emergency Management Agency, Lower Great Brook plays a vital role in maintaining the water supply for the region. The dam has a storage capacity of 19 acre-feet and a surface area of 2 acres, providing essential water resources for fire protection and wildlife conservation. The dam also serves as a recreational spot for fishing and other outdoor activities.
Located in Lincoln County, Maine, Lower Great Brook is a key feature in the local water infrastructure, ensuring water availability for both human and wildlife needs. With regular inspections and enforcement by state regulatory agencies, the dam continues to play a crucial role in water management and conservation efforts in the region, highlighting the importance of sustainable water resource management in the face of changing climate conditions.
Year Completed |
1970 |
Dam Length |
300 |
Dam Height |
20 |
River Or Stream |
Great Brook |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
16 |
Nid Storage |
19 |
Structural Height |
20 |
Hazard Potential |
Significant |
Nid Height |
20 |
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 Great Brook