Damariscotta - Waste Gate Dam Reservoir Report
Last Updated: December 18, 2025
The Damariscotta Waste Gate Dam, located in Maine along the Damariscotta River, was completed in 1920 and serves as a vital hydroelectric structure in the area.
°F
°F
mph
Wind
%
Humidity
Summary
This concrete gravity dam stands at a height of 9.5 feet and has a storage capacity of 142,529 acre-feet, providing essential water resources for the region. With a controlled spillway and two slide gates, the dam is classified as having a low hazard potential but a very high risk assessment, reflecting the importance of proper maintenance and monitoring.
Owned privately, the Damariscotta Waste Gate Dam is regulated by the Federal Energy Regulatory Commission, ensuring its compliance with safety and environmental standards. Despite its age, the dam's condition assessment is not available, indicating a need for further evaluation to assess its structural integrity and potential risks. With a history of operation for over a century, the dam plays a crucial role in supporting the local community's energy needs and managing water resources along the Damariscotta River.
As a key infrastructure for hydroelectric power generation, the Damariscotta Waste Gate Dam stands as a testament to sustainable energy practices in the region. Its strategic location and design contribute to the efficient harnessing of water resources for electricity production while also maintaining a balance with environmental conservation efforts. With ongoing inspections and risk assessments, this dam remains a significant asset in the management of water resources and climate impact mitigation in the area.
Year Completed |
1920 |
Dam Length |
57 |
Dam Height |
9.5 |
River Or Stream |
Damariscotta River |
Primary Dam Type |
Concrete |
Surface Area |
4625 |
Drainage Area |
57 |
Nid Storage |
142529 |
Outlet Gates |
Slide (sluice gate) - 2 |
Hazard Potential |
Low |
Nid Height |
10 |
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.
Damariscotta - Waste Gate Dam