Otis Reservoir Report
Nearby: Livermore Falls Jay
Last Updated: December 18, 2025
Otis is a captivating hydroelectric dam located on the Androscoggin River in Livermore Falls, Maine.
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Summary
Built in 1898, this concrete gravity dam stands at 19 feet tall and stretches 1178 feet in length, with a storage capacity of 1700 acre-feet and a maximum discharge of 116,000 cubic feet per second. Operated by a private owner, Otis serves as a key source of renewable energy in the region, harnessing the power of the river to generate electricity.
Managed by the Federal Energy Regulatory Commission, Otis has a low hazard potential and a moderate risk assessment rating. While its condition assessment is not available, regular inspections are conducted every 3 years to ensure its structural integrity and safety. Despite its age, Otis continues to play a vital role in water resource management and climate action, highlighting the importance of sustainable hydroelectric power in the transition towards a greener future.
With its historical significance and environmental impact, Otis serves as a prime example of how hydroelectric infrastructure can contribute to both energy production and water conservation efforts. As a part of the New England District, Otis stands as a testament to the resilience and longevity of renewable energy sources, showcasing the potential for sustainable development in the face of climate change challenges.
Year Completed |
1898 |
Dam Length |
1178 |
Dam Height |
19 |
River Or Stream |
Androscoggin River |
Primary Dam Type |
Concrete |
Surface Area |
115 |
Drainage Area |
2490 |
Nid Storage |
1700 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nezinscot River At Turner Center
|
43cfs |
Androscoggin River At Rumford
|
2130cfs |
Sandy River Near Mercer
|
326cfs |
Little Androscoggin River Near South Paris
|
57cfs |
Swift River Near Roxbury
|
89cfs |
Kennebec River At North Sidney
|
2090cfs |
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.
Otis
Federal Road 694, Livermore