Echo Lake Reservoir Report
Nearby: Arnold Brook Mantle Lake
Last Updated: December 19, 2025
Echo Lake in Aroostook, Maine, is a state-regulated dam that serves multiple purposes including flood risk reduction, fire protection, and recreation.
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Summary
Completed in 1963, this earth dam stands at a height of 16.5 feet and has a storage capacity of 257 acre-feet, with a normal storage level of 220 acre-feet. The dam, located on Arnold Brook, covers a surface area of 83 acres and has a drainage area of 1.54 square miles.
Despite being classified as having a low hazard potential, Echo Lake's condition was assessed as fair in 2011. The dam has a spillway width of 30 feet and is inspected every 12 months, with the last inspection conducted in August 2014. The dam is owned by the state of Maine and falls under the regulatory authority of the Maine Emergency Management Agency (MEMA). Water resource and climate enthusiasts will appreciate the diverse range of functions that Echo Lake serves, from flood control to supporting fish and wildlife habitats, making it a vital resource in the region.
Year Completed |
1963 |
Dam Length |
154 |
Dam Height |
16.5 |
River Or Stream |
Arnold Brook |
Primary Dam Type |
Earth |
Surface Area |
83 |
Drainage Area |
1.54 |
Nid Storage |
257 |
Structural Height |
16.5 |
Hazard Potential |
Low |
Nid Height |
17 |
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.
Echo Lake
Niles Road 38, Presque Isle