Alamoosook Lake Reservoir Report
Nearby: Orland Village Craig Pond Dam
Last Updated: December 20, 2025
Alamoosook Lake in Orland, Maine, is a private water resource with a primary purpose of recreation.
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Summary
This picturesque lake, fed by the Narramissic River, boasts a concrete dam with a height of 15 feet and a length of 165 feet, completed in 1930. With a maximum storage capacity of 2750 acre-feet and a normal storage of 2200 acre-feet, Alamoosook Lake covers an expansive surface area of 1133 acres, providing ample space for water-based activities.
Despite its fair condition assessment and high hazard potential, Alamoosook Lake remains a popular destination for water enthusiasts, offering opportunities for boating, fishing, and relaxation in a serene natural setting. The dam's inspection frequency of 6 months ensures ongoing monitoring of its structural integrity and safety. With state regulation, permitting, inspection, and enforcement in place, Alamoosook Lake is managed responsibly to maintain its recreational and water supply functions while safeguarding against potential risks and emergencies. As climate and water resource enthusiasts, this data on Alamoosook Lake provides a fascinating glimpse into the intersection of human infrastructure and natural ecosystems in a vital water source in Maine.
Year Completed |
1930 |
Dam Length |
165 |
Dam Height |
15 |
River Or Stream |
Narramissic River |
Primary Dam Type |
Concrete |
Surface Area |
1133 |
Hydraulic Height |
15 |
Nid Storage |
2750 |
Structural Height |
15 |
Hazard Potential |
High |
Nid Height |
15 |
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.
Alamoosook Lake