Mattanawcook Pond Reservoir Report
Nearby: Mill Pond Lpp Folsom Pond
Last Updated: December 21, 2025
Mattanawcook Pond in Maine plays a crucial role in flood risk reduction, with its concrete dam standing at a height of 13 feet and completed in 1918.
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Summary
The pond has a storage capacity of 2363 acre-feet and a normal storage level of 1772 acre-feet, covering a surface area of 832 acres and draining a 28-square mile area. The dam is regulated by the Maine Emergency Management Agency (MEMA) and undergoes regular inspections to ensure its structural integrity.
Located along Mattanawcook Stream in Penobscot County, Mattanawcook Pond not only serves as a flood risk reduction structure but also provides other environmental benefits. With a low hazard potential and a condition assessment of "Not Rated," the pond is a valuable asset in the region's water resource management. It is a private-owned facility and has a spillway width of 26 feet, offering a controlled release of water during high flow events. The dam's emergency action plan status and risk assessment information are currently not available, but its importance in mitigating flood risks is evident.
In the care of the New England District of the US Army Corps of Engineers, Mattanawcook Pond stands as a historic and functional infrastructure for water resource management in Maine. With a primary purpose of flood risk reduction, the pond's role in protecting downstream areas and maintaining water levels showcases its significance in climate resilience efforts. As climate change impacts continue to challenge water resources, the management and maintenance of structures like Mattanawcook Pond are essential for ensuring the safety and sustainability of communities in the region.
Year Completed |
1918 |
Dam Length |
223 |
Dam Height |
13 |
River Or Stream |
Mattanawcook Stream |
Primary Dam Type |
Concrete |
Surface Area |
832 |
Hydraulic Height |
10 |
Drainage Area |
28 |
Nid Storage |
2363 |
Structural Height |
13 |
Hazard Potential |
Low |
Nid Height |
13 |
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.
Mattanawcook Pond
Lake Street Lincoln