Maccrae Flowage Reservoir Report
Nearby: Otter Flowage Dike Otter Dam
Last Updated: December 22, 2025
Maccrae Flowage, located in Washington County, Maine, is a federal-owned water resource managed by MEMA with the primary purpose of flood risk reduction.
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Summary
This earth-type dam, completed in 1966, stands at a height of 7 feet and has a length of 225 feet, providing a storage capacity of 120 acre-feet. The flowage is situated on the TR Moose Horn River and covers a surface area of 4 acres, offering essential flood protection to the surrounding area.
Despite being classified as having low hazard potential and not yet rated for condition assessment, Maccrae Flowage plays a vital role in managing water resources in the region. With state regulation and inspection in place, the dam ensures the safety and stability of the structure, although further assessments and emergency preparedness measures are yet to be fully implemented. The flowage also serves purposes beyond flood risk reduction, including support for fish and wildlife habitats, highlighting its significance in promoting ecological diversity and sustainability in the area.
As a key component of New England District's water resource management, Maccrae Flowage stands as a symbol of the intersection between human engineering and environmental conservation. Its strategic location, coupled with its operational efficiency, showcases a harmonious balance between flood protection, wildlife preservation, and sustainable water use. For water resource and climate enthusiasts, Maccrae Flowage serves as a fascinating case study of how infrastructure can be designed and managed to benefit both human communities and natural ecosystems in a changing climate landscape.
Year Completed |
1966 |
Dam Length |
225 |
Dam Height |
7 |
River Or Stream |
TR Moose Horn |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
7 |
Nid Storage |
120 |
Structural Height |
7 |
Hazard Potential |
Low |
Nid Height |
7 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
St. Croix River At Baring
|
1100cfs |
Dennys River At Dennysville
|
1010cfs |
Grand Lake Stream At Grand Lake Stream
|
113cfs |
Old Stream Near Wesley
|
27cfs |
Libby Brook Near Northfield
|
9cfs |
St. Croix River At Vanceboro
|
369cfs |
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.
Maccrae Flowage