Middle Magurrewock Dam Reservoir Report
Last Updated: December 22, 2025
Middle Magurrewock Dam, located in Washington County, Maine, is a federal-owned structure managed by the US Fish and Wildlife Service Office of Engineering.
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Summary
This earth dam was completed in 1944 and stands at a height of 15 feet, with a length of 1500 feet, creating a fish and wildlife pond on East Branch Creek. The dam has a low hazard potential and is currently assessed to be in fair condition.
With a normal storage capacity of 1687 acre-feet and a maximum storage of 2368 acre-feet, Middle Magurrewock Dam plays a crucial role in managing water resources in the area. The dam also serves as a controlled spillway with a width of 25 feet, capable of discharging up to 2862 cubic feet of water per second. Despite its age, the dam continues to be regulated, inspected, and maintained by the Fish and Wildlife Service to ensure its structural integrity and safety.
Middle Magurrewock Dam's strategic location and purpose make it a vital component in the conservation and management of water resources for fish and wildlife habitats in the region. As climate change continues to impact the availability and quality of water, the dam's role in maintaining healthy ecosystems and providing flood control becomes increasingly significant. The dedication of the Fish and Wildlife Service to the operation and management of this structure underscores its commitment to environmental stewardship and sustainable water resource management.
Year Completed |
1944 |
Dam Length |
1500 |
Dam Height |
15 |
River Or Stream |
East Branch Creek |
Primary Dam Type |
Earth |
Surface Area |
275 |
Hydraulic Height |
15 |
Drainage Area |
4.9 |
Nid Storage |
2368 |
Structural Height |
15 |
Outlet Gates |
Other Controlled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
15 |
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 |
St. Croix River At Vanceboro
|
369cfs |
Libby Brook Near Northfield
|
9cfs |
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.
Middle Magurrewock Dam