Seeley Flowage Dam Reservoir Report
Nearby: Maccrae Flowage Otter Flowage Dike
Last Updated: December 22, 2025
The Seeley Flowage Dam, also known as Mile Bridge Dike, is a federal-owned structure located in Washington County, Maine.
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Summary
Managed by the US Fish and Wildlife Service Office of Engineering, this earth-type dam was completed in 1958 and primarily serves as a Fish and Wildlife Pond. With a height of 8 feet and a length of 650 feet, the dam has a normal storage capacity of 202 acre-feet and a maximum storage of 329 acre-feet.
This dam, regulating a tributary to Moosehorn Brook, is under state regulation by the Maine Emergency Management Agency (MEMA). Despite being classified as having a low hazard potential, the dam's condition is assessed as poor, posing a very high risk (1) according to the risk assessment. The last inspection in 2014 indicated a need for improvement, with an inspection frequency of every 5 years. The structure also has a controlled spillway type with a width of 7 feet and other controlled outlet gates.
Enthusiasts interested in water resources and climate change in the Maine area may find the Seeley Flowage Dam intriguing due to its unique purpose as a Fish and Wildlife Pond, its historical significance dating back to 1958, and its current condition and risk assessment. As a federally-owned structure managed by the Fish and Wildlife Service, the dam presents an opportunity for further study and potential improvement to ensure its safety and functionality in the face of changing environmental conditions.
Year Completed |
1958 |
Dam Length |
650 |
Dam Height |
8 |
River Or Stream |
Tributary to Moosehorn Brook |
Primary Dam Type |
Earth |
Surface Area |
73 |
Hydraulic Height |
8 |
Drainage Area |
0.8 |
Nid Storage |
329 |
Structural Height |
8 |
Outlet Gates |
Other Controlled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
8 |
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.
Seeley Flowage Dam