Wesserunsett Reservoir Report
Nearby: Hewett Marsh Weston - North Channel
Last Updated: December 19, 2025
Wesserunsett, located in Somerset County, Maine, is a concrete dam primarily used for flood risk reduction along Mill Stream.
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Summary
Completed in 1800, this dam stands at a height of 11 feet and has a storage capacity of 12,550 acre-feet. With a surface area of 1,446 acres and a drainage area of 18.1 square miles, Wesserunsett plays a crucial role in managing water resources in the region.
The dam is under state jurisdiction and regulated by MEMA, with inspections conducted regularly to ensure its satisfactory condition. Despite its high hazard potential, Wesserunsett has been assessed to meet safety standards. The dam serves multiple purposes including fire protection, recreational activities, and maintaining fish and wildlife habitats. Its location in Madison makes it an important structure for the local government and the community.
With its historical significance and vital role in flood risk reduction, Wesserunsett is a key feature in the water resource management of the region. As climate change continues to impact water resources, the proper maintenance and regulation of dams like Wesserunsett are essential to ensure the safety and sustainability of water systems in Somerset County, Maine.
Year Completed |
1800 |
Dam Length |
147 |
Dam Height |
11 |
River Or Stream |
Mill Stream |
Primary Dam Type |
Concrete |
Surface Area |
1446 |
Hydraulic Height |
11 |
Drainage Area |
18.1 |
Nid Storage |
12550 |
Structural Height |
11 |
Hazard Potential |
High |
Nid Height |
11 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Carrabassett River Near North Anson
|
304cfs |
Sandy River Near Mercer
|
326cfs |
Kennebec River At Bingham
|
1990cfs |
Austin Stream At Bingham
|
55cfs |
Kennebec River At North Sidney
|
2360cfs |
Kingsbury Stream At Abbot Village
|
60cfs |
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.
Wesserunsett