Wyman Reservoir Report
Nearby: Williams Hancock Pond
Last Updated: December 19, 2025
Wyman, a private hydroelectric dam located in Bingham, Maine, harnesses the power of the Kennebec River to generate clean energy.
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Summary
Completed in 1930, this Earth-type dam stands at 155 feet tall and stretches across 3054 feet, with a storage capacity of 208,910 acre-feet. With a maximum discharge of 59,630 cubic feet per second, the dam plays a crucial role in controlling water flow to prevent flooding and provide a reliable source of renewable electricity.
Managed by the Federal Energy Regulatory Commission, Wyman has a high hazard potential due to its size and location, but its risk is mitigated through regular inspections and emergency preparedness measures. While its condition assessment is not available, the dam's emergency action plan was last revised in December 2019 to meet federal guidelines. With a very high risk rating of 1, Wyman remains a key player in the region's water resource management and climate resilience efforts, highlighting the importance of sustainable infrastructure in the face of environmental challenges.
Year Completed |
1930 |
Dam Length |
3054 |
Dam Height |
155 |
River Or Stream |
Kennebec River |
Primary Dam Type |
Earth |
Surface Area |
3240 |
Drainage Area |
2619 |
Nid Storage |
208910 |
Outlet Gates |
Needle - 6, Other Controlled - 1, Slide (sluice gate) - 1, Tainter (radial) - 3 |
Hazard Potential |
High |
Nid Height |
155 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Austin Stream At Bingham
|
55cfs |
Kennebec River At Bingham
|
2680cfs |
Carrabassett River Near North Anson
|
304cfs |
Dead River Near Dead River
|
786cfs |
Kennebec River At The Forks
|
660cfs |
Piscataquis River At Blanchard
|
67cfs |
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.
Wyman