Wilson Pond Reservoir Report

Last Updated: December 18, 2025

Wilson Pond in Maine is a privately owned reservoir with a primary purpose of hydroelectric power generation.


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Summary

The dam, completed in 1907, stands at a height of 12 feet and has a storage capacity of 12,544 acre-feet. The pond covers an area of 2,320 acres and is fed by the Big Wilson Stream, with a drainage area of 50 square miles.

Despite its historic significance and contribution to renewable energy production, Wilson Pond faces challenges in terms of its condition assessment, which is rated as poor. The dam's hazard potential is deemed significant, highlighting the need for regular inspections and maintenance. The last inspection in October 2019 revealed the need for improvement, indicating potential risks that require attention to ensure the safety and integrity of the structure.

Located in Piscataquis County, Wilson Pond serves as a key water resource for the region, emphasizing the importance of effective risk management measures and emergency preparedness. With its outdated condition assessment and significant hazard potential, stakeholders must prioritize safety protocols and invest in the necessary upgrades to safeguard this vital water source for future generations.

Year Completed

1907

Dam Length

175

Dam Height

12

River Or Stream

Big Wilson Stream

Primary Dam Type

Concrete

Surface Area

2320

Hydraulic Height

10

Drainage Area

50

Nid Storage

12544

Structural Height

12

Hazard Potential

Significant

Nid Height

12
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.