Jones Pond Reservoir Report

Last Updated: December 21, 2025

Jones Pond in Hancock, Maine, is a privately owned reservoir that serves multiple purposes, including flood risk reduction, fish and wildlife habitat, and recreation.


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Summary

Built in 1920, this concrete dam stands at a height of 7 feet and has a hydraulic height of 5 feet. With a storage capacity of 4408 acre-feet and a surface area of 467 acres, Jones Pond plays a crucial role in managing water resources in the area.

Managed by the Maine Emergency Management Agency, Jones Pond is under state jurisdiction and is subject to regulation, permitting, inspection, and enforcement. Despite its low hazard potential, the condition of the dam is currently not rated. The reservoir's spillway width is 15 feet, and it is equipped to handle potential emergencies effectively. While the dam has not been modified in recent years, it is important for water resource and climate enthusiasts to stay informed about its risk management measures and emergency preparedness protocols.

Located near Jones Stream, this significant water infrastructure is a key component of flood risk reduction efforts in the region. With its historical significance and multifaceted purposes, Jones Pond serves as a valuable asset for both the local community and the broader ecosystem. As climate change continues to pose challenges for water management, understanding and monitoring the condition of dams like Jones Pond is essential for ensuring the safety and sustainability of water resources in the area.

Year Completed

1920

Dam Length

15

Dam Height

7

River Or Stream

Jones Stream

Primary Dam Type

Concrete

Surface Area

467

Hydraulic Height

5

Nid Storage

4408

Structural Height

7

Hazard Potential

Low

Nid Height

7
       
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.