Lower Hadlock Pond Reservoir Report

Last Updated: December 21, 2025

Lower Hadlock Pond in Hancock, Maine, is a concrete dam built in 1934 primarily for water supply purposes.


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Summary

The dam stands at a height of 12 feet and has a hydraulic height of 10 feet, with a length of 320 feet. The pond has a storage capacity of 180 acre-feet, with a normal storage level of 126 acre-feet and a surface area of 37 acres. The dam is regulated by the Maine Emergency Management Agency and undergoes regular inspections to ensure its satisfactory condition and low hazard potential.

Located on Hadlock Brook, Lower Hadlock Pond provides a vital water source for the surrounding area. The dam is state-regulated and permitted, with enforcement and inspection measures in place to ensure its safety and functionality. Despite its age, the dam has been well-maintained and meets regulatory guidelines, with a last inspection date in August 2018 and a condition assessment date in October 2010. The pond serves as a crucial resource for water supply and contributes to the overall water management system in the region.

Lower Hadlock Pond not only fulfills its primary purpose of water supply but also adds to the scenic beauty of the landscape. With its concrete structure and gravity design, the dam has stood the test of time and continues to provide a reliable source of water for the community. Managed by a public utility, the pond's associated structures are well-maintained, and the dam's risk assessment remains low, ensuring the safety and security of this essential water resource for years to come.

Year Completed

1934

Dam Length

320

Dam Height

12

River Or Stream

Hadlock Brook

Primary Dam Type

Concrete

Surface Area

37

Hydraulic Height

10

Drainage Area

1.2

Nid Storage

180

Structural Height

12

Hazard Potential

Low

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.