Middle Pond Reservoir Report

Last Updated: December 19, 2025

Middle Pond, located in York, Maine, is a concrete dam built in 1901 primarily for water supply purposes.


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Summary

The dam stands at a height of 35 feet and has a hydraulic height of 30 feet, with a storage capacity of 920 acre-feet. With a surface area of 77 acres and a drainage area of 1.2 square miles, Middle Pond is a crucial resource for the local community in providing clean and reliable water.

Managed by the Maine Emergency Management Agency (MEMA) and classified as a significant hazard potential, Middle Pond's condition was last assessed as satisfactory in 2017. The dam's inspection frequency is every 6 years, with the most recent inspection conducted in November 2017. Despite its age, Middle Pond continues to serve its purpose effectively, ensuring the water supply needs of the area are met. With its picturesque location along Cider Hill Creek, Middle Pond is not only a vital water resource but also a scenic spot for water resource and climate enthusiasts to admire and appreciate.

Year Completed

1901

Dam Length

517

Dam Height

35

River Or Stream

Cider Hill Creek

Primary Dam Type

Concrete

Surface Area

77

Hydraulic Height

30

Drainage Area

1.2

Nid Storage

920

Structural Height

35

Hazard Potential

Significant

Nid Height

35
       
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.