Mt Carberry Leachate Pond Dam Reservoir Report

Last Updated: December 17, 2025

The Mt Carberry Leachate Pond Dam, located in Success, New Hampshire, is a privately owned structure regulated by the NHDES DAM BUREAU.


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Summary

This earth dam with a buttress core type stands at 5.25 feet high and spans a length of 300 feet. It serves a primary purpose of "Other" and has a storage capacity of 5.1 acre-feet. The dam has an uncontrolled spillway with a width of 18 feet and a maximum discharge of 3.1 cubic feet per second.

Despite its satisfactory condition assessment as of July 2016, the Mt Carberry Dam is classified as having a significant hazard potential. The risk assessment for the dam is moderate, with a risk level of 3 out of a possible 5. The last inspection was conducted in June 2020, with a frequency of 4 years. The dam has not been modified in recent years, and there are no emergency action plans in place as of the latest data update in March 2021.

For water resource and climate enthusiasts, the Mt Carberry Leachate Pond Dam represents a critical piece of infrastructure in the Coos County area of New Hampshire. With its unique design features and regulatory oversight by the NHDES, this dam serves an important role in managing water resources in the region. However, its significant hazard potential and moderate risk level highlight the importance of continued monitoring and maintenance to ensure the safety and integrity of the structure for the surrounding community and environment.

Dam Length

300

Dam Height

5.25

River Or Stream

NA

Primary Dam Type

Earth

Surface Area

0.9

Nid Storage

5.1

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

5
       
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.