Ashuelot Pond Dam Reservoir Report

Last Updated: December 14, 2025

Ashuelot Pond Dam, located in Washington, New Hampshire, along the Ashuelot River, is a key structure managed by the local government for recreational purposes.


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Summary

Built in 1872, this earth dam stands at a height of 13 feet and stretches 190 feet in length, providing a storage capacity of 3,588 acre-feet. The dam's primary purpose is to create Ashuelot Pond, covering a surface area of 360 acres and serving as a popular recreational spot for water enthusiasts.

Maintained and regulated by the New Hampshire Department of Environmental Services Dam Bureau, Ashuelot Pond Dam has a significant hazard potential but is currently assessed to be in fair condition. With a moderate risk rating, the dam undergoes inspections every four years to ensure its structural integrity and safety. Although the spillway type is uncontrolled, the dam's operations are closely monitored to mitigate risks and protect downstream communities in case of emergencies.

For water resource and climate enthusiasts, Ashuelot Pond Dam represents a historic landmark that not only offers recreational opportunities but also serves as a crucial piece of infrastructure in managing water resources in the region. As efforts continue to ensure the dam's safety and functionality, its presence highlights the balance between human recreation and environmental stewardship in maintaining sustainable water systems.

Year Completed

1872

Dam Length

190

Dam Height

13

River Or Stream

ASHUELOT RIVER

Primary Dam Type

Earth

Surface Area

360

Drainage Area

26.1

Nid Storage

3588

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

13
       
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.