Pierce Pond Dam Reservoir Report

Last Updated: December 16, 2025

Pierce Pond Dam, located in Brookline, New Hampshire, is a local government-owned structure on Wolf Brook with a primary purpose of recreation.


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Summary

Built in 1934, this earth dam stands at a height of 8 feet and a length of 100 feet, providing a storage capacity of 32.5 acre-feet. Despite its small size, the dam has a high hazard potential and is classified as in poor condition as of 2013.

The dam's spillway is uncontrolled with a width of 20 feet, allowing for a maximum discharge of 458 cubic feet per second. The surrounding area covers 7 acres with a drainage area of 1.7 square miles. With a risk assessment rating of moderate (3), there is a need for regular inspections and maintenance to ensure the safety of the dam and the surrounding community. The NHDES DAM BUREAU in New Hampshire oversees the regulation, permitting, inspection, and enforcement of this structure.

Water resource and climate enthusiasts can appreciate the historical significance and recreational value of Pierce Pond Dam, while also recognizing the importance of maintaining and monitoring its condition to prevent any potential hazards or risks. The dam's location in a picturesque setting and its role in providing recreational opportunities make it a valuable asset to the community. However, continued oversight and investment in the dam's maintenance are essential to ensure its long-term sustainability and safety for all who enjoy its benefits.

Year Completed

1934

Dam Length

100

Dam Height

8

River Or Stream

WOLF BROOK

Primary Dam Type

Earth

Surface Area

7

Drainage Area

1.7

Nid Storage

32.5

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

8
       
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.
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Area Campgrounds