Stinson Lake Dam Reservoir Report

Last Updated: December 16, 2025

Stinson Lake Dam, located in Rumney, New Hampshire, is a state-owned structure with a primary purpose of recreation.


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Summary

Built in 1955, this earth-type dam stands at 7.75 feet tall and stretches 158 feet in length, creating a reservoir with a capacity of 1930 acre-feet. The dam is regulated by the NHDES Dam Bureau and undergoes regular state inspections, with a low hazard potential and a satisfactory condition assessment.

The dam, situated on Stinson Brook, serves as a vital resource for the local community, offering opportunities for recreational activities such as fishing, boating, and wildlife watching. With a surface area of 346 acres and a drainage area of 8 square miles, the dam contributes to the natural landscape and biodiversity of the region. Despite its moderate risk assessment, the dam's risk management measures ensure the safety and security of the surrounding area in case of emergencies.

Overall, Stinson Lake Dam is a key infrastructure that not only provides recreational benefits but also plays a crucial role in water resource management and climate resilience in Grafton County, New Hampshire. Its impressive history, design, and regulatory oversight make it a noteworthy site for water resource and climate enthusiasts to explore and appreciate.

Year Completed

1955

Dam Length

158

Dam Height

7.75

River Or Stream

STINSON BROOK

Primary Dam Type

Earth

Surface Area

346

Drainage Area

8

Nid Storage

1930

Hazard Potential

Low

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.