Rollins Pond Dam Reservoir Report
Last Updated: December 17, 2025
Rollins Pond Dam, located in Gilmanton, New Hampshire, is a privately-owned structure built in 1800 primarily for recreational purposes.
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Summary
Situated on Kelley Brook, the earth dam stands at a height of 17 feet and has a length of 192 feet, creating a surface area of 37 acres and a storage capacity of 250 acre-feet. While the dam's spillway type is uncontrolled, its hazard potential is assessed as low, with a moderate risk level.
Despite its historical significance, Rollins Pond Dam is currently in poor condition, as indicated by its last inspection in December 2016. The dam is regulated by the NHDES Dam Bureau and undergoes regular state inspections, permitting, and enforcement to ensure its safety and compliance. While the dam's risk management measures and emergency preparedness remain unclear, its risk assessment suggests a moderate level of potential hazards.
For water resource and climate enthusiasts, Rollins Pond Dam presents an intriguing case study of a historic earth dam designed for recreational use. As efforts are made to address its poor condition and mitigate potential risks, the dam serves as a reminder of the importance of proactive maintenance and management in preserving both infrastructure and natural resources in the face of changing environmental conditions.
Year Completed |
1800 |
Dam Length |
192 |
Dam Height |
17 |
River Or Stream |
KELLEY BROOK |
Primary Dam Type |
Earth |
Surface Area |
37 |
Drainage Area |
1.94 |
Nid Storage |
250 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Suncook River At North Chichester
|
62cfs |
Soucook River
|
22cfs |
Winnipesaukee River At Tilton
|
85cfs |
Merrimack River At Franklin Junction
|
857cfs |
Blackwater River Near Webster
|
19cfs |
Warner River At Davisville
|
50cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Rollins Pond Dam
Rollins Pond boat launch
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