Sand Pond Dam Reservoir Report
Last Updated: December 19, 2025
Sand Pond Dam in Troy, New Hampshire, stands as a vital structure regulated by the NHDES Dam Bureau, serving the primary purpose of recreation since its completion in 1927.
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Summary
This earth dam, with a height of 9.5 feet and a length of 349 feet, creates a reservoir with a normal storage capacity of 35 acre-feet and a drainage area of 3.8 square miles. The dam's spillway, of uncontrolled type, boasts a width of 53 feet and a maximum discharge of 693 cubic feet per second, ensuring the safety and stability of the surrounding area.
Despite its low hazard potential and moderate risk assessment, Sand Pond Dam remains a focal point for climate and water resource enthusiasts, offering a unique blend of recreational opportunities and environmental significance. The dam's condition, not yet rated, prompts ongoing inspection and monitoring, with a last inspection date of October 28, 2020. While the dam's Emergency Action Plan status and risk management measures remain unlisted, the dam's historical significance and impact on the local ecosystem make it a crucial site for continued study and conservation efforts.
Overall, Sand Pond Dam stands as a testament to New Hampshire's commitment to water resource management and dam safety, with its recreational value complemented by its role in environmental protection and preservation. As climate change poses new challenges to water infrastructure, Sand Pond Dam serves as a symbol of resilience and adaptability, embodying the state's dedication to ensuring the safety and sustainability of its water resources for generations to come.
Year Completed |
1927 |
Dam Length |
349 |
Dam Height |
9.5 |
River Or Stream |
SAND POND |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
3.8 |
Nid Storage |
55 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Swanzey Lake Camping Area
Pilgrim Pines Camping Area
Mt Monadnock State Park Campground
Camp Wanocksett
Falls Brook Shelter
Wheelock Park Campground
Sand Pond Dam
Perkins Pond boat launch