Thorndike Pond Dam Reservoir Report
Nearby: Gilson Pond Dam Poole Reservoir Dam
Last Updated: December 19, 2025
Thorndike Pond Dam, located in Dublin, New Hampshire, was completed in 1915 and serves as a recreational resource for the community.
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Summary
The concrete dam stands at a height of 12.5 feet and has a length of 175 feet, creating a storage capacity of 2210 acre-feet. The dam is regulated by the New Hampshire Department of Environmental Services Dam Bureau and undergoes regular inspections to ensure its structural integrity.
Despite being classified as having a low hazard potential, Thorndike Pond Dam is considered to be in satisfactory condition. The dam's spillway, an uncontrolled type, has a width of 18 feet and is designed to handle a maximum discharge of 853 cubic feet per second. The dam's risk assessment is moderate, indicating a moderate level of potential risk associated with the structure.
Overall, Thorndike Pond Dam serves as a vital recreational and water resource for the surrounding area, providing both storage capacity and flood control measures. With its historical significance and ongoing regulatory oversight, the dam continues to play a crucial role in the management of water resources in Cheshire County, New Hampshire.
Year Completed |
1915 |
Dam Length |
175 |
Dam Height |
12.5 |
River Or Stream |
STANLEY BROOK |
Primary Dam Type |
Concrete |
Surface Area |
265 |
Drainage Area |
3.87 |
Nid Storage |
2210 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
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.
Thorndike Pond Dam
Thorndike Pond boat launch