Turtle Pond Dam Reservoir Report
Last Updated: December 18, 2025
Turtle Pond Dam, also known as Turtletown Pond Dam, is located in Concord, New Hampshire, on TR Mill Brook.
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Summary
This local government-owned structure was completed in 1939 and serves primarily for recreational purposes. The dam, standing at a height of 8 feet and a length of 125 feet, has a storage capacity of 864 acre-feet and covers a surface area of 159 acres.
Despite its low hazard potential, Turtle Pond Dam is currently assessed as being in poor condition, with the last inspection in September 2017 highlighting the need for maintenance and improvements. The dam is regulated by the New Hampshire Department of Environmental Services Dam Bureau, with state permitting, inspection, and enforcement in place to ensure the safety and integrity of the structure. The risk assessment for the dam is moderate, indicating the need for ongoing monitoring and management measures to mitigate any potential risks.
For water resource and climate enthusiasts, Turtle Pond Dam offers a fascinating case study in dam infrastructure management and risk assessment. As a recreational structure with historical significance, the dam's condition and maintenance needs provide valuable insights into the challenges faced by aging infrastructure in ensuring public safety and environmental protection. With state regulation and oversight in place, there is an opportunity for stakeholders to collaborate on implementing risk management measures to preserve the dam for future generations while maintaining the balance between human use and ecological sustainability.
Year Completed |
1939 |
Dam Length |
125 |
Dam Height |
8 |
River Or Stream |
TR MILL BROOK |
Primary Dam Type |
Earth |
Surface Area |
159 |
Drainage Area |
4.99 |
Nid Storage |
864 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
8 |
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.
Turtle Pond Dam
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