Cole Pond Dam Reservoir Report
Last Updated: December 19, 2025
Cole Pond Dam, located in Andover, New Hampshire, is a private concrete dam constructed in 1973 primarily for recreational purposes.
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Summary
The dam spans 110 feet in length and stands at a height of 10 feet, with a storage capacity of 131.15 acre-feet and a surface area of 14.6 acres. Despite its low hazard potential, the dam's condition has been assessed as poor, with the last inspection taking place in November 2016.
Managed by the NHDES Dam Bureau, Cole Pond Dam is state-regulated, permitted, inspected, and enforced. The dam's spillway type is uncontrolled, with a width of 24 feet. While the dam poses a moderate risk, with a risk assessment rating of 3, there are currently no emergency action plans (EAP) in place. With its location on the TR Black River and close proximity to Merrimack County, water resource and climate enthusiasts may find the dam's historical data and regulatory framework of interest for further study and monitoring.
Year Completed |
1973 |
Dam Length |
110 |
Dam Height |
10 |
River Or Stream |
TR BLACK RIVER |
Primary Dam Type |
Concrete |
Surface Area |
14.6 |
Drainage Area |
1.08 |
Nid Storage |
131.15 |
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.
Cole Pond Dam
Adder Pond boat launch
Begins In Franklin To Sewall'S Island