Hall Pond Dike Reservoir Report
Nearby: Hall Pond Dam Paul Colsmann Dam I
Last Updated: December 13, 2025
Hall Pond Dike in Charlestown, New Hampshire, is a local government-owned structure designed for recreation purposes.
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Summary
Completed in 1955, this earth dike stands at 7 feet high and spans 264 feet in length, with a storage capacity of 59 acre-feet. The dam regulates Clay Brook and is under the jurisdiction of the NHDES Dam Bureau, with state-regulated permitting, inspection, and enforcement in place to ensure public safety.
Despite its low hazard potential and satisfactory condition, Hall Pond Dike poses a high risk due to its location and the potential impact of a breach. With a drainage area of 0.82 square miles, the dike's maximum discharge capacity and lack of a spillway raise concerns for effective flood control. Regular inspections are conducted every 6 years to monitor the structure's integrity, highlighting the importance of risk assessment and management measures for water resource and climate enthusiasts in the area.
Year Completed |
1955 |
Dam Length |
264 |
Dam Height |
7 |
River Or Stream |
CLAY BROOK |
Primary Dam Type |
Earth |
Surface Area |
15.6 |
Drainage Area |
0.82 |
Nid Storage |
59 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
7 |
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.
Hall Pond Dike
Connecticut River boat launch