Charlestown Ww Lagoon Dam Reservoir Report
Nearby: Muckross Hall Pond Dam
Last Updated: December 13, 2025
Located in Charlestown, New Hampshire, the Charlestown Ww Lagoon Dam is a significant earth dam completed in 1996 with a height of 4.5 meters.
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Summary
Managed by the local government, this dam serves a primary purpose other than flood control or irrigation, with a normal storage capacity of 6.35 million cubic meters and a maximum storage of 17.35 million cubic meters. The dam spans a length of 2200 meters and covers a surface area of 5.5 hectares.
Regulated by the New Hampshire Department of Environmental Services Dam Bureau, the Charlestown Ww Lagoon Dam poses a significant hazard potential, with a high risk assessment rating. Despite this, the dam's condition was assessed as satisfactory during the last inspection in July 2017. The dam does not have a spillway, and there are no associated locks or outlet gates. The risk management measures for this dam have not been specified, and there are no emergency action plans in place as of the latest data update in June 2018.
Water resource and climate enthusiasts interested in the Charlestown Ww Lagoon Dam will find it intriguing due to its unique design as an earth dam with a buttress core type. The dam's location in Sullivan County, New Hampshire, and its proximity to the city of Charlestown make it a focal point for studying the impact of dams on local water resources and the environment. The presence of a significant hazard potential and high risk assessment highlight the importance of ongoing monitoring and maintenance to ensure the safety and integrity of the Charlestown Ww Lagoon Dam in the face of changing climate conditions.
Year Completed |
1996 |
Dam Length |
2200 |
Dam Height |
4.5 |
River Or Stream |
NA |
Primary Dam Type |
Earth |
Surface Area |
5.5 |
Nid Storage |
17.35 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
5 |
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.
Charlestown Ww Lagoon Dam
Connecticut River boat launch