Rockingham Cnty Wastewtr Lagoon Dam Reservoir Report
Last Updated: December 15, 2025
Located in Rockingham County, New Hampshire, the Rockingham Cnty Wastewtr Lagoon Dam is a significant earth dam completed in 1990 with a height of 13 feet and a length of 1920 feet.
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Summary
This dam serves a primary purpose of "Other" and is owned by the local government, with state regulation and oversight provided by the NHDES DAM BUREAU. The dam has a significant hazard potential and a satisfactory condition assessment as of the last inspection in 2013.
With a storage capacity of 63.07 acre-feet and a surface area of 5.24 acres, the Rockingham Cnty Wastewtr Lagoon Dam plays a crucial role in managing water resources in the area. Despite its high hazard potential, the dam meets regulatory guidelines and has not experienced any significant modifications or incidents in recent years. Emergency action plans for the dam are yet to be prepared, highlighting the need for proactive risk management measures to ensure the safety and integrity of the structure in the face of potential climate-related challenges.
Year Completed |
1990 |
Dam Length |
1920 |
Dam Height |
13 |
River Or Stream |
NA |
Primary Dam Type |
Earth |
Surface Area |
5.24 |
Nid Storage |
63.07 |
Hazard Potential |
Significant |
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.
Rockingham Cnty Wastewtr Lagoon Dam
Greenwood Pond boat launch