Wolfeboro Sewage Lagoon Dam Reservoir Report

Last Updated: December 15, 2025

The Wolfeboro Sewage Lagoon Dam in New Hampshire, completed in 1975, serves as a crucial structure owned by the local government to regulate water resources in the area.


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Summary

With a maximum storage capacity of 314 acre-feet and a normal storage capacity of 273 acre-feet, this earth dam stands at a height of 45 feet and spans an impressive length of 1875 feet. The dam's primary purpose is designated as "Other," and it boasts a satisfactory condition assessment as of May 2016.

Despite its satisfactory condition, the Wolfeboro Sewage Lagoon Dam is categorized with a high hazard potential, indicative of the importance of ongoing monitoring and risk management. The dam falls under the regulatory oversight of the New Hampshire Department of Environmental Services Dam Bureau, which conducts regular inspections and enforces compliance to ensure public safety. The dam's location in Carroll County underscores its critical role in water resource management for the city of Wolfeboro and the surrounding area.

As climate change continues to impact water resources and infrastructure, the Wolfeboro Sewage Lagoon Dam remains a vital component of the local water management system. With a high risk assessment score and the absence of a spillway, it is essential for stakeholders to prioritize ongoing maintenance, emergency preparedness, and risk mitigation strategies to safeguard the surrounding community and preserve the dam's integrity in the face of evolving environmental challenges.

Year Completed

1975

Dam Length

1875

Dam Height

45

River Or Stream

NA

Primary Dam Type

Earth

Surface Area

14

Drainage Area

0.01

Nid Storage

314

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

45
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.