Century Village Dam Reservoir Report

Last Updated: December 17, 2025

The Century Village Dam, located in Londonderry, New Hampshire, was completed in 1988 and serves primarily for recreation purposes.


°F

°F

mph

Wind

%

Humidity

Summary

Owned privately, the dam is regulated by the NHDES Dam Bureau and is subject to state jurisdiction, permitting, inspection, and enforcement. With a height of 8 feet and a length of 200 feet, the dam has a storage capacity of 50 acre-feet and covers a surface area of 7 acres.

Despite being classified as having a significant hazard potential, the dam is currently assessed to be in fair condition. The last inspection in August 2017 found the structure to be functioning adequately. Although the dam has an uncontrolled spillway type and no outlet gates, its risk assessment is categorized as moderate. The surrounding area is at risk of inundation, but no specific measures for risk management or emergency action planning have been disclosed.

Water resource and climate enthusiasts interested in the Century Village Dam will find a unique case study in dam management and recreational use in New Hampshire. The dam's presence along an unnamed stream in Rockingham County highlights the importance of regulating private dams to ensure public safety and environmental protection. As a significant hazard potential structure, the Century Village Dam serves as a reminder of the importance of ongoing maintenance and risk assessment in the management of water resources and infrastructure.

Year Completed

1988

Dam Length

200

Dam Height

8

River Or Stream

UNNAMED STREAM

Primary Dam Type

Earth

Surface Area

7

Drainage Area

1.9

Nid Storage

50

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

8
       
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.