East Inlet Dam Reservoir Report

Last Updated: December 12, 2025

East Inlet Dam, located in Pittsburg, New Hampshire, is a state-owned structure regulated by the NHDES Dam Bureau.


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Summary

Built in 1900, this Earth dam stands at a height of 13 feet and spans 320 feet across the East Inlet river. With a storage capacity of 979 acre-feet and a surface area of 91.81 acres, the dam primarily serves recreational purposes for the community.

Despite being classified as having a low hazard potential, the dam's condition assessment in 2016 rated it as fair. The inspection frequency is every 6 years, with the last assessment conducted in October 2016. With a moderate risk level, the dam's risk management measures and emergency preparedness protocols are not explicitly listed in the data. However, the structure's purpose of providing recreational opportunities aligns with the surrounding natural environment, making it a popular destination for water resource and climate enthusiasts to explore.

East Inlet Dam's location within the Coos County of New Hampshire offers a picturesque setting for visitors to enjoy the beauty of the East Inlet river. While the dam's spillway type is listed as uncontrolled, its maximum discharge capacity of 2456 cfs ensures the safety and stability of the structure. With its historical significance dating back over a century, East Inlet Dam continues to be a vital part of the local landscape, providing both recreational opportunities and a source of fascination for those interested in water resource management and climate dynamics.

Year Completed

1900

Dam Length

320

Dam Height

13

River Or Stream

EAST INLET

Primary Dam Type

Earth

Surface Area

91.81

Drainage Area

13.23

Nid Storage

979

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

13
       
Seasonal Comparison

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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.