Ladner Pond Dam Reservoir Report

Last Updated: December 5, 2025

Ladner Pond Dam, also known as Ladner Pond Altermatt Pond, is a privately owned structure located in New Milford, Connecticut.


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Summary

Built in 1965 by the USDA NRCS, this earth dam stands at a height of 18 feet and stretches 350 feet in length, creating a surface area of 15 acres and a storage capacity of 112 acre-feet. The primary purpose of Ladner Pond Dam is for recreation, offering a serene spot for water resource and climate enthusiasts to enjoy.

Situated on the West Aspetuck River Tributary, Ladner Pond Dam is regulated by the Connecticut Department of Energy and Environmental Protection (DEEP) and is subject to state permitting, inspection, and enforcement. With a spillway width of 6 feet and a maximum discharge capacity of 368 cubic feet per second, this dam poses a significant hazard potential, although its condition was assessed as satisfactory during the last inspection in November 2015. The risk assessment for Ladner Pond Dam indicates a moderate risk level, highlighting the importance of ongoing risk management measures to ensure the safety and integrity of this vital water resource structure.

For those interested in the intersection of water resources, climate, and infrastructure, Ladner Pond Dam provides a fascinating case study in dam construction and management. As a key feature in the New Milford landscape, this earth dam serves both recreational and regulatory purposes, underscoring the complexities of balancing human enjoyment with environmental protection. With its rich history, technical specifications, and risk profile, Ladner Pond Dam offers a compelling opportunity for further exploration and analysis by water resource and climate enthusiasts alike.

Year Completed

1965

Dam Length

350

Dam Height

18

River Or Stream

WEST ASPETUCK R TRIB

Primary Dam Type

Earth

Surface Area

15

Drainage Area

0.19

Nid Storage

112

Outlet Gates

Valve

Hazard Potential

Significant

Foundations

Soil

Nid Height

18
       
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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.