Bog Brook Dam #2 Reservoir Report

Last Updated: December 5, 2025

Bog Brook Dam #2, located in Brewster, New York, is a key water supply infrastructure managed by the local government.


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Summary

Constructed in 1936, this earth dam stands at a height of 24 feet and has a length of 1956 feet, with a storage capacity of 17,130 acre-feet. The dam serves the primary purpose of water supply, drawing water from the TR-East Branch Croton River to meet the needs of the surrounding area.

Despite being classified as having a high hazard potential, the condition assessment of Bog Brook Dam #2 is reported as satisfactory as of November 2018. Regular inspections are conducted, with the most recent one taking place in March 2020. The dam is regulated by the New York State Department of Environmental Conservation, ensuring that it meets state permitting, inspection, and enforcement requirements. In the event of an emergency, the dam's Emergency Action Plan (EAP) is expected to be in place, with the last revision conducted in July 2020.

With its crucial role in water supply and the potential risks associated with its operation, Bog Brook Dam #2 represents a significant piece of infrastructure in the region. Its maintenance and regulatory oversight are vital to ensure the safety and security of the surrounding communities and the sustainability of water resources in the area. For water resource and climate enthusiasts, understanding the complexities of managing such dams is integral to fostering resilience in the face of changing environmental conditions.

Year Completed

1936

Dam Length

1956

Dam Height

24

River Or Stream

TR-EAST BRANCH CROTON RIVER

Primary Dam Type

Earth

Surface Area

399

Drainage Area

3.73

Nid Storage

17130

Hazard Potential

High

Nid Height

24
       
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.