Muscoot Dam Reservoir Report

Last Updated: December 5, 2025

Muscoot Dam, located in Stanwood, Westchester County, New York, was completed in 1906 and is owned by the local government.


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Summary

It serves as a vital water supply infrastructure along the Croton River, with a primary purpose of providing water storage. The dam stands at a height of 57 feet, with a length of 1130 feet and a storage capacity of 15,000 acre-feet.

With a significant hazard potential, Muscoot Dam is regulated by the New York State Department of Environmental Conservation (NYS DEC) and undergoes regular inspections to ensure its structural integrity. The dam features a controlled spillway that can handle a maximum discharge of 96,000 cubic feet per second, making it a crucial component of the region's water resource management system. Despite its very high risk assessment, the dam's condition is currently not rated, highlighting the importance of ongoing monitoring and maintenance to safeguard against potential hazards and ensure the continued supply of clean water to the surrounding communities.

Year Completed

1906

Dam Length

1130

Dam Height

57

River Or Stream

CROTON RIVER

Primary Dam Type

Masonry

Surface Area

1166

Drainage Area

316

Nid Storage

15000

Hazard Potential

Significant

Nid Height

57
       
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.