Vincent Manzo Dam & Dike Reservoir Report

Last Updated: December 6, 2025

Vincent Manzo Dam & Dike, located in Garrattsville, New York, is a privately owned structure built in 1967 primarily for recreational purposes.


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Summary

Situated on the Butternut Creek, this earth dam stands at a height of 18 feet and stretches for 250 feet in length, with a storage capacity of 64 acre-feet. The dam's spillway, with a width of 52 feet, is uncontrolled, and the maximum discharge capacity is 235 cubic feet per second.

Although the hazard potential is classified as low, the risk assessment for the dam is moderate. The dam has not been rated for its condition, and the last inspection was conducted in July 1996. The regulatory oversight and enforcement of the dam fall under the purview of the New York State Department of Environmental Conservation. While the dam has not undergone any significant modifications over the years, it remains a key structure in the management of water resources in the area.

Despite its low hazard potential, the Vincent Manzo Dam & Dike plays a crucial role in the recreational activities and water resource management of the region. With its tranquil surroundings and strategic location, this dam serves as a vital infrastructure for the local community while also posing a moderate risk that requires ongoing monitoring and assessment to ensure its safety and functionality in the face of potential climate challenges.

Year Completed

1967

Dam Length

250

Dam Height

18

River Or Stream

TR-BUTTERNUT CREEK

Primary Dam Type

Earth

Surface Area

10

Drainage Area

0.12

Nid Storage

64

Hazard Potential

Low

Nid Height

18
       
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.