Upper (North) Wiccopee Dam Reservoir Report

Last Updated: December 5, 2025

The Upper (North) Wiccopee Dam is a concrete structure located in Tompkins Corners, Putnam, New York, and was completed in 1939 for the primary purpose of water supply.


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Summary

With a height of 34 feet and a length of 212 feet, the dam has a storage capacity of 2103 acre-feet, with a normal storage level of 1570 acre-feet. The dam is situated on Wiccopee Brook and has a drainage area of 2.27 square miles.

Despite being classified as having a high hazard potential, the dam's condition assessment is currently marked as "Not Rated." The dam features an uncontrolled spillway with a width of 154 feet and a maximum discharge capacity of 3874 cubic feet per second. The risk assessment for the dam is considered moderate, with emergency action plans last revised in January 2020. The dam's inspection frequency is every two years, with the last inspection conducted in May 2019.

Overall, the Upper (North) Wiccopee Dam serves as a crucial water supply structure in the region, providing storage capacity and flood control measures along Wiccopee Brook. Its historical significance and engineering design make it a key asset for water resource and climate enthusiasts interested in the management and maintenance of dams in the area.

Year Completed

1939

Dam Length

212

Dam Height

34

River Or Stream

WICCOPEE BROOK

Primary Dam Type

Concrete

Surface Area

153.1

Drainage Area

2.27

Nid Storage

2103

Hazard Potential

High

Nid Height

34
       
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.