Athens Water Supply Dam Reservoir Report

Last Updated: December 7, 2025

Athens Water Supply Dam, also known as Hollister Lake, is a vital water resource located in Greene, New York.


°F

°F

mph

Wind

%

Humidity

Summary

This local government-owned dam was completed in 1925 and serves as a key water supply for the area, with a storage capacity of 160 acre-feet and a normal storage level of 140 acre-feet. The dam, standing at a height of 8 feet and a length of 250 feet, harnesses the waters of the HANS VOSEN KILL river to provide essential water for the community.

Despite its age, Athens Water Supply Dam is in satisfactory condition and has a significant hazard potential, highlighting the importance of regular inspections and maintenance. The dam features an uncontrolled spillway with a width of 27 feet and a maximum discharge capacity of 81 cubic feet per second. The risk assessment for the dam is moderate, with a DSAC assigned date yet to be determined, emphasizing the need for ongoing risk management measures to ensure the safety and stability of the structure.

With its crucial role in providing water for the residents of Limestreet and surrounding areas, Athens Water Supply Dam stands as a testament to the importance of effective water resource management. As a state-regulated and inspected dam, it serves as a lifeline for the community, reflecting the intersection of water resource sustainability and climate resilience. By maintaining the dam's infrastructure and implementing necessary risk management measures, the local government can continue to safeguard this essential water supply for future generations.

Year Completed

1925

Dam Length

250

Dam Height

8

River Or Stream

HANS VOSEN KILL

Primary Dam Type

Earth

Surface Area

50

Drainage Area

1.75

Nid Storage

160

Hazard Potential

Significant

Nid Height

8
       
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.