Clarks Mills Lower Reservoir Report
Nearby: Clark Mills Upper Northumberland Dam
Last Updated: December 16, 2025
Clarks Mills Lower, also known as Easton Mill Dam, is a private hydroelectric structure located on the Battenkill River in Easton, New York.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1910, this concrete dam stands at a height of 20 feet and has a length of 300 feet, providing a storage capacity of 300 acre-feet and serving multiple purposes including flood risk reduction, hydroelectric power generation, and water supply. The dam is regulated by the New York State Department of Environmental Conservation and inspected by the Federal Energy Regulatory Commission, with a low hazard potential and a moderate risk assessment rating.
With a maximum discharge capacity of 14,390 cubic feet per second and a spillway width of 250 feet, Clarks Mills Lower plays a crucial role in managing water flow and ensuring the safety of downstream areas. The dam has not undergone recent condition assessments, but emergency action plans have been prepared and updated in accordance with guidelines. The structure's location in a scenic area with a drainage area of 450 square miles underscores its importance in the local water resource management system, highlighting the need for ongoing monitoring and maintenance to ensure its continued functionality and safety for both the environment and the community.
Year Completed |
1910 |
Dam Length |
300 |
Dam Height |
20 |
River Or Stream |
Battenkill River |
Primary Dam Type |
Concrete |
Surface Area |
46 |
Drainage Area |
450 |
Nid Storage |
300 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Clarks Mills Lower
Schuyler Island Way Schuylerville