Lake Florence Dam Reservoir Report
Nearby: Deer River Flow Dam Twin Ponds Dam
Last Updated: December 16, 2025
Lake Florence Dam, located in Franklin, New York, was completed in 1901 and serves as a crucial water resource for the area.
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Summary
This private-owned earth dam stands at 18 feet in height, with a length of 225 feet, and has a storage capacity of 154 acre-feet. The dam is situated on the Deer River and is regulated by the New York State Department of Environmental Conservation (NYS DEC), with state permitting, inspection, and enforcement in place.
With a spillway type of "Uncontrolled" and a spillway width of 26 feet, Lake Florence Dam has a low hazard potential and a moderate risk assessment rating. Although the condition assessment is not rated, the dam has not been modified in recent years and was last inspected in 1996. Despite its age, the dam continues to provide vital water storage and management for the surrounding area, with a surface area of 20 acres and a drainage area of 10 square miles.
For water resource and climate enthusiasts, Lake Florence Dam represents a historic piece of infrastructure that plays a significant role in the local ecosystem and water supply. With its moderate risk assessment and low hazard potential, the dam stands as a testament to effective state regulation and management practices. As efforts continue to ensure the safety and sustainability of the dam, Lake Florence remains a focal point for water conservation and management in the region.
Year Completed |
1901 |
Dam Length |
225 |
Dam Height |
18 |
River Or Stream |
DEER RIVER |
Primary Dam Type |
Earth |
Surface Area |
20 |
Drainage Area |
10 |
Nid Storage |
154 |
Hazard Potential |
Low |
Nid Height |
18 |
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.
Lake Florence Dam