Hornell Reservoir #2 Dam Reservoir Report
Last Updated: December 6, 2025
Hornell Reservoir #2 Dam, located in Hornell, New York, serves as a crucial water supply infrastructure for the local community.
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Summary
Constructed in 1918, this Earth-type dam stands at a height of 30 feet and has a length of 275 feet. With a storage capacity of 230 acre-feet and a normal storage of 91 acre-feet, the dam plays a vital role in managing water resources in the region.
Situated on Seely Creek, the dam has a drainage area of 3.64 square miles and a surface area of 35 acres. It features an uncontrolled spillway with a width of 35 feet, ensuring the safe discharge of excess water during periods of heavy rainfall. Despite being classified as having a low hazard potential, the dam is subject to moderate risk (3) according to the latest assessment.
Managed by the local government and regulated by the New York State Department of Environmental Conservation (NYS DEC), Hornell Reservoir #2 Dam is a testament to the importance of maintaining and monitoring water infrastructure to ensure the safety and sustainability of water resources in the face of climate change and evolving environmental conditions.
Year Completed |
1918 |
Dam Length |
275 |
Dam Height |
30 |
River Or Stream |
SEELY CREEK |
Primary Dam Type |
Earth |
Surface Area |
35 |
Drainage Area |
3.64 |
Nid Storage |
230 |
Hazard Potential |
Low |
Nid Height |
30 |
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.
Hornell Reservoir #2 Dam