Beachville Dam Reservoir Report
Nearby: Pinewood Lake Dam Stanley Osborn Dam
Last Updated: December 6, 2025
Beachville Dam, also known as Mcsps Wildlife Marsh, is a privately owned structure located in South Dansville, New York, on the Mill Creek.
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Summary
Built in 1966, this earth dam stands at 8 feet high and spans 475 feet in length, with a storage capacity of 52 acre-feet. The dam serves a primary purpose other than flood control, and has a low hazard potential with a moderate risk assessment rating.
Managed by the New York State Department of Environmental Conservation, Beachville Dam is regulated, permitted, inspected, and enforced by state authorities. The dam features an uncontrolled spillway with a width of 200 feet, and has a maximum discharge capacity of 50 cubic feet per second. Although its condition assessment is currently not rated, the dam is considered to meet safety guidelines and poses a moderate risk level.
For water resource and climate enthusiasts, Beachville Dam offers an intriguing glimpse into the intersection of human infrastructure and natural ecosystems. With its location in a wetland area and the potential impact on local waterways, the dam presents a unique case study for understanding the complexities of managing water resources in a changing climate. As efforts continue to monitor and assess the dam's safety and environmental impact, it remains a focal point for discussions on sustainable water management practices and adaptation strategies in the face of evolving climate challenges.
Year Completed |
1966 |
Dam Length |
475 |
Dam Height |
8 |
River Or Stream |
MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
28 |
Drainage Area |
0.89 |
Nid Storage |
52 |
Hazard Potential |
Low |
Nid Height |
8 |
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.
Beachville Dam