L Hance Wetland Reserve Dam Reservoir Report
Nearby: Gouverneur Hailsboro Mill #3 Dam
Last Updated: December 18, 2025
The L Hance Wetland Reserve Dam, located in Somerville, New York, serves as a vital resource for fish and wildlife, specifically designed as a Fish and Wildlife Pond.
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Summary
Completed in 2000, this Earth-type dam stands at a height of 10 feet and has a storage capacity of 59 acre-feet. The dam is regulated by the NYS DEC and is inspected regularly to ensure its structural integrity and safety.
With a low hazard potential and a moderate risk assessment rating, the L Hance Wetland Reserve Dam plays a crucial role in managing water resources in the area. Situated along the Malterna Creek, the dam helps control water flow, with a maximum discharge capacity of 443 cubic feet per second. The surrounding wetlands benefit from the dam's presence, providing a habitat for various species and contributing to the overall health of the ecosystem.
Enthusiasts interested in water resource management and climate resilience will find the L Hance Wetland Reserve Dam to be a fascinating example of how infrastructure can support both wildlife conservation and flood control efforts. As a privately owned structure, the dam demonstrates the importance of collaboration between private landowners and regulatory agencies in ensuring the sustainability of water resources for future generations.
Year Completed |
2000 |
Dam Height |
10 |
River Or Stream |
MALTERNA CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
2.4 |
Nid Storage |
59 |
Hazard Potential |
Low |
Nid Height |
10 |
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.
L Hance Wetland Reserve Dam
Oswegatchie River