Lallier Dam Reservoir Report
Last Updated: December 8, 2025
Lallier Dam, also known as Lallier Lake, is a private dam located in Brookfield, New York, along the TR-Beaver Creek.
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Summary
Built in 1960, this earth dam stands at a height of 20 feet and stretches 380 feet in length, with a maximum storage capacity of 93 acre-feet. The primary purpose of Lallier Dam is for recreation, offering a serene spot for water resource and climate enthusiasts to enjoy various outdoor activities.
Managed by the NYS DEC, Lallier Dam is regulated, permitted, inspected, and enforced by the state, ensuring its safety and compliance with regulations. With a low hazard potential and a moderate risk assessment rating, the dam has not been rated for its condition but has not posed significant concerns. The spillway of the dam is uncontrolled with a width of 60 feet, and it has a maximum discharge capacity of 1000 cubic feet per second.
Despite its peaceful surroundings and recreational opportunities, Lallier Dam has not been assigned a Dam Safety Action Classification and lacks detailed risk management measures. Water resource and climate enthusiasts can appreciate the moderate risk level associated with the dam and explore the beautiful Oneida County landscape surrounding it, while being mindful of its regulatory oversight and safety precautions.
Year Completed |
1960 |
Dam Length |
380 |
Dam Height |
20 |
River Or Stream |
TR-BEAVER CREEK |
Primary Dam Type |
Earth |
Surface Area |
14 |
Drainage Area |
1.02 |
Nid Storage |
93 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Steele Cr At Ilion Ny
|
30cfs |
Chenango River At Sherburne Ny
|
286cfs |
West Canada Creek At Kast Bridge Ny
|
1740cfs |
Oneida Creek At Oneida Ny
|
126cfs |
Mohawk River Below Delta Dam Near Rome Ny
|
143cfs |
Mohawk River Near Little Falls Ny
|
2430cfs |
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.
Lallier Dam