Soft Maple Dike No. 1 Reservoir Report

Last Updated: December 17, 2025

Soft Maple Dike No.


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Summary

1, located in Belfort, Lewis, New York, is a privately owned earth dam built in 1926 primarily for hydroelectric purposes. With a height of 15 feet and a length of 200 feet, this dam has a storage capacity of 2678 acre-feet and serves the Beaver River, covering a surface area of 400 acres and draining a 240-acre watershed. Despite its low hazard potential, the dam is under the jurisdiction of the Federal Energy Regulatory Commission, which also conducts regular inspections.

The dam has a total of 8 associated structures and is part of the New York District of the US Army Corps of Engineers. It is not regulated by the state but is subject to inspections by the Federal Energy Regulatory Commission. The dam has no spillway and its condition assessment is currently not available. However, the risk assessment categorizes it as having a high risk level of 2, indicating the need for robust risk management measures. Overall, Soft Maple Dike No. 1 stands as a historic infrastructure contributing to the local hydroelectric power generation and water resource management efforts in the region.

Year Completed

1926

Dam Length

200

Dam Height

15

River Or Stream

Beaver River

Primary Dam Type

Earth

Surface Area

400

Drainage Area

240

Nid Storage

2678

Hazard Potential

Low

Foundations

Soil

Nid Height

15
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.