Brockville Waste Weir Dam Reservoir Report

Last Updated: December 6, 2025

The Brockville Waste Weir Dam, located in Orleans County, New York, is a concrete structure completed in 1918 for the primary purpose of navigation along the TR-West Branch of Sandy Creek.


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Summary

The dam stands at 16 feet in height and spans 52 feet in length, with a storage capacity of 11,488 acre-feet. With a significant hazard potential and moderate risk assessment, this dam is regulated by the New York State Department of Environmental Conservation (NYS DEC) and undergoes regular inspections to ensure its structural integrity.

Despite being classified as "Not Rated" in terms of condition assessment, the Brockville Waste Weir Dam has a spillway width of 27 feet and a maximum discharge capacity of 475 cubic feet per second. The dam's location in the heart of Brockville, along with its historical significance in the region, make it a focal point for water resource and climate enthusiasts. As a key component of the local water management system, the dam plays a crucial role in maintaining optimal water levels and protecting against potential flooding events in the area.

With its rich history dating back over a century and its ongoing role in water resource management, the Brockville Waste Weir Dam serves as a testament to the importance of sustainable infrastructure development in safeguarding our natural environment. As efforts continue to improve dam safety and resilience in the face of changing climate conditions, this iconic structure remains a symbol of the intersection between human ingenuity and environmental stewardship.

Year Completed

1918

Dam Length

52

Dam Height

16

River Or Stream

TR-West Br. Sandy Creek

Primary Dam Type

Concrete

Surface Area

890

Drainage Area

1.6

Nid Storage

11488

Hazard Potential

Significant

Nid Height

16
       
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.