Parishville Reservoir Report
Nearby: Allens Falls Five Falls
Last Updated: December 17, 2025
Parishville is a privately owned hydroelectric dam located in West Stockholm, New York, along the West Branch St.
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Summary
Regis River. Constructed in 1925, this gravity dam stands at 19 feet high and has a length of 102.5 feet. With a storage capacity of 289 acre-feet and a drainage area of 177 square miles, Parishville serves multiple purposes including fire protection, stock, small fish pond, and hydroelectric power generation.
Managed by the Federal Energy Regulatory Commission, Parishville has a low hazard potential and a very high risk assessment rating. The dam features a controlled spillway with a width of 10 feet and outlet gates including a slide and two tainter gates. Despite its age, Parishville has not undergone recent condition assessments, but emergency action plans are in place to ensure public safety in the event of a dam failure. Overall, Parishville remains a vital structure for water resource management and renewable energy production in the St. Lawrence County area.
Year Completed |
1925 |
Dam Length |
102.5 |
Dam Height |
19 |
River Or Stream |
West Branch St. Regis River |
Primary Dam Type |
Gravity |
Surface Area |
70 |
Drainage Area |
177 |
Nid Storage |
289 |
Outlet Gates |
Slide (sluice gate) - 1, Tainter (radial) - 2 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
19 |
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.
Parishville