High Falls - Dike No. 1 Reservoir Report
Nearby: High Falls - Dike No. 2 High Falls
Last Updated: December 19, 2025
High Falls - Dike No.
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Summary
1 is a private-owned structure located in Croghan, New York, along the Beaver River. This earth dam, completed in 1925, serves a primary purpose of hydroelectric power generation. It stands at a height of 10 feet and spans 150 feet in length, with a storage capacity of 1058 acre-feet and a surface area of 145 acres.
Managed by the Federal Energy Regulatory Commission, High Falls - Dike No. 1 has a low hazard potential and is inspected every three years. While its condition assessment is not available, it has not undergone recent modifications. The surrounding area has a high risk rating of 2, prompting the need for effective risk management measures to ensure the safety and integrity of the dam and its associated structures.
Water resource and climate enthusiasts will find High Falls - Dike No. 1 an intriguing site for its historical significance in hydroelectric power generation and its role in regulating water flow along the Beaver River. With its unique multi-arch design and rock foundation, this dam represents a blend of engineering excellence and environmental stewardship in the picturesque setting of Lewis County, New York.
Year Completed |
1925 |
Dam Length |
150 |
Dam Height |
10 |
River Or Stream |
Beaver River |
Primary Dam Type |
Earth |
Surface Area |
145 |
Drainage Area |
267 |
Nid Storage |
1058 |
Hazard Potential |
Low |
Foundations |
Rock |
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.
High Falls - Dike No. 1