North Fork (Pa-406) Reservoir Report
Nearby: Lake Lloyd Marsh Creek Dam
Last Updated: December 6, 2025
North Fork (Pa-406) is a vital earth dam located in Harrison Township, Potter County, Pennsylvania.
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Summary
Built in 1960 and standing at a height of 58 feet with a length of 622 feet, this dam serves the primary purpose of flood risk reduction along the White Branch North Fork river. Managed by the local government and regulated by the Pennsylvania Department of Environmental Protection, North Fork is a crucial infrastructure ensuring the safety and protection of the surrounding community.
With a storage capacity of 749 acre-feet and a drainage area of 3.4 square miles, North Fork plays a significant role in mitigating flood risks in the region. Despite being assessed in fair condition with a high hazard potential, the dam is regularly inspected, with the last inspection conducted in November 2020. The USDA NRCS designed this dam, showcasing the collaboration between government agencies and the commitment to safeguarding water resources and communities from the impacts of extreme weather events and climate change.
As a part of the flood risk reduction strategy, North Fork (Pa-406) stands as a testament to effective water resource management and infrastructure planning. With its critical role in protecting the area from potential inundation, this dam serves as a model for sustainable and resilient water management practices, highlighting the importance of proactive measures in adapting to a changing climate and safeguarding our communities from natural disasters.
Year Completed |
1960 |
Dam Length |
622 |
Dam Height |
58 |
River Or Stream |
WHITE BRANCH NORTH FORK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
3.4 |
Nid Storage |
749 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
58 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cowanesque River At Westfield
|
20cfs |
Cowanesque River At Elkland
|
104cfs |
Genesee River At Wellsville Ny
|
136cfs |
Tuscarora Creek Above South Addison Ny
|
13cfs |
Straight Run
|
1cfs |
Canisteo River At West Cameron Ny
|
100cfs |
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.
North Fork (Pa-406)