Patterson Creek No. 41 Dam Reservoir Report
Last Updated: December 5, 2025
Patterson Creek No.
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Summary
41 Dam, also known as North Fork Dam, is a vital water resource structure located in Grant, West Virginia. Built in 1969 by the USDA NRCS, this earth dam stands at a height of 88 feet and serves the primary purpose of flood risk reduction along the North Fork river. With a storage capacity of 7680 acre-feet and a drainage area of 29.53 square miles, the dam plays a crucial role in managing water flow and protecting the surrounding communities from potential flooding events.
Managed by the local government and regulated by the West Virginia Department of Environmental Protection, the dam is classified as having a high hazard potential due to its size and location. Despite not being rated for its condition, regular inspections are conducted to ensure its structural integrity. In the event of an emergency, measures are in place, although the Emergency Action Plan (EAP) may need updating. With a moderate risk assessment score, the dam continues to be a key component in the region's water resource and climate management efforts.
In conclusion, Patterson Creek No. 41 Dam stands as a critical infrastructure for flood risk reduction in West Virginia. With its strategic location, high hazard potential, and moderate risk assessment, the dam serves as a crucial element in safeguarding the local communities and natural habitats along the North Fork river. As water resource and climate enthusiasts, understanding the significance of this structure highlights the importance of sustainable water management practices and the need for ongoing monitoring and maintenance to ensure its long-term effectiveness.
Year Completed |
1969 |
Dam Length |
1120 |
Dam Height |
88 |
River Or Stream |
NORTH FORK |
Primary Dam Type |
Earth |
Surface Area |
26 |
Hydraulic Height |
75 |
Drainage Area |
29.53 |
Nid Storage |
7680 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
88 |
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.
Patterson Creek No. 41 Dam