Patterson Creek No. 4 Dam Reservoir Report
Last Updated: December 5, 2025
Patterson Creek No.
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Summary
4 Dam, also known as Middle Fork, is an Earth type dam located in Grant, West Virginia. Built in 1966 by the USDA NRCS, this dam serves the primary purpose of flood risk reduction along the Middle Fork river. With a height of 69 feet and a storage capacity of 2063 acre-feet, it plays a crucial role in managing water resources in the region.
The dam has a high hazard potential and is regulated by the West Virginia Department of Environmental Protection. While its condition assessment is currently not rated, regular inspections are conducted to ensure its structural integrity. Despite being uncontrolled, the spillway and outlet gates help manage water flow in times of excess discharge, contributing to the overall safety and functionality of the dam.
Given its location in a region prone to flooding, Patterson Creek No. 4 Dam plays a vital role in mitigating risks and protecting the surrounding communities. As a point of interest for water resource and climate enthusiasts, this dam serves as a testament to the ongoing efforts to manage and safeguard our water infrastructure in the face of changing climate patterns.
Year Completed |
1966 |
Dam Length |
795 |
Dam Height |
69 |
River Or Stream |
MIDDLE FORK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
68 |
Drainage Area |
7.73 |
Nid Storage |
2063 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
69 |
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. 4 Dam