Patterson Creek No. 1 Dam Reservoir Report
Last Updated: December 5, 2025
Patterson Creek No.
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Summary
1 Dam, located in Lahmansville, West Virginia, was completed in 1966 by the USDA NRCS and serves as a critical infrastructure for flood risk reduction along Patterson Creek. The dam stands at a height of 52 feet with a hydraulic height of 45 feet, holding a maximum storage capacity of 933 acre-feet and a normal storage capacity of 75 acre-feet. With a surface area of 14 acres, the dam plays a crucial role in protecting the surrounding area from potential flooding events.
Managed by the local government and regulated by the West Virginia Department of Environmental Protection, the Patterson Creek No. 1 Dam is classified as having a high hazard potential. Despite not being rated for its condition assessment, the dam undergoes inspections every two years to ensure its structural integrity. In case of emergencies, an emergency action plan was last revised in May 2014 to outline necessary protocols and contacts. The risk assessment for the dam is categorized as moderate, emphasizing the importance of ongoing risk management measures to safeguard the community and environment.
As a key component of the flood risk reduction system in Grant County, West Virginia, the Patterson Creek No. 1 Dam serves as a vital structure for water resource management and climate resilience in the region. With its earth dam type and stone core, the dam has been designed to withstand potential flood events and protect downstream areas from excessive water flow. It stands as a testament to the collaborative efforts between federal and local agencies in safeguarding communities against the impacts of extreme weather events and ensuring the sustainable management of water resources in the area.
Year Completed |
1966 |
Dam Length |
776 |
Dam Height |
52 |
River Or Stream |
PATTERSON CREEK |
Primary Dam Type |
Earth |
Surface Area |
14 |
Hydraulic Height |
45 |
Nid Storage |
933 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
52 |
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. 1 Dam
Jake Hill Road Bridge To Shreve Store