Harmon Creek No. 3 Dam Reservoir Report

Last Updated: December 6, 2025

Harmon Creek No.


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Summary

3 Dam, also known as Mechling Run, is a crucial structure located in Colliers, West Virginia, designed by the USDA NRCS to address flood risk reduction. Completed in 1970, this earth-type dam stands at a height of 77 feet, with a hydraulic height of 74 feet and a length of 281 feet. With a storage capacity of 192 acre-feet and serving the purpose of flood risk reduction, this dam plays a vital role in protecting the surrounding area from potential water-related disasters.

Managed by the local government and regulated by the West Virginia Department of Environmental Protection, Harmon Creek No. 3 Dam has a high hazard potential but is currently assessed to be in satisfactory condition. Despite its age, the dam continues to meet inspection and regulatory standards, ensuring its effectiveness in flood risk mitigation. With a moderate risk assessment rating of 3, the dam's emergency action plan and risk management measures are continuously reviewed and updated to meet guidelines and ensure public safety.

Overall, Harmon Creek No. 3 Dam serves as a critical infrastructure in the region, providing flood risk reduction measures and protection to the community. With its strategic design, regular inspections, and adherence to regulatory standards, this dam remains a key asset in water resource management and climate resilience efforts in Brooke County, West Virginia.

Year Completed

1970

Dam Length

281

Dam Height

77

River Or Stream

MECHLING RUN

Primary Dam Type

Earth

Surface Area

2

Hydraulic Height

74

Drainage Area

0.57

Nid Storage

192

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Rock, Soil

Nid Height

77
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.