Winkler Lake Dam Lower Reservoir Report

Last Updated: December 6, 2025

Winkler Lake Dam Lower, also known as Flat Rock Lakes Dam, is a privately owned structure located in Hendersonville, North Carolina.


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Summary

This earth dam serves primarily for recreational purposes, with a hydraulic height of 27 feet and a structural height of 31 feet. The dam has a storage capacity of 400 acre-feet, providing a surface area of 4 acres for outdoor activities.

Despite its low hazard potential and satisfactory condition assessment as of 2013, Winkler Lake Dam Lower is regulated and inspected by the North Carolina Dam Safety Program. The dam is situated on UT to Mud Creek (C), contributing to the drainage of the area while offering a tranquil setting for visitors. With a distance of 2 miles from Hendersonville, the dam provides a safe and enjoyable recreational environment for water resource and climate enthusiasts.

As an essential part of the local water infrastructure, Winkler Lake Dam Lower plays a crucial role in managing water resources in the region. The dam does not have a spillway or outlet gates, highlighting its simple yet effective design for recreational use. With regular inspections and a history of meeting regulatory guidelines, this dam exemplifies a commitment to maintaining safety standards while providing a valuable recreational space for the community.

Dam Length

350

River Or Stream

UT to Mud Creek (C)

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

27

Nid Storage

400

Structural Height

31

Hazard Potential

Low

Nid Height

31
       
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.