High Rock Reservoir Report

Last Updated: December 5, 2025

High Rock Dam, located in North Carolina on the Yadkin River, is a gravity-type structure built in 1927 with a primary purpose of hydroelectric power generation.


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Summary

Designed by the Aluminum Company of America, the dam stands at a height of 65 feet and has a hydraulic height of 71.6 feet. With a storage capacity of 287,000 acre-feet and a surface area of 15,180 acres, High Rock Dam plays a crucial role in water supply, recreation, and hydroelectric power generation.

The dam boasts a controlled spillway with a width of 450 feet and vertical lift gates for water release. Despite its high hazard potential and very high risk assessment, the condition assessment is not available, highlighting the need for regular inspections and risk management measures. Owned privately, High Rock Dam is regulated by the Federal Energy Regulatory Commission and serves as a vital water resource in the region, supporting various ecological and human needs while contributing to the local economy and energy sector.

With its impressive structure and significant capacity, High Rock Dam stands as a key player in the water resource management of the Yadkin River. Its historic significance, coupled with its multiple functions and risk assessment challenges, make it a focal point for water resource and climate enthusiasts interested in sustainable water infrastructure and energy production.

Year Completed

1927

Dam Length

936

Dam Height

65

River Or Stream

Yadkin River

Primary Dam Type

Gravity

Surface Area

15180

Hydraulic Height

71.6

Drainage Area

3980

Nid Storage

287000

Structural Height

96

Outlet Gates

Vertical Lift - 12

Hazard Potential

High

Foundations

Rock

Nid Height

96
       
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.