Afterbay Reservoir At Dam Nr Mcgehees Mill Reservoir Report
Last Updated: December 5, 2025
The Afterbay Reservoir, located at Dam Nr.
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Summary
McGehees Mill in North Carolina, was constructed in 1940 as a part of the Yadkin River Hydroelectric Project. It is a small reservoir that serves as a holding pond for water that is released from the Tillery Reservoir, before being used to generate hydroelectric power. The reservoir has a storage capacity of 2,900 acre-feet and receives water from the river and from snowmelt. The Yadkin River is the primary surface flow provider for the reservoir, while snowpack from the surrounding Blue Ridge Mountains also contributes to the water supply. The reservoir is primarily used for power generation, but it also provides recreational opportunities such as fishing and boating. Agricultural use of the water is limited due to its small size.
Reservoir Details
| Gage Height, Ft 24hr Change | -0.01% |
| Percent of Normal | 99% |
| Minimum |
368.21 ft
2021-04-26 |
| Maximum |
386.33 ft
2017-04-26 |
| Average | 378 ft |
Seasonal Comparison
Gage Height, Ft Levels
Weather Forecast
Nearby Streamflow Levels
Hyco R Bl Abay D Nr Mcgehees Mill
|
1cfs |
Mayo Cr Nr Bethel Hill
|
5cfs |
Hyco River Near Denniston
|
143cfs |
Dan River At Paces
|
1160cfs |
Dan River At South Boston
|
1070cfs |
Hyco Creek Near Leasburg
|
5cfs |
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.
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Afterbay Reservoir At Dam Nr Mcgehees Mill
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