The Afterbay Reservoir, located at Dam Nr. 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.