High Rock Lake is a reservoir located on the Yadkin River in central North Carolina in the counties of Davidson and Rowan. Built in 1926-27 by the Tallassee Power Company, a wholly owned subsidiary of the Aluminum Company of America (Alcoa), the lake is the northernmost of a series of four hydroelectric projects designed at the time to support the company’s Badin Works, a large aluminum smelting operation located 16 miles downstream in the community of Badin. After the permanent closing of the Badin Works in 2007, Alcoa continued to operate its Yadkin hydroelectric facilities until selling them to Cube Hydro Carolinas in 2016. 

The Yadkin River is one of the longest rivers in the US state of North Carolina, flowing 215 miles (346 km). It rises in the northwestern portion of the state near the Blue Ridge Parkway's Thunder Hill Overlook. Several parts of the river are impounded by dams for water, power, and flood control. The river becomes the Pee Dee River at the confluence of the Uwharrie River south of the community of Badin and east of the town of Albemarle. The river then flows into South Carolina near Cheraw, which is at the Fall Line. The entirety of the Yadkin River and the Great Pee Dee River is part of the Yadkin-Pee Dee River Basin.