Question: What is a tributary of the river near Tazewell, Virginia, and flows southwest for more than 300 mi through the Great Appalachian Valley, that drains a watershed area of 86.5 mi2 between Copper Ridge and Black Oak Ridge ?
Sentence (from "Beaver Creek (Tennessee)"): It flows from northeast to southwest from the Gibbs High School area, through the Halls, Powell, Karns, Solway, and Hardin Valley communities, entering the Clinch downstream from Solway.
Relevant evidence: No