The James E. "Buck" Karnes Bridge, also known as the Alcoa Highway Bridge, sometimes abbreviated as the Buck Karnes Bridge, is a vehicle bridge that crosses the Tennessee River in Knoxville, Tennessee, United States. The bridge carries US 129/SR 115 between Knoxville and Maryville. The current bridge structure was completed in 1990, replacing an older structure that existed from 1930 to 1990 at the same location. The 1,169-foot (356 m) bridge is one of three vehicle bridges connecting Downtown Knoxville with South Knoxville, the other two being the James C. Ford Memorial Bridge,, and the Henley Bridge,.