High Quality Content by WIKIPEDIA articles! The Dunlap Coke Ovens are the remnants of a coke production facility near Dunlap, in the U.S. state of Tennessee. Built in the early 1900s, the facility consists of five batteries of 268 beehive ovens, which operated under various companies until the early 1920s. The ovens are now listed on the National Register of Historic Places, and are maintained by the Sequatchie Valley Historical Society as part of Dunlap Coke Ovens Park.