Lake Oahe Pierre, South Dakota and extends nearly as far north as Bismarck, North Dakota. Mobridge, South Dakota is located on the eastern shore of the central portion of the lake. Bridges over Lake Oahe include US Route 212 west of Gettysburg, South Dakota and US Route 12 at Mobridge. The former town of Forest City has been flooded beneath Lake Oahe, about 9 miles west of Gettysburg. Prehistoric archaeological sites have been explored in the area, including Molstad Village near Mobridge. It dates to before the emergence of the Arikara, Hidatsa and Mandan as separate peoples, and has been designated as
Apalachia Dam of Historic Places in 2017. Apalachia Dam is named for the crossroads community of Old Apalachia, located near the dam site in North Carolina, and the community's L&N railroad stop, known simply as Apalachia, which was further downstream on the Tennessee side of the state line. Apalachia Dam is located nearly upstream from the mouth of the Hiwassee River, which flows northwestward through Northern Georgia and Western North Carolina before emptying into Chickamauga Lake in East Tennessee. The dam is situated near the center of a scenic and relatively isolated valley sliced by the river as it winds its way