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
Norris Dam State Park the Tennessee Valley Authority in the early 1930s. The Clinch River flows southwestward for from its source in southwestern Virginia to its mouth along the Tennessee River near Kingston. Norris Dam is located just over upstream from the mouth of the Clinch, near the Anderson-Campbell county line. Cove Creek, which flows down from its source in the Cumberland Mountains roughly to the northwest, empties into the Clinch approximately north of Norris Dam. The Powell River, which also rises in southwestern Virginia, empties into the Clinch approximately upstream from Norris Dam. Norris Lake spans a stretch of the Clinch from the