Lake Oahe "a memorandum and an executive order asking USACE to expedite its consideration of the company’s application for an easement to start construction." The USACE subsequently "withdrew its call for the environmental study." On 7 February 2017, the USACE approved an easement through Lake Oahe. On 9 February 2017, the Cheyenne River Sioux filed the first legal challenge to the easement, citing an 1851 treaty and interference with the religious practices of the tribe. Lake Oahe Lake Oahe (oh-WAH'-hee) is a large reservoir behind Oahe Dam on the Missouri River; it begins in central South Dakota and continues north into North
Norris Dam State Park dam to the base of River Ridge at the Claiborne-Grainger county line. The lake also spans the lower of the Powell River from the river's mouth to a few miles south of Harrogate, and the lower of Cove Creek. The Norris Dam Reservation, which is managed by the Tennessee Valley Authority, consists of the area immediately around Norris Dam and immediately downstream from the dam on both sides of the Clinch. The western half of the reservation, which is largely undeveloped, is known as the River Bluff Small Wild Area. Norris Dam State Park consists of two sections along the