Lake Oahe 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 Dakota in the United States. The lake has an area of and a maximum depth of . By volume, it is the fourth-largest reservoir in the US. Lake Oahe has a length of approximately and has a shoreline of . 51 recreation areas are located along Lake Oahe, and 1.5 million people visit the reservoir every year. The lake is named for the 1874 Oahe Indian Mission. Lake Oahe begins just north of
Whipple Dam State Park Whipple Dam State Park Whipple Dam State Park is a Pennsylvania state park on in Jackson Township, Huntingdon County, Pennsylvania in the United States. Whipple Lake is a man-made lake on that was originally built during the height of the lumber era that swept through Pennsylvania in the late 19th and early 20th century to supply power for a sawmill. Whipple Dam State Park is south of State College, just east of Pennsylvania Route 26. The land on which Whipple Dam State Park is located was purchased from the Iroquois Confederation in 1754 by the Proprietary Government of Pennsylvania. Eventually