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
Parker Dam State Park Dam State Park. The following state parks are within of Parker Dam State Park: Parker Dam State Park Parker Dam State Park is a Pennsylvania state park in Huston Township, Clearfield County, Pennsylvania in the United States. The park is surrounded by Moshannon State Forest. Parker Dam State park is north of Clearfield on Pennsylvania Route 153 just off exit 111 of Interstate 80. The park was constructed during the Great Depression by the Civilian Conservation Corps. They built many of the facilities that are in use today at Parker Dam State Park. The park takes its name from William