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
Percha Dam State Park Percha Dam State Park Percha Dam State Park is a state park of New Mexico, United States, located south of Truth or Consequences, New Mexico on the Rio Grande. The park itself encompasses approximately . The dam is less than downstream of the much larger Caballo Dam, and therefore Percha Dam's reservoir is essentially a wide, slow moving section of river. The dam's purpose is to raise the elevation of the Rio Grande slightly to allow irrigation of the chile pepper crop downstream. The park is popular for fishing, rafting, kayaking, and bird watching, and it is especially popular during