Oahe Dam dam upstream is Garrison Dam, near Riverdale, North Dakota, and the next dam downstream is Big Bend Dam, near Fort Thompson, South Dakota. In September and October 1804, the Lewis and Clark Expedition passed through what is now Lake Oahe while exploring the Missouri River. Oahe Dam was authorized by the Flood Control Act of 1944, and construction by the United States Army Corps of Engineers began in 1948. The world’s first rock tunnel boring machine (TBM) was invented in 1952 by James S. Robbins for the Oahe Dam project, which marked the beginning of machines replacing human tunnelers. The
Percha Dam State Park the spring and autumn migration seasons. 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,