They typically perch within 50 feet of the riverbank in tall cottonwood trees. In South Dakota, many bald eagles spend their winters below the Missouri River dams where they are able to catch fish and prey on waterfowl attracted to the open water. The eagle roost area in the park is a designated National Natural Landmark. Randall Creek is one of the South Dakota state parks that offers the opportunity for visitors to see the majestic bald eagle. The US Army Corps of Engineers began building the dam in 1946 and started generating electricity in 1954. Spend hours peacefully watching the water flow, observing the animals and birds that frequent the area, and enjoying he breathtaking beauty of the surrounding shoreline. Randall Creek Recreation Area is located on the banks of the Missouri River, downstream from Fort Randall Dam.