The Missouri River is the longest river in North America. Rising in the Rocky Mountains of western Montana, the Missouri flows east and south for 2,341 miles (3,767 km) before entering the Mississippi River north of St. Louis, Missouri. The river drains a sparsely populated, semi-arid watershed of more than 500,000 square miles (1,300,000 km2), which includes parts of ten U.S. states and two Canadian provinces. Although nominally considered a tributary of the Mississippi, the Missouri River above the confluence is much longer and carries a comparable volume of water. When combined with the lower Mississippi River, it forms the world's fourth longest river system.
Yankton County is a county in the U.S. state of South Dakota. As of the 2010 United States Census, the population was 22,438. Its county seat is Yankton. Yankton County comprises the Yankton, SD Micropolitan Statistical Area.
Yankton is a city in and the county seat of Yankton County, South Dakota, United States.
This is the timeline of the Lewis and Clark Expedition through the American West, 1803-1806.
Charles Floyd was an American explorer, a non-commissioned officer in the U.S. Army, and the quartermaster of the Lewis and Clark Expedition. A native of Kentucky, he was a son of Robert Clark Floyd, a nephew of James John Floyd, a cousin of Virginia governor John Floyd, and possibly a relative of William Clark. He was one of the first men to join the expedition, and the only member of the Corps of Discovery to die during the expedition.
Fort Randall Dam is a 2.03 mi (3 km) long earthen dam which spans the Missouri River and impounds Lake Francis Case, the 11th largest reservoir in the U.S. The dam joins Gregory and Charles Mix County, South Dakota a distance of 880 river miles (1,416 km) upstream of St. Louis, Missouri, where the river joins the Mississippi River. The dam and Hydroelectric power plant were constructed by and are currently operated by the U.S. Army Corps of Engineers.
The Oahe Dam is a large earthen dam on the Missouri River, just north of Pierre, South Dakota, United States. The dam creates Lake Oahe, the fourth-largest man-made reservoir in the United States. The reservoir stretches 231 miles (372 km) up the course of the Missouri to Bismarck, North Dakota. The dam's power plant provides electricity for much of the north-central United States. It is named for the Oahe Indian Mission established among the Lakota Sioux in 1874.
Lake Oahe 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 370,000 acres (1,500 km2) and a maximum depth of 205 ft (62 m). By volume, it is the fourth-largest reservoir in the US. Lake Oahe has a length of approximately 231 mi (372 km) and has a shoreline of 2,250 mi (3,620 km). 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.
The Floyd River is a tributary of the Missouri River, 112 miles (180 km) long, in northwestern Iowa in the United States. It enters the Missouri at Sioux City, and is named for Charles Floyd, a member of the Lewis and Clark Expedition.
Gavins Point Dam is a 1.9 mi (3 km) long embankment rolled-earth and chalk-fill dam which spans the Missouri River and impounds Lewis and Clark Lake. The dam joins Cedar County, Nebraska with Yankton County, South Dakota a distance of 811.1 river miles (1,305 km) upstream of St. Louis, Missouri, where the river joins the Mississippi River. The dam and hydroelectric power plant were constructed as the Gavins Point Project from 1952 to 1957 by the United States Army Corps of Engineers as part of the Pick-Sloan Plan. The dam is located approximately 4 miles (6.4 km) west or upstream of Yankton, South Dakota.
Lewis and Clark Lake is a 31,400 acre (130 km²) reservoir located on the border of the U.S. states of Nebraska and South Dakota on the Missouri River. The lake is approximately 25 miles (40 km) in length with over 90 miles (140 km) of shoreline and a maximum water depth of 45 feet (14 m). The lake is impounded by Gavins Point Dam and is managed by the U.S. Army Corps of Engineers, Omaha District.
The Missouri National Recreational River is a National Recreational River located on the border between Nebraska and South Dakota. The designation was first applied in 1978 to a 59-mile section of the Missouri River between Gavins Point Dam and Ponca State Park. In 1991, an additional 39-mile section between Fort Randall Dam and Niobrara, Nebraska, was added to the designation. These two stretches of the Missouri River are the only parts of the river between Montana and the mouth of the Missouri that remain undammed or unchannelized. The last 20 miles of the Niobrara River and 6 miles of Verdigre Creek were also added in 1991.
Lake Yankton, also called Cottonwood Lake, is an artificial lake that was originally part of the main channel of the Missouri River on the border of the U.S. States of Nebraska and South Dakota, near Yankton, South Dakota. The lake has an approximate surface area of 250 acres (100 ha) and has a maximum depth of 18 feet (5.5 m). The lake is located immediately downstream (east) of Gavins Point Dam and Lewis and Clark Lake, located just north of the current location of the main channel of the Missouri River.
Lewis and Clark Recreation Area is a State Recreation Area in southeastern South Dakota, near Yankton. The Recreation Area is located on the northern shore of the 31,400-acre Lewis and Clark Lake, a large Missouri River Reservoir, impounded by Gavins Point Dam.
Lewis and Clark State Recreation Area (SRA) is an 864-acre State Recreation Area located on the southern shore of Lewis and Clark Lake, in northeastern Nebraska. The recreation area is located in Knox County, approximately 12 miles (19 km) northwest of Crofton. The recreation area is managed by the Nebraska Game and Parks Commission.
Chief White Crane Recreation Area is a state recreation area in southeastern South Dakota, United States. It is located about 5 miles (8.0 km) west of Yankton and located on the shores of the Missouri River and Lake Yankton. The recreation area is located about 1.5 miles (2.4 km) downstream of Gavins Point Dam and Lewis and Clark Lake.
Pierson Ranch Recreation Area is a state recreation area in Yankton County, South Dakota in the United States. The recreation area is 60 acres (24 ha) and lies directly below Gavins Point Dam and Lewis and Clark Lake and is adjacent to Lake Yankton. The area is open for year-round recreation including camping, swimming, fishing, hiking and boating. It is 4 miles (6.4 km) west of Yankton.
Training Dike Recreation Area, also called Training Dike Day-Use Area is a U.S. Army Corps of Engineers public recreation area located immediately downstream of Gavins Point Dam and Lewis and Clark Lake on the north bank of the Missouri River. The area is about 4.5 miles (7.2 km) west of Yankton. The area is located mostly in Cedar County, Nebraska, with a small portion located in Yankton County, South Dakota.
Cottonwood Recreation Area is a public recreation area located in Cedar County, Nebraska, U.S.. It is located about 5 miles (8.0 km) west of Yankton and located on the shores of Lake Yankton. The recreation area is located immediately downstream of Gavins Point Dam and Lewis and Clark Lake. It is named for Cottonwood Island, an original island located in the Missouri River, for the large groves of Cottonwood Trees that dominate the area. The recreation area is owned and managed by the U.S. Army Corps of Engineers.
