Oahe Dam

The Oahe Dam is a large dam along the Missouri River, just north of Pierre, South Dakota in the United States. It creates Lake Oahe, the fourth largest artificial reservoir in the United States, which stretches 231 miles (372 km) up the course of the Missouri to Bismarck, North Dakota. The dam's powerplant 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. The project provides flood control, electric power, irrigation, and navigation benefits, estimated by the Corps of Engineers at $150,000,000 per year.

History

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 earth main dam reached its full height in October, 1959. It was officially dedicated by President John F. Kennedy on August 17, 1962, the year in which it began generating power. The original project cost was $340,000,000.

North Dakota

North Dakota (pronunciation: ⁱ/ˌnɔːrθ dəˈkoʊtə/; locally [ˌno̞ɹθ dəˈko̞ɾə]) is the 39th state of the United States, having been admitted to the union on November 2, 1889.

It is located in the Upper Midwestern region of the United States, bordered by the Canadian provinces of Saskatchewan and Manitoba to the north, the states of Minnesota to the east, South Dakota to the south, and Montana to the west. The state capital is Bismarck, and the largest city is Fargo. North Dakota is the 19th most extensive but the 4th least populous and the 4th least densely populated of the 50 United States.

North Dakota has weathered the Great Recession of the early 21st century with a boom in natural resources, particularly a boom in oil extraction from the Bakken formation, which lies beneath the northwestern part of the state. The development has driven strong job and population growth, and low unemployment.

Geography

North Dakota is located in the U.S. region known as the Great Plains. The state shares the Red River of the North with Minnesota on the east; South Dakota is to the south, Montana is to the west, and the Canadian provinces of Saskatchewan and Manitoba are north. North Dakota is situated near the middle of North America with a stone marker in Rugby, North Dakota marking the "Geographic Center of the North American Continent". With an area of 70,762 square miles (183,273 km²), North Dakota is the 19th largest state.

South Dakota

South Dakota (ⁱ/ˌsaʊθ dəˈkoʊtə/; locally [ˌsɑʊθ dəˈko̞ɾə]) is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux Native American tribes. South Dakota is the 17th most extensive, but the 5th least populous and the 5th least densely populated of the 50 United States. Once the southern portion of the Dakota Territory, South Dakota became a state on November 2, 1889, simultaneously with North Dakota. Pierre is the state capital and Sioux Falls, with a population of about 165,000, is South Dakota's largest city.

South Dakota is bordered by the states of North Dakota, Minnesota, Iowa, Nebraska, Wyoming, and Montana. The state is bisected by the Missouri River, dividing South Dakota into two geographically and socially distinct halves, known to residents as "East River" and "West River". Eastern South Dakota is home to most of the state's population, and fertile soil in this area is used to grow a variety of crops. West of the Missouri, ranching is the predominant agricultural activity, and the economy is more dependent on tourism and defense spending. The Black Hills, a group of low pine-covered mountains sacred to the Sioux, are located in the southwest part of the state. Mount Rushmore, a major tourist destination, is located there. South Dakota experiences a temperate continental climate, with four distinct seasons and precipitation ranging from moderate in the east to semi-arid in the west. The ecology of the state features species typical of a North American grassland biome.

Lake

A lake is an area of variable size filled with water, localized in a basin, that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean (except for sea lochs in Scotland and Ireland), and therefore are distinct from lagoons, and are also larger and deeper than ponds, though there are no official or scientific definitions. Lakes can be contrasted with rivers or streams, which are usually flowing. However most lakes are fed and drained by rivers and streams.

Natural lakes are generally found in mountainous areas, rift zones, and areas with ongoing glaciation. Other lakes are found in endorheic basins or along the courses of mature rivers. In some parts of the world there are many lakes because of chaotic drainage patterns left over from the last Ice Age. All lakes are temporary over geologic time scales, as they will slowly fill in with sediments or spill out of the basin containing them.

Many lakes are artificial and are constructed for industrial or agricultural use, for hydro-electric power generation or domestic water supply, or for aesthetic or recreational purposes.

Jason Mitchell

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