NM21-763-036 Sioux City, Iowa, U.S.A. Winter 1995-1996 Featured in this northeast-looking, low-oblique photograph is the Missouri River. Visible to the west in Nebraska are the flat plains of the Missouri River Valley with their predominant agricultural field patterns. Sioux City, situated at the confluence of the Big Sioux, Floyd, and Missouri Rivers, is a shipping, trade, and industrial center for an extensive agricultural and livestock area. Bluffs rising 100 to 200 feet (31 to 62 meters) border Sioux City on the east and northeast. The runways of Sioux City Municipal Airport are visible south of the city.