Kansas

Course

Beginning at the confluence of the Republican and Smoky Hill rivers, just east of aptly named Junction City (1,040 feet or 320 metres), the Kansas River flows some 148 miles (238 km) generally eastward to join the Missouri River at Kaw Point (718 feet or 219 metres) in Kansas City, Kansas. Dropping 322 feet (98 m) on its journey seaward, the water in the Kansas River falls less than 2 feet per mile (38 cm/km). The Kansas River valley is only 115 miles (185 km) long; the surplus length of the river is due to meandering across the floodplain. The river's course roughly follows the maximum extent of a Pre-Illinoian glaciation, and the river likely began as a path of glacial meltwater drainage.

History

The first map showing the Kansas River is French cartographer Guillaume de L'Isle's "Carte de la Louisiane," which was drawn about 1718. On it, the "Grande Riviere des Cansez" flows into the Missouri River at about the 39th parallel. This map, with virtually no changes except for the translation of French into English, was subsequently published by John Senex, a London cartographer and engraver, in 1721.

From June 26 through 29, 1804, the Lewis and Clark Expedition camped at Kaw Point at the Kansas River's mouth. They praised the scenery in their accounts and noted the area would be a good location for a fort.

In August 1819, Maj. Stephen H. Long steered the first steamer into the Kansas River with his 30-ton boat Western Engineer.

Geology

The Kansas River flows through what is known as the Stable Interior region. Since this region is near the center of the North American Plate, it has not experienced any extensive geologic faulting, folding, or mountain building in recent geologic time. From the confluence at Junction City, the river flows through limestone, shale, mudstone, and occasional sandstone strata that, except for diagenesis, remain largely undisturbed since deposition in shallow Carboniferous and Permian seas. The age of the rock exposed by the river becomes progressively older as the river moves downstream for two main reasons.