Niobrara

Niobrara n??brr? [key], river, c.430 mi (690 km) long, rising in the High Plains, E Wyo., and flowing E across N Nebraska to the Missouri River on Nebraska's northeast border. The Mirage Flats irrigation project uses water impounded by Box Butte Dam (completed 1946). A scenic 76-mi (122-km) portion of the river comprises Niobrara National Scenic River (see National Parks and Monuments, table).

The Columbia Electronic Encyclopedia, 6th ed. Copyright 2012, Columbia University Press. All rights reserved.

See more Encyclopedia articles on: Compounds and Elements