Galena River (Illinois) Galena River (Illinois) The Galena River, also known as the Fevre or Fever River, is a river which flows through the Midwestern United States. The river rises in Lafayette County, Wisconsin, south of Benton and southwest of Shullsburg. It enters Illinois in Jo Daviess County to flow through the city of Galena before it joins the upper Mississippi River a few miles south and west. The river is part of the Driftless Area of Illinois and Wisconsin. This region was ice-free during the Wisconsin glaciation and underwent hundreds of thousands of years of glacial-free erosion. The river also occupies a
Course of the Colorado River colorful and intricately sculpted rock formations. The Escalante River, a desert stream which runs through the sinuous slot canyons of Grand Staircase-Escalante National Monument, joins about two-thirds of the way down Lake Powell. The San Juan River, which carries runoff from the southern slopes of the San Juan Mountains and the Four Corners region in Colorado and New Mexico, joins several miles further downstream; it forms an arm of the lake nearly long. Although the San Juan contributes only about one-tenth of the Colorado River flow, it is extremely muddy, contributing as much as 40 percent of the total sediment