The Crescent Rail Bridge carries rail lines across the Mississippi River between Davenport, Iowa and Rock Island, Illinois. The Mississippi River, derived from the old Ojibwe word misi-ziibi meaning great river (gichi-ziibi big river at its headwaters), is the second-longest river in the United States; the longest is the Missouri River, which flows into the Mississippi. ... Davenport is a city in the American state of Iowa that borders the Mississippi River. ... Rock Island is a city located in Rock Island County, Illinois. ... A swing bridge is a bridge that has as its primary structural support a vertical locating pin and support ring at or near to its center, about which it can then pivot horizontally as shown in the animated illustration below. ... Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version (pdf, 1. ... The Mississippi River, derived from the old Ojibwe word misi-ziibi meaning great river (gichi-ziibi big river at its headwaters), is the second-longest river in the United States; the longest is the Missouri River, which flows into the Mississippi. ... Davenport is a city in the American state of Iowa that borders the Mississippi River. ... Rock Island is a city located in Rock Island County, Illinois. ...