The urban core consists of five principal cities: Davenport and Bettendorf in Iowa, and Rock Island, Moline and East Moline in Illinois.
These cities are the center of the Quad Cities Metropolitan Area, which as of 2013 had a population estimate of 383,781 and a CSA (Combined Statistical Area) population of 474,937, making it the 90th largest CSA in the nation.
His business was incorporated as Deere & Company in 1868.
Boat crews needed rest areas to stop before encountering the rapids, places to hire expert pilots such as Phillip Suiter, who was the first licensed pilot on the upper Mississippi River, to guide the boat through the rocky waters, or, when the water was low, places where goods could be removed and transported by wagon on land past the rapids.The major companies, agricultural manufacturers, ceased or scaled back operations in the Quad Cities.Factories which closed included International Harvester in Rock Island and Case IH in Bettendorf. Since the 1990s, the Quad Cities governments, businesses, non-profits and residents have worked hard to redevelop the region.Steamboaters saw the nationwide railroads as a threat to their business.On May 6, 1856, just weeks after completion of the bridge, an angry steamboater crashed the Effie Afton into it.