Information: - The Centennial Bridge , or Rock Island Centennial Bridge , connects Rock Island , Illinois and Davenport , Iowa . The bridge is 3,850 feet ( 1,173 m ) long and stands 170 feet ( 52 m ) above water level . Construction of the bridge began in 1938 and it opened on July 12 , 1940 as a toll bridge . The bridge cost $ 1.75 million to construct . It was designed by Ash - Howard - Needles & Tammen and built by the American Bridge Company , McCarthy Improvement Company , and Priester Construction Company . The original toll was $ 0.10 , and eventually rose to $ 0.50 for automobiles ( and as high as $ 2.00 for semi-trucks ) . Early in the bridge 's history , pedestrians paid a $ .05 walker 's fee ; this fee ended in 1960 . The tolls for motorists ended on May 2 , 2003 . On that day , a ceremony was held to commemorate the occasion and to honor the toll workers and all of those who had worked for the bridge during the toll era . The bridge had been under the management of Sue Nelson before going toll - free . The Dohrn Transfer Company of Rock Island , the first official toll - paying vehicle to cross the bridge in 1949 , was the last official patron of the bridge . On September 4 , 1988 , 128 sodium lamps were installed on the arches , making the bridge a scenic sight at night . River Action Inc. raised funds for the lighting project through their initiative '' Lights ! River ! Action ! '' . On July 13 , 2005 , the city of Rock Island transferred ownership of the bridge to the Illinois Department of Transportation after the completion of a project costing over $ 11 million in structural upgrades to the bridge . It was originally going to be named the '' Galbraith Bridge '' , after Rock Island 's mayor at the time , Robert Galbraith . He suggested it be named the Centennial Bridge , in commemoration of the city of Rock Island 's centennial . The five arches of the bridge are a symbol often used to represent the Quad Cities . The two largest arches symbolize Rock Island and Davenport while the smaller ones represent the... - Rock Island is a city in and the county seat of Rock Island County, Illinois, United States. The original Rock Island, from which the city name is derived, is the largest island on the Mississippi River. It is now called Arsenal Island. The population was 39,018 at the 2010 census. Located on the Mississippi River, it is one of the Quad Cities, along with neighboring Moline, East Moline, and the Iowa cities of Davenport and Bettendorf. The Quad Cities has a population of about 380,000. The city is home to Rock Island Arsenal, the largest government-owned weapons manufacturing arsenal in the US, which employs 6,000 people. - The Rock Island Arsenal comprises , located on Arsenal Island, originally known as Rock Island, on the Mississippi River between the cities of Davenport, Iowa, and Rock Island, Illinois. It lies within the state of Illinois. It is home of First Army headquarters. The island was originally established as a government site in 1816, with the building of Fort Armstrong. It is now the largest government-owned weapons manufacturing arsenal in the United States. It has manufactured military equipment and ordnance since the 1880s. In 19191920 one hundred of the Anglo-American or Liberty Mark VIII tanks were manufactured, although too late for World War I. It is designated as a National Historic Landmark. - The Black Hawk War was a brief 1832 conflict between the United States and Native Americans led by Black Hawk, a Sauk leader. The war erupted soon after Black Hawk and a group of Sauks, Meskwakis, and Kickapoos, known as the "British Band", crossed the Mississippi River, into the US state of Illinois, from Iowa Indian Territory in April 1832. Black Hawk's motives were ambiguous, but he was apparently hoping to avoid bloodshed while resettling on tribal land that had been ceded to the United States in the disputed 1804 Treaty of St. Louis. - The Mississippi River is the chief river of the largest drainage system on the North American continent. Flowing entirely in the United States (although its drainage basin reaches into Canada), it rises in northern Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 31 U.S. states and 2 Canadian provinces between the Rocky and Appalachian Mountains. The Mississippi ranks as the fourth longest and fifteenth largest river in the world by discharge. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana. - Illinois is a state in the midwestern region of the United States, achieving statehood in 1818. It is the 5th most populous state and 25th largest state in terms of land area, and is often noted as a microcosm of the entire country. The word "Illinois" comes from the Algonquin word for "tribe of superior men". With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal, timber, and petroleum in the south, Illinois has a diverse economic base and is a major transportation hub. The Port of Chicago connects the state to other global ports from the Great Lakes, via the Saint Lawrence Seaway, to the Atlantic Ocean, as well as the Great Lakes to the Mississippi River, via the Illinois River. For decades, O'Hare International Airport has been ranked as one of the world's busiest airports. Illinois has long had a reputation as a bellwether both in social and cultural terms and politics. - Davenport is the county seat of Scott County in Iowa and is the largest of the Quad Cities, a metropolitan area with a population estimate of 382,630 and a CSA population of 474,226, making it the 90th largest CSA in the nation. Davenport was founded on May 14, 1836 by Antoine Le Claire and was named for his friend, George Davenport, a colonel during the Black Hawk War stationed at nearby Fort Armstrong. According to the 2010 census, the city had a population of 99,685 (making it Iowa's third-largest city). However, the city is currently appealing this figure, arguing that the Census Bureau missed a section of residents that would place the total population over 100,000, and indeed, even the Census Bureau's own "estimate" for Davenport's 2011 population is 100,802. What is the relationship between 'rock island centennial bridge' and 'mississippi river'?
A:
crosses