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101-431: The race was named in honor of the home state in which it was run, the state of Illinois . The inaugural running of the race took place at Hawthorne in 1923 and was won by In Memoriam , the 3-year-old champion with Zev that year. The race was then run at Sportsman's Park from 1924 through 1931. It moved to Aurora Downs racetrack in 1932 and was run there until 1938. In 1939 the race went on hiatus until through 1962. Then

202-643: A Jacksonville, Illinois businessman, who invited her to Illinois, where he had been working to build an asylum for the insane. With the lobbying expertise of Dix, plans for the Jacksonville State Hospital (now known as the Jacksonville Developmental Center ) were signed into law on March 1, 1847. During the American Civil War , Illinois ranked fourth in soldiers who served (more than 250,000) in

303-601: A particle accelerator , which was the world's largest for over 40 years. With eleven plants currently operating, Illinois leads all states in the amount of electricity generated from nuclear power. In 1961, Illinois became the first state in the nation to adopt the recommendation of the American Law Institute and pass a comprehensive criminal code revision that repealed the law against sodomy . The code also abrogated common law crimes and established an age of consent of 18. The state's fourth constitution

404-593: A sanctuary state . In the 2018 election , Rauner was replaced by J. B. Pritzker , returning the state government to a Democratic trifecta . In January 2020 the state legalized marijuana . On March 9, 2020, Pritzker issued a disaster proclamation due to the COVID-19 pandemic . He ended the state of emergency in May 2023. During the early part of the Paleozoic Era , the area that would one day become Illinois

505-407: A succession crisis , Brigham Young led most Latter Day Saints out of Illinois in a mass exodus to present-day Utah ; after close to six years of rapid development, Nauvoo quickly declined afterward. After it was established in 1833, Chicago gained prominence as a Great Lakes port, and then as an Illinois and Michigan Canal port after 1848, and as a rail hub soon afterward. By 1857, Chicago

606-684: A "Dual Classic Winner" by winning the Kentucky Derby and the Preakness Stakes. War Emblem helped elevate the prestige of the Illinois Derby by displaying that a race winner could go on to even bigger glory. In 2004 Pollard's Vision also helped increase the stature of the race when he won it. Pollard's Vision was a colt who was blind in his right eye, he was named in honor of Seabiscuit 's jockey Red Pollard , who also lost sight in his right eye. In 2006 Sweetnorthernsaint ,

707-529: A 50-acre (20 ha) plaza larger than 35 football fields, and a woodhenge of sacred cedar, all in a planned design expressing the culture's cosmology. Monks Mound , the center of the site, is the largest Pre-Columbian structure north of the Valley of Mexico . It is 100 ft (30 m) high, 951 ft (290 m) long, 836 ft (255 m) wide, and covers 13.8 acres (5.6 ha). It contains about 814,000 cu yd (622,000 m ) of earth. It

808-610: A boom in 1937, and by 1939, Illinois ranked fourth in U.S. oil production. Illinois manufactured 6.1 percent of total United States military armaments produced during World War II , ranking seventh among the 48 states. Chicago became an ocean port with the opening of the Saint Lawrence Seaway in 1959. The seaway and the Illinois Waterway connected Chicago to both the Mississippi River and

909-474: A chain of events culminating in Blagojevich's impeachment , trial, and subsequent criminal conviction and imprisonment, making Blagojevich the second consecutive Illinois governor to be convicted on federal corruption charges. Blagojevich's replacement Pat Quinn was defeated by Republican Bruce Rauner in the 2014 election . Disagreements between the governor and legislature over budgetary policy led to

1010-556: A climate that varies widely throughout the year. Because of its nearly 400-mile distance between its northernmost and southernmost extremes, as well as its mid-continental situation, most of Illinois has a humid continental climate ( Köppen climate classification Dfa ), with hot, humid summers and cold winters. The southern part of the state, from about Carbondale southward, has a humid subtropical climate (Koppen Cfa ), with more moderate winters. Average yearly precipitation for Illinois varies from just over 48 in (1,219 mm) at

1111-796: A fort at the site of present-day Peoria , and in 1682, a fort atop Starved Rock in today's Starved Rock State Park. French Empire Canadiens came south to settle particularly along the Mississippi River, and Illinois was part of first New France , and then of La Louisiane until 1763, when it passed to the British with their defeat of France in the Seven Years' War . The small French settlements continued, although many French migrated west to Ste. Genevieve and St. Louis, Missouri , to evade British rule. A few British soldiers were posted in Illinois, but few British or American settlers moved there, as

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1212-682: A law to prohibit all African Americans, including freedmen , from settling in the state. The winter of 1830–1831 is called the "Winter of the Deep Snow"; a sudden, deep snowfall blanketed the state, making travel impossible for the rest of the winter, and many travelers perished. Several severe winters followed, including the "Winter of the Sudden Freeze". On December 20, 1836, a fast-moving cold front passed through, freezing puddles in minutes and killing many travelers who could not reach shelter. The adverse weather resulted in crop failures in

1313-778: A leading cultural, economic, and population center; its metropolitan area , informally referred to as Chicagoland , holds about 65% of the state's 12.8 million residents. Two World Heritage Sites are in Illinois, the ancient Cahokia Mounds , and part of the Wright architecture site. Major centers of learning include the University of Chicago , University of Illinois , and Northwestern University . A wide variety of protected areas seek to conserve Illinois' natural and cultural resources. Three U.S. presidents have been elected while residents of Illinois: Abraham Lincoln , Ulysses S. Grant , and Barack Obama ; additionally, Ronald Reagan

1414-734: A north–south line at 87° 31′ 30″ west longitude in Lake Michigan at the north, to the Wabash River in the south above Post Vincennes . The Wabash River continues as the eastern/southeastern border with Indiana until the Wabash enters the Ohio River . This marks the beginning of Illinois's southern border with Kentucky , which runs along the northern shoreline of the Ohio River. Most of the western border with Missouri and Iowa

1515-589: A state in 1818, the Ordinance no longer applied, and about 900 slaves were held in the state. As the southern part of the state, later known as "Egypt" or "Little Egypt", was largely settled by migrants from the South, the section was hostile to free blacks. Edward Coles , the second Governor of Illinois who was born in Virginia, participated in a campaign to block extending existing slavery in Illinois after winning

1616-716: A string of high-profile exonerations, Ryan commuted all death sentences in the state. The 2002 election brought Democrat Rod Blagojevich to the governor's mansion. It also brought future president Barack Obama into a committee leadership position in the Illinois Senate, where he drafted the Health Care Justice Act , a forerunner of the Affordable Care Act . Obama's election to the presidency in Blagojevich's second term set off

1717-481: A transportation hub for the nation. By 1900, the growth of industrial jobs in the northern cities and coal mining in the central and southern areas attracted immigrants from Eastern and Southern Europe . Illinois became one of America's most industrialized states and remains a major manufacturing center. The Great Migration from the South established a large Black community, particularly in Chicago , which became

1818-645: A weather station not subjected to the same quality control as official records. Illinois averages approximately 51 days of thunderstorm activity a year, which ranks somewhat above average in the number of thunderstorm days for the United States. Illinois is vulnerable to tornadoes, with an average of 35 occurring annually, which puts much of the state at around five tornadoes per 10,000 sq mi (30,000 km ) annually. While tornadoes are no more powerful in Illinois than other states, some of Tornado Alley 's deadliest tornadoes on record have occurred in

1919-538: A wide variety of ethnic groups. The city of Rockford , Illinois's third-largest city and center of the state's fourth largest metropolitan area, sits along Interstates 39 and 90 some 75 mi (121 km) northwest of Chicago. The Quad Cities region, located along the Mississippi River in northern Illinois, had a population of 381,342 in 2011. The midsection of Illinois is the second major division, called Central Illinois . Historically prairie , it

2020-576: Is ireniwaki . The name Illiniwek has also been said to mean 'tribe of superior men', which is a false etymology . The name Illinois derives from the Miami-Illinois verb irenwe·wa 'he speaks the regular way'. This was taken into the Ojibwe language , perhaps in the Ottawa dialect , and modified into ilinwe· (pluralized as ilinwe·k ). The French borrowed these forms, spelling

2121-536: Is a state in the Midwestern region of the United States . It borders the state of Wisconsin to its north, Iowa to its northwest, Missouri to its southwest, Kentucky to its south, Indiana to its east, and has a water border with Michigan to the northeast in Lake Michigan . Of the fifty U.S. states, Illinois has the fifth-largest gross domestic product (GDP) , the sixth-largest population , and

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2222-487: Is defined as 10 miles north of the southernmost extremity of Lake Michigan. However, the Illinois delegate, Nathaniel Pope , wanted more, and lobbied to have the boundary moved further north. The final bill passed by Congress included an amendment to shift the border to 42° 30' north, which is approximately 51 mi (82 km) north of the Indiana northern border. This shift added 8,500 sq mi (22,000 km ) to

2323-663: Is developing a long-term plan to reduce combined sewer overflows to the Illinois River, as required by the U.S. Environmental Protection Agency and the Illinois Environmental Protection Agency . During dry weather, sewage flows safely through the city's sewers to the Greater Peoria Sanitation District wastewater treatment plant . However, about 28 times a year, melting snow or rainwater can overwhelm

2424-715: Is now mainly agricultural and known as the Heart of Illinois. It is characterized by small towns and medium–small cities. The western section (west of the Illinois River) was originally part of the Military Tract of 1812 and forms the conspicuous western bulge of the state. Agriculture, particularly corn and soybeans , as well as educational institutions and manufacturing centers, figure prominently in Central Illinois. Cities include Peoria ; Springfield ,

2525-564: Is separated from the rest of the state by the Mississippi River. This region has a somewhat warmer winter climate, different variety of crops (including some cotton farming in the past), more rugged topography (due to the area remaining unglaciated during the Illinoian Stage , unlike most of the rest of the state), as well as small-scale oil deposits and coal mining. The Illinois suburbs of St. Louis , such as East St. Louis , are located in this region, and collectively, they are known as

2626-478: Is the Mississippi River ; Kaskaskia is an exclave of Illinois, lying west of the Mississippi and reachable only from Missouri. The state's northern border with Wisconsin is fixed at 42° 30′ north latitude. The northeastern border of Illinois lies in Lake Michigan , within which Illinois shares a water boundary with the state of Michigan , as well as Wisconsin and Indiana. Though Illinois lies entirely in

2727-514: Is wide, deep, and still, for 65 leagues." In 1680, René-Robert Cavelier, Sieur de La Salle built the first fort in Illinois, Ft. St. Louis, at Starved Rock to facilitate the fur trade and defend the Illinois against the Iroquois . Later the fort was relocated to the present site of Creve Coeur , near Peoria. The French retained a presence in the area, with small trading posts. Prior to

2828-524: The /we/ ending as -ois , a transliteration of that sound in the French of that time. The current spelling form, Illinois , began to appear in the early 1670s, when French colonists had settled in the western area. The Illinois's name for themselves, as attested in all three of the French missionary-period dictionaries of Illinois, was Inoka , of unknown meaning and unrelated to the other terms. American Indians of successive cultures lived along

2929-424: The 1822 Illinois gubernatorial election . In 1824, state residents voted against making slavery legal by a vote of 6640 against to 4972 for. Still, most residents opposed allowing free blacks as permanent residents. Some settlers brought in slaves seasonally or as house servants. The Illinois Constitution of 1848 was written with a provision for exclusionary laws to be passed. In 1853, John A. Logan helped pass

3030-440: The 25th-most land area . Its capital city is Springfield in the center of the state, and the state's largest city is Chicago in the northeast. Present-day Illinois was inhabited by Indigenous cultures for thousands of years. The French were the first Europeans to arrive, settling near the Mississippi and Illinois River in the 17th century Illinois Country , as part of their sprawling colony of New France . A century later,

3131-610: The Atlantic Ocean . In 1960, Ray Kroc opened the first McDonald's franchise in Des Plaines , which was demolished in 1984. In 1985 a replica was built on the same site to recreate how the original one looked. Though this replica was demolished in 2017, due to repeated flooding of the building. Illinois had a prominent role in the emergence of the nuclear age . In 1942, as part of the Manhattan Project ,

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3232-805: The Eocene Epoch . During the Pleistocene Epoch , vast ice sheets covered much of Illinois, with only the Driftless Area remaining exposed. These glaciers carved the basin of Lake Michigan and left behind traces of ancient glacial lakes and moraines . Illinois is located in the Midwest region of the United States and is one of the eight states in the Great Lakes region of North America (which also includes Ontario , Canada). Illinois's eastern border with Indiana consists of

3333-549: The Illinois Native Americans , a name that was spelled in many different ways in the early records. American scholars previously thought the name Illinois meant 'man' or 'men' in the Miami-Illinois language , with the original iliniwek transformed via French into Illinois. This etymology is not supported by the Illinois language, as the word for "man" is ireniwa , and plural of "man"

3434-490: The Illinois Budget Impasse , a 793-day period stretching from 2015 to 2018 in which the state had no budget and struggled to pay its bills. On August 28, 2017, Rauner signed a bill into law that prohibited state and local police from arresting anyone solely due to their immigration status or due to federal detainers. Some fellow Republicans criticized Rauner for his action, claiming the bill made Illinois

3535-683: The Interior Plains , it does have some minor variation in its elevation. In extreme northwestern Illinois, the Driftless Area , a region of unglaciated and therefore higher and more rugged topography, occupies a small part of the state. Southern Illinois includes the hilly areas around the Shawnee National Forest . Charles Mound , located in the Driftless region, has the state's highest natural elevation above sea level at 1,235 ft (376 m). Other highlands include

3636-678: The Latter Day Saints had founded a utopian city called Nauvoo , formerly called Commerce. Located in Hancock County along the Mississippi River , Nauvoo flourished and, by 1844, briefly surpassed Chicago for the position of the state's largest city. But in that same year, the Latter Day Saint movement founder, Joseph Smith , was killed in the Carthage Jail , about 30 miles away from Nauvoo. Following

3737-707: The Metro-East . The other somewhat significant concentration of population in Southern Illinois is the Carbondale-Marion-Herrin, Illinois Combined Statistical Area centered on Carbondale and Marion , a two-county area that is home to 123,272 residents. A portion of southeastern Illinois is part of the extended Evansville, Indiana , Metro Area, locally referred to as the Tri-State with Indiana and Kentucky. Seven Illinois counties are in

3838-487: The Midwest region . Chicago, the third-most populous city in the United States , is the center of the Chicago metropolitan area or Chicagoland, as this area is nicknamed. Although the Chicago metropolitan area comprises only 9% of the land area of the state, it contains 65% of the state's residents, with 21.4% of Illinois' population living in the city of Chicago itself as of 2020. The losses of population anticipated from

3939-404: The Mississippi River at approximately 273 miles (439 km) in length. Located in the U.S. state of Illinois , the river has a drainage basin of 28,756.6 square miles (74,479 km ). The Illinois River begins with the confluence of the Des Plaines and Kankakee rivers in the Chicago metropolitan area , and it generally flows to the southwest across Illinois, until it empties into

4040-653: The Shawnee Hills in the south, and there is varying topography along its rivers; the Illinois River bisects the state northeast to southwest. The floodplain on the Mississippi River from Alton to the Kaskaskia River is known as the American Bottom . Illinois has three major geographical divisions. Northern Illinois is dominated by Chicago metropolitan area , or Chicagoland, which is

4141-647: The Spoon River coming from Fulton County , and across from Browning , it is joined by the Sangamon River , which passes through the state capital, Springfield, Illinois . The La Moine River flows into it approximately five miles (8 km) southwest of Beardstown , which is south of Peoria and Pekin and northwest of Lincoln and Springfield. Near the confluence of the Illinois with the La Moine River , it turns south, flowing roughly parallel to

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4242-476: The Union Army , a figure surpassed by only New York, Pennsylvania , and Ohio . Beginning with President Abraham Lincoln 's first call for troops and continuing throughout the war, Illinois mustered 150 infantry regiments, which were numbered from the 7th to the 156th regiments. Seventeen cavalry regiments were also gathered, as well as two light artillery regiments. The town of Cairo , at the southern tip of

4343-423: The University of Chicago conducted the first sustained nuclear chain reaction . In 1957, Argonne National Laboratory , near Chicago , activated the first experimental nuclear power generating system in the United States. By 1960, the first privately financed nuclear plant in the United States, Dresden 1 , was dedicated near Morris . In 1967, Fermilab , a national nuclear research facility near Batavia , opened

4444-627: The "Great Bend", flowing southwest across western Illinois, past Lacon , Henry and downtown Peoria , the chief city on the river. South of Peoria, the Illinois River goes by East Peoria and Creve Coeur and then Pekin in Tazewell County . It is then joined by the Mackinaw River , and then passes through the Chautauqua National Wildlife Refuge . Across from Havana , the Illinois is joined by

4545-534: The 2020 census results do not arise from the Chicago metro area; rather the declines are from the Downstate counties. As of the 2020 census, the state's geographic mean center of population is located at 41° 18′ 43″N 88° 22 23″W in Grundy County , about six miles northwest of Coal City . Illinois River The Illinois River ( Miami-Illinois : Inoka Siipiiwi ) is a principal tributary of

4646-733: The Crown made it part of the territory reserved for Indians west of the Appalachians, and then part of the British Province of Quebec . In 1778, George Rogers Clark claimed Illinois County for Virginia . In a compromise, Virginia (and other states that made various claims) ceded the area to the new United States in the 1780s and it became part of the Northwest Territory , administered by the federal government and later organized as states. The Illinois-Wabash Company

4747-725: The Fox ( Meskwaki ), Iowa , Kickapoo , Mascouten , Piankeshaw , Shawnee , Wea , and Winnebago ( Ho-Chunk ) came into the area from the east and north around the Great Lakes. French explorers Jacques Marquette and Louis Jolliet explored the Illinois River in 1673. Marquette soon after founded a mission at the Grand Village of the Illinois in Illinois Country . In 1680, French explorers under René-Robert Cavelier, Sieur de La Salle and Henri de Tonti constructed

4848-535: The Fox, Vermilion, Macoupin, Mackinaw, Spoon, Sangamon, and La Moine. This river flows west across northern Illinois, passing Morris and Ottawa , where it is joined by the Mazon River and Fox River respectively. At LaSalle , the Illinois River is joined by the Vermilion River , and then it flows west past Peru and Spring Valley . In southeastern Bureau County it turns south at an area known as

4949-407: The Great Lakes, and the invention of the self-scouring steel plow by Illinoisan John Deere turned the state's rich prairie into some of the world's most productive and valuable farmland, attracting immigrant farmers from Germany and Sweden . In the mid-19th century, the Illinois and Michigan Canal and a sprawling railroad network facilitated trade, commerce, and settlement, making the state

5050-403: The Illinois Derby winner that year, helped the stature of the race after recording the highest beyer speed figure of the year in the race and was installed as the morning line favorite in the Kentucky Derby. Sweetnorthernsait went on to become the Preakness Stakes runner-up to Bernardini in the race where Barbaro was fatally injured. In 1997, at Sportsman's Park, Wild Rush set the record for

5151-442: The Mississippi across western Illinois. Macoupin Creek joins the Illinois on the border between Greene and Jersey counties, approximately 15 miles (24 km) upstream from the confluence with the Mississippi River . For the last 20 miles (32 km) of its course, the Illinois is separated from the Mississippi River by only about five miles (8 km), by a peninsula of land that makes up Calhoun County . The Illinois joins

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5252-452: The Mississippi near Grafton , approximately 25 miles (40 km) northwest of downtown St. Louis and about 20 miles (32 km) upstream from the confluence of the Missouri River and the Mississippi. South of Hennepin , the Illinois River follows the ancient channel of the Mississippi River. The Illinoian Stage , about 300,000 to 132,000 years ago, blocked the Mississippi near Rock Island , diverting it into its present channel. After

5353-457: The Mississippi near Grafton, Illinois . Its drainage basin extends into southeastern Wisconsin , northwestern Indiana , and a very small area of southwestern Michigan in addition to central Illinois. Along its shores are several river ports, including Peoria, Illinois . Historic and recreation areas on the river include Starved Rock , and the internationally important wetlands of the Emiquon Complex and Dixon Waterfowl Refuge . The river

5454-415: The Starved Rock Visitor Center, which offers an excellent interpretation of the entire system. The waterway is heavily used by barges transporting bulk goods such as grain and oil. It is used in the summer and early fall by tourists in pleasure boats cruising the Great Loop . The Illinois River is an important part of the Great Loop, the circumnavigation of Eastern North America by water. The City of Peoria

5555-496: The United States except for the Columbia River . The Illinois River was once a major source of mussels for the shell button industry. Overfishing , habitat loss from heavy siltation , and water pollution have eliminated most commercial fishing except for a small mussel harvest to provide shells to seed pearl oysters overseas. It is commercially fished downstream of the Rt. 89 bridge at Spring Valley . However, an infestation of invasive Asian Carp has crowded out many game fish in

5656-491: The area. In addition to these three, largely latitudinally defined divisions, all of the region outside the Chicago metropolitan area is often called " downstate " Illinois. This term is flexible, but is generally meant to mean everything outside the influence of the Chicago area. Thus, some cities in Northern Illinois, such as DeKalb , which is west of Chicago, and Rockford —which is actually north of Chicago—are sometimes incorrectly considered to be 'downstate'. Illinois has

5757-479: The banks of the Illinois across from Starved Rock at the Grand Village of the Illinois , near present-day Utica. The Illinois Confederation were the primary inhabitants of the valley. Marquette wrote of the river, "We have seen nothing like this river that we enter, as regards its fertility of soil, its prairies and woods; its cattle, elk, deer, wildcats, bustards, swans, ducks, parroquets, and even beaver. There are many small lakes and rivers. That on which we sailed

5858-474: The central Illinois River valley, one third of all adults died as a result of violent injuries." The next major power in the region was the Illinois Confederation or Illini, a political alliance. Around the time of European contact in 1673, the Illinois confederation had an estimated population of over 10,000 people. As the Illini declined during the Beaver Wars era, members of the Algonquian -speaking Potawatomi , Miami , Sauk , and other tribes including

5959-409: The city of Chicago and its suburbs, and the adjoining exurban area into which the metropolis is expanding. As defined by the federal government, the Chicago metro area includes several counties in Illinois, Indiana , and Wisconsin , and has a population of over 9.8 million. Chicago itself is a cosmopolitan city, densely populated, industrialized, the transportation hub of the nation, and settled by

6060-410: The construction of the Chicago Sanitary and Ship Canal in the late 19th century, Chicago's sewage was pushed down the river rather than into Lake Michigan. As the canal declined by the early 1900s, it was eventually replaced by the Illinois Waterway in 1933, which is still in use today. The Peoria Riverfront Museum contains a gallery, "Illinois River Encounter," that offers an interpretation of

6161-419: The construction of the Illinois & Michigan Canal , completed in 1845, Peoria was the only large settlement on the River. The river's trade flowed downstream to be dominated by St. Louis . After the I&M Canal was built, a string of cities, such as LaSalle, Peru, and Ottawa grew along the river, extending Chicago 's influence into the Mississippi Valley. During the nineteenth and early twentieth centuries,

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6262-446: The development of the American labor movement . From Sunday, October 8, 1871, until Tuesday, October 10, 1871, the Great Chicago Fire burned in downtown Chicago, destroying four sq mi (10 km ). At the turn of the 20th century, Illinois had a population of nearly 5 million. Many people from other parts of the country were attracted to the state by employment caused by the expanding industrial base. Whites were 98% of

6363-548: The end of Indian resistance to white settlement in the Chicago region. The Indians had been forced to leave their homes and move to Iowa in 1831; when they attempted to return, they were attacked and eventually defeated by U.S. militia . The survivors were forced back to Iowa. By 1832, when the last Indian lands in Illinois were ceded to the United States, the indigenous population of the state had been reduced by infectious diseases, warfare, and forced westward removal to only one village with fewer than 300 inhabitants. By 1839,

6464-423: The fastest time in the Illinois Derby at 1:47.51. It had been a Grade II race with an offering of a purse of $ 500,000, however, it was reduced to a Grade III race for 2010 by the American Graded Stakes Committee . Since that time. For 2012, the purse has been reinstated to $ 500,000, but reduced to $ 400,000 in 2015. Illinois Illinois ( / ˌ ɪ l ɪ ˈ n ɔɪ / IL -in- OY )

6565-465: The flow of the Chicago River, the pollution and sewage of the city of Chicago flowed down into the Illinois River. The Illinois and Michigan Canal has since been replaced by the Illinois Waterway , including the Chicago Sanitary and Ship Canal . River traffic and flood control is managed by eight locks and dams operated by the U.S. Army Corps of Engineers . As of 2011, all locks and dams on this waterway are closed to visitors for security reasons, except

6666-402: The glacier melted, the Illinois River flowed into the ancient channel. The Hennepin Canal roughly follows the ancient channel of the Mississippi upstream of Rock Island. The modern channel of the Illinois River was shaped in a matter of days by the Kankakee Torrent . During the melting of the Wisconsin Glacier about 10,000 years ago, a lake formed in present-day Indiana, comparable to one of

6767-528: The modern Great Lakes . The lake formed behind the terminal moraine of a substage of that glacier. Melting ice to the north eventually raised the level of the lake so that it overflowed the moraine. The dam burst , and the entire volume of the lake was released in a very short time, perhaps a few days. Because of the manner of its formation, the Illinois River runs through a deep canyon with many rock formations. It has an "underutilized channel", one far larger than would be needed to contain any conceivable flow of

6868-450: The modern river. The Illinois River valley has long been an important transportation route for civilizations. The portages between the Des Plaines and Chicago Rivers and the Kankakee and St. Joseph rivers allowed Native Americans, Europeans, and later Americans access between the Great Lakes and the Mississippi basin . The first European presence in the area was the Jesuit mission founded in 1675 by Father Jacques Marquette on

6969-415: The nation's railroad hub since the 1860s, and its O'Hare International Airport has been among the world's busiest airports for decades. Illinois has long been considered a microcosm of the United States and a bellwether in American culture, exemplified by the phrase Will it play in Peoria? . "Illinois" is the modern spelling for the early French Catholic missionaries and explorers' name for

7070-407: The north and center, and natural resources such as coal, timber, and petroleum in the south. Owing to its central location and favorable geography, the state is a major transportation hub : the Port of Chicago has access to the Atlantic Ocean through the Great Lakes and Saint Lawrence Seaway and to the Gulf of Mexico from the Mississippi River via the Illinois Waterway . Chicago has been

7171-410: The northern part of the state. The southern part of the state shipped food north, and this may have contributed to its name, " Little Egypt ", after the Biblical story of Joseph in Egypt supplying grain to his brothers. In 1832, the Black Hawk War was fought in Illinois and present-day Wisconsin between the United States and the Sauk , Fox (Meskwaki) , and Kickapoo Indian tribes. It represents

7272-399: The population of Illinois was 12,812,508 in the 2020 United States census , moving from the fifth-largest state to the sixth-largest state (losing out to Pennsylvania). Illinois' population slightly declined in 2020 from the 2010 United States census by just over 18,000 residents and the overall population was quite higher than recent census estimates. Illinois is the most populous state in

7373-403: The race was revived at Sportsman's Park Racetrack again in 1963 where it remained through its 2002 running. The race was not run 1939-1962 and 1970–1971. The race was first graded in 1973 when the grading system started as a grade three stakes race and in 1997 was elevated to a grade two stakes race. The inaugural running of the race in 1923 was run at 1 + 1 ⁄ 4 miles. Before 2000,

7474-605: The race was run between the Kentucky Derby and the Preakness Stakes thus competing with the second leg of the Triple Crown for good runners. Beginning in 2001, the Illinois Derby was moved to four weeks before the Kentucky Derby and instantly became a major Triple Crown prep race. The 2002 Illinois Derby won by War Emblem was the last Derby run at Sportsman's Park Racetrack. War Emblem went on to become

7575-411: The residents of the river towns were deeply involved in harvesting the river's fish, waterfowl, mussels , and ice . They were economically and culturally dependent on the river, building up industries such as tourism related to duck hunting and sport fishing, commercial fishing, musseling for the button factories, and ice cutting for early attempts at refrigeration for domestic and commercial use. With

7676-433: The revolutionary Illinois campaign prefigured American involvement in the region. Following U.S. independence in 1783 , which made the Mississippi River the national boundary, American settlers began arriving from Kentucky via the Ohio River. Illinois was soon part of the United States' oldest territory, the Northwest Territory , and in 1818 it achieved statehood . The Erie Canal brought increased commercial activity in

7777-610: The river as link between Lake Michigan and the Mississippi was extended into the era of modern industrial shipping. The Illinois now forms the basis for the Illinois Waterway , extending the river's capabilities for navigation and commercial shipping. The Illinois River is formed by the confluence of the Kankakee River and the Des Plaines River in eastern Grundy County , approximately 10 miles (16 km) southwest of Joliet . Its other major tributaries include

7878-404: The river through an aquarium tank, and displays of the river's geology, ecology, social history, engineering, and commercial use. The Starved Rock Lock and Dam Visitor Center features exhibits on the Illinois River with a viewing area of the working lock in a site frequented by bald eagles. From 1905 to 1915, more freshwater fish were harvested from the Illinois River than from any other river in

7979-561: The river. The Illinois River is still an important sports fishing waterway with a good sauger fishery. The Illinois forms part of a modern waterway that connects the Great Lakes at Chicago to the Mississippi River. The waterway was originally established by the building of the Illinois and Michigan Canal that connected the Illinois River to the Chicago River . When the Sanitary District of Chicago later reversed

8080-596: The second-most populous urban area in Illinois with over 700,000 residents. Other major urban areas include the Peoria metropolitan area , Rockford metropolitan area , Champaign–Urbana metropolitan area (home to the University of Illinois ), Springfield metropolitan area , the Illinois portion of the Quad Cities area, and the Bloomington–Normal metropolitan area . The United States Census Bureau found that

8181-420: The sewers, causing untreated sewage to overflow into the Illinois River. Peoria was required to examine the sewer overflows and prepare a long-term control plan to meet Clean Water Act requirements and protect the Illinois River. The city had to submit its plan by December 2008 to U.S. EPA and Illinois EPA. The issue was still under discussion as recently as 2016. The John Hartford song "Long Hot Summer Day"

8282-423: The southern tip of Lake Michigan. Such a boundary would have left Illinois with no shoreline on Lake Michigan at all. However, as Indiana had successfully been granted a 10 mi (16 km) northern extension of its boundary to provide it with a usable lakefront, the original bill for Illinois statehood, submitted to Congress on January 23, 1818, stipulated a northern border at the same latitude as Indiana's, which

8383-402: The southern tip to around 35 in (889 mm) in the northern portion of the state. Normal annual snowfall exceeds 38 in (965 mm) in the Chicago area, while the southern portion of the state normally receives less than 14 in (356 mm). The all-time high temperature was 117 °F (47 °C), recorded on July 14, 1954, at East St. Louis , and the all-time low temperature

8484-592: The state at the confluence of the Mississippi and Ohio Rivers, served as a strategically important supply base and training center for the Union army. For several months, both General Grant and Admiral Foote had headquarters in Cairo. During the Civil War, and more so afterwards, Chicago's population skyrocketed, which increased its prominence. The Pullman Strike and Haymarket Riot , in particular, greatly influenced

8585-407: The state capital; Quincy ; Decatur ; Bloomington-Normal ; and Champaign - Urbana . The third division is Southern Illinois , comprising the area south of U.S. Route 50 , including Little Egypt , near the juncture of the Mississippi River and Ohio River . Southern Illinois is the site of the ancient city of Cahokia , as well as the site of the first state capital at Kaskaskia , which today

8686-588: The state's population. Bolstered by continued immigration from southern and eastern Europe , and by the African-American Great Migration from the South, Illinois grew and emerged as one of the most important states in the union. By the end of the century, the population had reached 12.4 million. The Century of Progress World's fair was held at Chicago in 1933. Oil strikes in Marion County and Crawford County led to

8787-482: The state, including the lead mining region near Galena . More importantly, it added nearly 50 miles of Lake Michigan shoreline and the Chicago River. Pope and others envisioned a canal that would connect the Chicago and Illinois rivers and thus connect the Great Lakes to the Mississippi. In 1818, Illinois became the 21st U.S. state. The capital remained at Kaskaskia, headquartered in a small building rented by

8888-422: The state. In 1819, Vandalia became the capital, and over the next 18 years, three separate buildings were built to serve successively as the capitol building. In 1837, the state legislators representing Sangamon County , under the leadership of state representative Abraham Lincoln , succeeded in having the capital moved to Springfield , where a fifth capitol building was constructed. A sixth capitol building

8989-448: The state. The Tri-State Tornado of 1925 killed 695 people in three states; 613 of the victims died in Illinois. Chicago is the largest city in the state and the third-most populous city in the United States, with a population of 2,746,388 in 2020. Furthermore, over 7 million residents of the Chicago metropolitan area reside in Illinois. The U.S. Census Bureau currently lists seven other cities with populations of over 100,000 within

9090-479: The state. This includes the Chicago satellite towns of Aurora , Joliet , Naperville , and Elgin , as well as the cities of Rockford , the most populous city in the state outside of the Chicago area; Springfield , the state's capital; and Peoria . The most populated city in the state south of Springfield is Belleville , with 42,000 residents. It is located in the Metro East region of Greater St. Louis ,

9191-504: The waterways of the Illinois area for thousands of years before the arrival of Europeans. The Koster Site has been excavated and demonstrates 7,000 years of continuous habitation. Cahokia , the largest regional chiefdom and Urban Center of the Pre-Columbian Mississippian culture , was located near present-day Collinsville, Illinois . They built an urban complex of more than 100 platform and burial mounds ,

9292-455: Was Illinois's largest city. With the tremendous growth of mines and factories in the state in the 19th century, Illinois was the ground for the formation of labor unions in the United States . In 1847, after lobbying by Dorothea L. Dix , Illinois became one of the first states to establish a system of state-supported treatment of mental illness and disabilities, replacing local almshouses . Dix came into this effort after having met J. O. King,

9393-585: Was adopted in 1970, replacing the 1870 document. The first Farm Aid concert was held in Champaign to benefit American farmers, in 1985. The worst upper Mississippi River flood of the century, the Great Flood of 1993 , inundated many towns and thousands of acres of farmland. Illinois entered the 21st century under Republican Governor George Ryan . Near the end of his term in January 2003, following

9494-531: Was an early claimant to much of Illinois. The Illinois Territory was created on February 3, 1809, with its capital at Kaskaskia , an early French settlement. During the discussions leading up to Illinois's admission to the Union , the proposed northern boundary of the state was moved twice. The original provisions of the Northwest Ordinance had specified a boundary that would have been tangent to

9595-658: Was born and raised in the state. Illinois honors Lincoln with its official state slogan Land of Lincoln . The state is the site of the Abraham Lincoln Presidential Library and Museum in Springfield and the future home of the Barack Obama Presidential Center in Chicago. Illinois has a highly diverse economy , with the global city of Chicago in the northeast, major industrial and agricultural hubs in

9696-513: Was erected in 1867, which continues to serve as the Illinois capitol today. Though it was ostensibly a " free state ", there was nonetheless slavery in Illinois . The ethnic French had owned black slaves since the 1720s, and American settlers had already brought slaves into the area from Kentucky . Slavery was nominally banned by the Northwest Ordinance, but that was not enforced for those already holding slaves. When Illinois became

9797-468: Was important among Native Americans and early French traders as the principal water route connecting the Great Lakes with the Mississippi. The French colonial settlements along these rivers formed the heart of the area known as the Illinois Country in the 17th and 18th centuries. After the construction of the Illinois and Michigan Canal and the Hennepin Canal in the 19th century, the role of

9898-662: Was submerged beneath a shallow sea and located near the Equator. Diverse marine life lived at this time, including trilobites , brachiopods , and crinoids . Changing environmental conditions led to the formation of large coal swamps in the Carboniferous . Illinois was above sea level for at least part of the Mesozoic , but by its end was again submerged by the Western Interior Seaway . This receded by

9999-614: Was topped by a structure thought to have measured about 105 ft (32 m) in length and 48 ft (15 m) in width, covered an area 5,000 sq ft (460 m ), and been as much as 50 ft (15 m) high, making its peak 150 ft (46 m) above the level of the plaza. The finely crafted ornaments and tools recovered by archaeologists at Cahokia include elaborate ceramics, finely sculptured stonework, carefully embossed and engraved copper and mica sheets, and one funeral blanket for an important chief fashioned from 20,000 shell beads. These artifacts indicate that Cahokia

10100-496: Was truly an urban center, with clustered housing, markets, and specialists in toolmaking, hide dressing, potting, jewelry making, shell engraving, weaving and salt making. The civilization vanished in the 15th century for unknown reasons, but historians and archeologists have speculated that the people depleted the area of resources. Many indigenous tribes engaged in constant warfare. According to Suzanne Austin Alchon, "At one site in

10201-553: Was −38 °F (−39 °C), recorded on January 31, 2019, during the January 2019 North American cold wave at a weather station near Mount Carroll , and confirmed on March 5, 2019. This followed the previous record of −36 °F (−38 °C) recorded on January 5, 1999, near Congerville . Prior to the Mount Carroll record, a temperature of −37 °F (−38 °C) was recorded on January 15, 2009, at Rochelle , but at

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