Understanding Expansive Clay and Its Impact on Foundations

Understanding Expansive Clay and Its Impact on Foundations

Explanation of what expansive clay is and how it behaves under different conditions

Explanation of what expansive clay is and how it behaves under different conditions


Expansive clay is a type of soil that has a significant ability to swell when it absorbs water and shrink when it dries out. Discussing financing options helps homeowners budget for foundation repair service residential foundation repair service home inspection. This behavior is primarily due to the presence of certain minerals, such as montmorillonite, which have a high capacity to absorb water molecules between their layers. When water is absorbed, the clay expands, and when it dries, it contracts. This cyclical swelling and shrinking can have profound effects on structures built on or near such soils.

Under wet conditions, expansive clay can increase in volume by a considerable amount. This swelling exerts pressure on foundations, leading to upward movement or heaving. The extent of this movement depends on the moisture content, the type of clay, and the environmental conditions. For instance, during rainy seasons or when irrigation is heavy, the clay absorbs more water, leading to more significant expansion.

Conversely, during dry conditions, such as droughts or prolonged periods without rain, expansive clay loses moisture and contracts. This shrinkage can cause foundations to settle unevenly, leading to cracks in walls, floors, and other structural elements. The differential movement-where some parts of the foundation move more than others-can be particularly damaging.

Understanding the behavior of expansive clay is crucial for engineers and builders. Proper site assessment, including soil testing and analysis, is essential before constructing any structure. Mitigation strategies, such as installing special foundation systems like piers or mats, can help minimize the impact of swelling and shrinking. Additionally, maintaining consistent moisture levels around the foundation through proper drainage and landscaping can also reduce the effects of expansive clay on buildings.

Discussion on the common issues caused by expansive clay in residential foundations


Certainly!

Expansive clay is a type of soil that can significantly impact residential foundations due to its unique properties. When discussing the common issues caused by expansive clay in residential foundations, several key points emerge.

Firstly, expansive clay soils are notorious for their ability to swell when they absorb water and shrink when they dry out. This cyclical behavior, driven by seasonal changes or variations in moisture content, can exert substantial pressure on foundations. The result? Cracks in walls, uneven floors, and misaligned doors and windows. Homeowners often notice these signs after periods of heavy rain or during dry spells, highlighting the direct correlation between moisture levels and foundation stability.

Another critical issue is the differential movement caused by expansive clay. Because not all parts of a foundation will experience the same degree of swelling or shrinking, different sections can move at varying rates. This differential movement can lead to significant structural damage over time, exacerbating the initial cracks and leading to more severe foundation issues.

Furthermore, the presence of expansive clay can complicate the construction process. Builders must take extra precautions during the design and construction phases to mitigate the effects of expansive soils. This might include using deeper foundations, installing specialized drainage systems, or incorporating chemical treatments to stabilize the soil. Failure to address these concerns during construction can lead to costly repairs down the line.

In addition to structural damage, expansive clay can also affect the aesthetics and value of a home. Cracks and uneven surfaces not only look unappealing but can also deter potential buyers if a homeowner decides to sell. This underscores the importance of proactive management and regular inspections to identify and address issues early.

In conclusion, the common issues caused by expansive clay in residential foundations are multifaceted, involving structural damage, differential movement, construction challenges, and aesthetic concerns. Understanding these issues is crucial for homeowners and builders alike to ensure the longevity and stability of residential properties built on expansive clay soils.

Overview of the factors that influence the expansion and contraction of clay soils


Understanding expansive clay and its impact on foundations requires a thorough examination of the factors that influence the expansion and contraction of clay soils. Clay soils are notorious for their ability to swell when they absorb water and shrink when they lose it. This behavior can have significant implications for the stability and integrity of foundations.

One of the primary factors influencing this phenomenon is the type of clay minerals present in the soil. Clays such as montmorillonite have a high cation exchange capacity, making them more prone to expansion compared to kaolinite or illite. The arrangement and structure of these minerals at a microscopic level play a crucial role in determining how much water they can absorb and retain.

Another critical factor is the moisture content in the soil. The amount of water in the environment directly affects the degree of expansion or contraction. During wet seasons or in areas with high rainfall, clay soils tend to absorb more water, leading to expansion. Conversely, during dry periods, the soils lose moisture and contract. This cycle of wetting and drying can cause significant movement in the soil, which translates to stress on any structures built on it.

The presence of vegetation also plays a role. Plants with deep root systems can draw water from the soil, leading to shrinkage.

Understanding Expansive Clay and Its Impact on Foundations - design

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Conversely, areas without vegetation may retain more moisture, promoting expansion. Landscaping practices and the types of plants chosen for an area can thus indirectly influence the behavior of clay soils.

Temperature variations can exacerbate the effects of moisture content. In regions with hot summers, the evaporation rate is high, leading to soil contraction. In colder climates, the freeze-thaw cycle can introduce additional stress on the soil structure, further complicating the expansion and contraction dynamics.

Lastly, human activities such as irrigation, construction, and landscaping can significantly alter the natural moisture balance of clay soils. For instance, leaking pipes or irrigation systems can introduce additional water into the soil, promoting expansion. Conversely, construction activities that compact the soil can reduce its ability to absorb water, leading to less expansion but potentially more contraction during dry periods.

In conclusion, the expansion and contraction of clay soils are influenced by a complex interplay of factors including the type of clay minerals, moisture content, vegetation, temperature variations, and human activities. Understanding these factors is essential for designing foundations that can withstand the dynamic nature of expansive clay soils, ensuring the longevity and stability of structures built on them.

Examination of the methods used to identify expansive clay in a property


When it comes to buying or constructing a property, one of the critical aspects to consider is the type of soil present on the site. Among the various soil types, expansive clay poses unique challenges, particularly to foundations. Understanding how to identify expansive clay is vital for ensuring the structural integrity and longevity of any building.

Understanding Expansive Clay and Its Impact on Foundations - design

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This essay delves into the methods used to identify expansive clay in a property.

Firstly, visual inspection is often the initial step in identifying expansive clay. Experienced professionals can sometimes spot the characteristic signs of expansive clay, such as cracks in the ground that appear and disappear with changes in moisture content. These cracks can be particularly noticeable after periods of heavy rain or drought. Additionally, the presence of certain vegetation types, such as deep-rooted trees, can indicate the likelihood of expansive clay below the surface.

Laboratory testing provides a more definitive method for identifying expansive clay. Soil samples are collected from various depths across the property and sent to a laboratory for analysis. One common test is the Atterberg Limits test, which determines the soil's plasticity and helps identify the presence of clay minerals. Another crucial test is the swelling pressure test, which measures the force exerted by the clay when it absorbs water. High swelling pressure is a strong indicator of expansive clay.

In-situ testing is another effective method for identifying expansive clay. Techniques such as the Standard Penetration Test (SPT) or Cone Penetration Test (CPT) can provide valuable data about the soil's properties without removing it from the site. These tests help assess the soil's density, moisture content, and swelling potential, offering a comprehensive understanding of the subsurface conditions.

Geophysical methods, such as ground-penetrating radar (GPR) and electrical resistivity tomography (ERT), are increasingly being used to identify expansive clay. These non-invasive techniques allow professionals to create detailed subsurface profiles, revealing the presence and extent of expansive clay layers without disturbing the soil.

Lastly, historical data and local knowledge can provide valuable insights. Consulting with local geologists, engineers, and long-time residents can offer anecdotal evidence and historical records that indicate the presence of expansive clay in the area.

In conclusion, identifying expansive clay in a property requires a combination of visual inspection, laboratory testing, in-situ testing, geophysical methods, and local knowledge. By employing these methods, property owners and developers can make informed decisions to mitigate the risks associated with expansive clay, ensuring the stability and safety of their structures.

Description of the techniques and materials used in repairing foundations affected by expansive clay


Repairing foundations affected by expansive clay requires a thorough understanding of the soil's behavior and the appropriate techniques and materials to mitigate its effects. Expansive clay, known for its ability to swell when it absorbs water and shrink as it dries, can cause significant damage to foundations over time. Here are some commonly used techniques and materials for repairing such foundations:

1. **Soil Modification**: One of the primary approaches is to alter the properties of the expansive clay. This can be achieved by adding materials like lime or gypsum to the soil. These amendments help to stabilize the soil, reducing its ability to swell and shrink. The process involves excavating the soil around the foundation, mixing it with the stabilizing agent, and then compacting it back into place.

2. **Moisture Control**: Managing the moisture content around the foundation is crucial. Techniques such as installing drainage systems, ensuring proper grading around the building, and using waterproof membranes can help prevent water from accumulating near the foundation. This reduces the potential for swelling caused by moisture absorption.

3. **Pier and Helical Piers**: For more severe cases, underpinning the foundation with piers can provide additional support and stability. Pier and helical piers are driven deep into the ground, below the active zone of the expansive clay, to reach more stable soil or bedrock. This method transfers the load of the structure to a depth where the soil is less affected by moisture changes.

4. **Chemical Grouting**: Injecting chemical grouts into the soil can also help stabilize expansive clay. These grouts fill the voids in the soil, reducing its permeability and its ability to absorb water. This technique is particularly useful in areas where traditional underpinning is not feasible.

5. **Slabjacking**: When the foundation has settled unevenly due to expansive clay, slabjacking can be an effective solution. This involves pumping a slurry mixture beneath the concrete slab to lift and level it. The slurry typically consists of a combination of cement, sand, and water, which hardens to provide support.

6. **Regular Monitoring and Maintenance**: After repairs, it's essential to monitor the foundation regularly for any signs of movement. Maintaining consistent moisture levels around the foundation and ensuring that drainage systems are functioning correctly can help prevent future issues.

In conclusion, repairing foundations affected by expansive clay requires a combination of soil modification, moisture control, structural support, and ongoing maintenance. By employing these techniques and materials, it's possible to mitigate the impact of expansive clay and protect the integrity of the foundation.

Case studies highlighting successful residential foundation repair projects involving expansive clay


Certainly! Here's a short essay on the topic of "Case studies highlighting successful residential foundation repair projects involving expansive clay" for the subject of "Understanding Expansive Clay and Its Impact on Foundations."

Expansive clay soils are a significant concern for homeowners and builders alike, particularly in regions where these soils are prevalent. When water content in expansive clay changes, it can lead to significant expansion and contraction, which in turn can cause severe damage to residential foundations. Understanding the behavior of expansive clay and implementing effective repair strategies is crucial for maintaining the structural integrity of homes. This essay explores case studies that highlight successful residential foundation repair projects involving expansive clay, shedding light on the methods and techniques that have proven effective.

One notable case study involves a residential property in Texas, an area well-known for its expansive clay soils. The homeowners noticed cracks in their foundation and doors that no longer closed properly, clear signs of foundation movement. After a thorough soil analysis and assessment, it was determined that the foundation issues were due to the expansive clay beneath the house. The repair team employed a combination of techniques, including the installation of helical piers and the use of a chemical grout to stabilize the soil. The helical piers were driven deep into the ground, beyond the active zone of the clay, to provide a stable foundation. The chemical grout was injected into the soil to fill voids and reduce its expansive properties. Post-repair, the homeowners reported no further issues, and the property's value was preserved.

Another compelling case study comes from Arizona, where a family home was experiencing significant foundation problems. The repair process began with a detailed soil evaluation to understand the extent of the expansive clay issue. The chosen repair method involved the use of push piers, which were installed at strategic points around the foundation. These piers were pushed deep into the stable soil layers, effectively transferring the home's load and counteracting the effects of the expansive clay. Additionally, a moisture management system was installed to control the water content in the soil, preventing future expansion and contraction. The outcome was a stabilized foundation and a relieved family, confident in the long-term safety of their home.

These case studies underscore the importance of a tailored approach to foundation repair in areas with expansive clay soils.

Understanding Expansive Clay and Its Impact on Foundations - radon mitigation

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Successful projects often involve a combination of deep foundation support systems, such as helical piers or push piers, and soil stabilization techniques, including chemical grouts and moisture management systems. Each project must be carefully assessed to determine the most effective combination of methods, ensuring the foundation's stability and the home's longevity. Through these examples, we gain valuable insights into the strategies that can mitigate the challenges posed by expansive clay, protecting homes and enhancing community resilience.



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Chicago metropolitan area
Conurbation
Chicago–Naperville, IL–IN–WI
Combined Statistical Area
From top, left to right: Chicago skyline from Lakefront Trail at Northerly Island during sunrise, aerial view Evanston, view of Gold Coast, Downtown Naperville, view of Downtown Aurora
Map
Map of Chicago–Naperville, IL–IN–WI CSA
  Chicago–Naperville–Schaumburg, IL
  Elgin, IL Metropolitan Division
  Lake County, IL Metropolitan Division
  Lake County–Porter County–Jasper Cty, IN

Other Statistical Areas in the Chicago CSA

  Kenosha, WI MSA
  Ottawa, IL µSA
  Michigan City–La Porte, IN MSA
  Kankakee, IL MSA

 

Country United StatesStates Illinois
Indiana
WisconsinCore city ChicagoSatellite cities

  •  - Aurora
  •  - Elgin
  •  - Crystal Lake
  •  - Joliet
  •  - Naperville
  •  - Schaumburg
  •  - Waukegan
  •  - Kankakee
  •  - Gary
  •  - Hammond
  •  - Michigan City
  •  - Kenosha

Area

 

 • Metro

 

10,856 sq mi (28,120 km2)Highest elevation

[1]

673 ft (205 m)Lowest elevation

[1]

579 ft (176 m)Population

 

 • Density886/sq mi (342/km2) • Metropolitan Statistical Area (MSA) (2022)

 

9,441,957[2] (3rd) • Combined Statistical Area (CSA) (2022)

 

9,806,184 [3] (4th)DemonymChicagolanderGDP

[4]

 • Metropolitan Statistical Area (MSA)$894.862 billion (2023) • Combined Statistical Area (CSA)$919.229 billion (2023)Time zoneUTC−6 (CST) • Summer (DST)UTC−5 (CDT)Area codes219, 224/847, 262, 312/872, 331/630, 574, 464/708, 773/872 and 779/815

The Chicago metropolitan area, also referred to as Chicagoland, is the largest metropolitan statistical area in the U.S. state of Illinois, and the Midwest, containing the City of Chicago along with its surrounding suburbs and satellite cities. Encompassing 10,286 square mi (28,120 km2), the metropolitan area includes the city of Chicago, its suburbs and hinterland, that span 13 counties across northeast Illinois and northwest Indiana. The MSA had a 2020 census population of 9,618,502 and the combined statistical area, which spans 19 counties and additionally extends into southeast Wisconsin, had a population of nearly 10 million people.[5][6] The Chicago area is the third-largest metropolitan area in the United States and the fourth-largest metropolitan area in North America (after Mexico City, New York City, and Los Angeles), and the largest in the Great Lakes megalopolis. Its urban area is one of the 40 largest in the world.

According to the 2020 census, the metropolitan's population is approaching the 10 million mark. The metropolitan area has seen a substantial increase of Latin American residents on top of its already large Latino population, and the Asian American population also increased according to the 2020 Census. The metro area has a large number of White, Black, Latino, Asian, and Arab American residents, and also has Native American residents in the region, making the Chicago metropolitan area population truly diverse. The Chicago metropolitan area represents about 3 percent of the entire US population.

Chicagoland has one of the world's largest and most diversified economies. With more than six million full and part-time employees, the Chicago metropolitan area is a key factor of the Illinois economy, as the state has an annual GDP of over $1 trillion.[7] The Chicago metropolitan area generated an annual gross regional product (GRP) of approximately $700 billion in 2018.[8] The region is home to more than 400 major corporate headquarters, including 31 in the Fortune 500[9] such as McDonald's, United, and Blue Cross Blue Shield. With many companies moving to Chicagoland, and many current companies expanding, the area ranked as the nation's top metropolitan area for corporation relocations and expansions for nine consecutive years, the most consecutive years for any region in the country.[10]

The Chicago area is home to a number of the nation's leading research universities including the University of Chicago, Northwestern University, the University of Illinois at Chicago, DePaul University, Loyola University, and the Illinois Institute of Technology (IIT). The University of Chicago and Northwestern University are consistently ranked as two of the best universities in the world.

There are many transportation options around the region. Chicagoland has three separate rail networks; the Chicago Transit Authority (CTA), Metra, and the South Shore Line. The CTA operates elevated and subway lines that run primarily throughout the city, Downtown Chicago, and into some suburbs. The CTA operates some of its rail lines 24 hours a day, every day of the year, nonstop service, making Chicago, New York City, and Copenhagen the only three cities in the world to offer some 24 hour rail service running nonstop, everyday throughout their city limits. The Metra commuter rail network runs numerous lines between Downtown Chicago and suburban/satellite cities, with one line stretching to Kenosha, Wisconsin, which is part of the Chicago metropolitan area. The interurban South Shore Line runs between Downtown Chicago and the northwest Indiana portion of the metropolitan area. In addition, Amtrak operates Union Station in Downtown Chicago as one of its largest rail hubs, with numerous lines radiating to and from the station.

CTA bus routes serve the city proper, with some service into the suburbs. Pace bus routes serve the suburbs, with some service into the city. In addition, numerous CTA bus routes operate 24 hours a day, nonstop.

Definitions

[edit]

Chicago Metropolitan statistical area

[edit]
The Chicago–Naperville, IL–IN–WI Combined Statistical Area as defined by the U.S. Office of Management and Budget:
  Chicago–Naperville–Elgin, IL–IN–WI MSA
  Michigan City–La Porte, IN MSA
  Kankakee, IL MSA
  Ottawa, IL MSA

The Chicago metropolitan statistical area (MSA) was originally designated by the United States Census Bureau in 1950. It comprised the Illinois counties of Cook, DuPage, Kane, Lake and Will, along with Lake County in Indiana. As surrounding counties saw an increase in their population densities and the number of their residents employed within Cook County, they met Census criteria to be added to the MSA. The Chicago MSA, now defined by the U.S. Office of Management and Budget (OMB) as the Chicago–Naperville–Elgin, IL–IN–WI Metropolitan Statistical Area, is the third-largest MSA by population in the United States. The 2022 census estimate for the population of the MSA was 9,441,957.[11]

The Chicago MSA is further subdivided into four metropolitan divisions. A breakdown of the county constituents and 2021 estimated populations of the four metropolitan divisions of the MSA are as follows:[11]

Chicago–Naperville–Elgin, IL–IN–WI Metropolitan Statistical Area (9,509,934)

  • Chicago–Naperville–Schaumburg, IL Metropolitan Division (7,159,394)
    • Cook County, Illinois (5,173,146)
    • DuPage County, Illinois (924,885)
    • Grundy County, Illinois (52,989)
    • McHenry County, Illinois (311,122)
    • Will County, Illinois (697,252)
  • Elgin, IL Metropolitan Division (750,869)
    • DeKalb County, Illinois (100,414)
    • Kane County, Illinois (515,588)
    • Kendall County, Illinois (134,867)
  • Lake County, IL Metropolitan Division (711,239)
    • Lake County, Illinois (711,239)
  • Lake County–Porter County–Jasper County, IN Metropolitan Division (719,700)
    • Jasper County, Indiana (33,091)
    • Lake County, Indiana (498,558)
    • Newton County, Indiana (13,808)
    • Porter County, Indiana (174,243)

Combined statistical area

[edit]

The OMB also defines a slightly larger region as a combined statistical area (CSA). The Chicago–Naperville, IL–IN–WI Combined Statistical Area combines the following core-based statistical areas, listed with their 2021 estimated populations. The combined statistical area as a whole had a population of 9,806,184 as of 2022.[11]

  • Chicago–Naperville–Elgin, IL–IN–WI metropolitan statistical area (9,509,934)
  • Kankakee, IL metropolitan statistical area (106,601)
    • Kankakee County, Illinois (106,601)
  • Michigan City–La Porte, IN metropolitan statistical area (112,390)
    • LaPorte County, Indiana (112,390)
  • Ottawa, IL micropolitan statistical area (147,414)
    • Bureau County, Illinois (32,883)
    • LaSalle County, Illinois (108,965)
    • Putnam County, Illinois (5,566)

United Nations' Chicago urban agglomeration

[edit]

The Chicago urban agglomeration, according to the United Nations World Urbanization Prospects report (2023 revision), lists a population of 8,937,000.[12] The term "urban agglomeration" refers to the population contained within the contours of a contiguous territory inhabited at urban density levels. It usually incorporates the population in a city, plus that in the contiguous urban, or built-up area.

Chicagoland

[edit]
Chicagoland by county and state[13]
A map of Chicagoland in relation to the states of Wisconsin, Illinois, and Indiana

Chicagoland is an informal name for the Chicago metropolitan area. The term Chicagoland has no official definition, and the region is often considered to include areas beyond the corresponding MSA, as well as portions of the greater CSA.[citation needed]

Colonel Robert R. McCormick, editor and publisher of the Chicago Tribune, usually gets credit for placing the term in common use.[14][15] McCormick's conception of Chicagoland stretched all the way to nearby parts of four states (Indiana, Wisconsin, Michigan, and Iowa).[14] The first usage was in the Tribune's July 27, 1926, front page headline, "Chicagoland's Shrines: A Tour of Discoveries", for an article by reporter James O'Donnell Bennett.[16] He stated that Chicagoland comprised everything in a 200-mile (320 km) radius in every direction and reported on many different places in the area. The Tribune was the dominant newspaper in a vast area stretching to the west of the city, and that hinterland was closely tied to the metropolis by rail lines and commercial links.[17]

Today, the Chicago Tribune's usage includes the city of Chicago, the rest of Cook County, eight nearby Illinois counties (Lake, McHenry, DuPage, Kane, Kendall, Grundy, Will, and Kankakee), and the two Indiana counties of Lake and Porter.[18] Illinois Department of Tourism literature uses Chicagoland for suburbs in Cook, Lake, DuPage, Kane, and Will counties,[19] treating the city separately. The Chicagoland Chamber of Commerce defines it as all of Cook, DuPage, Kane, Lake, McHenry, and Will counties.[20]

In addition, company marketing programs such as Construction Data Company's[21] "Chicago and Vicinity" region and the Chicago Automobile Trade Association's "Chicagoland and Northwest Indiana" advertising campaign are directed at the MSA itself, as well as LaSalle, Winnebago (Rockford), Boone, and Ogle counties in Illinois, in addition to Jasper, Newton, and La Porte counties in Indiana and Kenosha, Racine, and Walworth counties in Wisconsin, and even as far northeast as Berrien County, Michigan. The region is part of the Great Lakes Megalopolis, containing an estimated 54 million people.[citation needed]

Collar counties

[edit]

The term "collar counties" is a colloquialism for the five counties (DuPage, Kane, Lake, McHenry, and Will) of Illinois that border Chicago's Cook County. After Cook County, they are also the next five most populous counties in the state. According to the Encyclopedia of Chicago, there is no specifically known origin of the phrase, but it has been commonly used among policy makers, urban planners, and in the media. However, it also notes that as growth has spread beyond these counties, it may have lost some of its usefulness.[22]

Chicago Metropolitan Agency for Planning

[edit]

Chicago Metropolitan Agency for Planning (CMAP) is an Illinois state agency responsible for transportation infrastructure, land use, and long-term economic development planning for the areas under its jurisdiction within Illinois.[23] The planning area has a population of over 8 million, which includes the following locations in Illinois:[24]

  • Cook County
  • DuPage County
  • Kane County
  • Kendall County
  • Lake County
  • McHenry County
  • Will County
 
 
Panorama of North Avenue Beach

Geography and environment

[edit]

The city of Chicago lies in the Chicago Plain, a flat and broad area characterized by little topographical relief. The few low hills are sand ridges. North of the Chicago Plain, steep bluffs and ravines run alongside Lake Michigan.

Along the southern shore of the Chicago Plain, sand dunes run alongside the lake. The tallest dunes reach up to near 200 feet (61 m) and are found in Indiana Dunes National Park. Surrounding the low plain are bands of moraines in the south and west suburbs. These areas are higher and hillier than the Chicago Plain. A continental divide, separating the Mississippi River watershed from that of the Great Lakes and Saint Lawrence River, runs through the Chicago area.

A 2012 survey of the urban trees and forests in the seven county Illinois section of the Chicago area found that 21% of the land is covered by the tree and shrub canopy, made up of about 157,142,000 trees. The five most common tree species are buckthorn, green ash, boxelder, black cherry, and American elm. These resources perform important functions in carbon storage, water recycling, and energy saving.[25][26]

The Chicago skyline
 
Night aerial view of Chicago and vicinity

Demographics

[edit]
Taken from the ISS on June 23, 2022; downtown Chicago is at the center by the lake.

As of 2022, the metropolitan area had a population of 9,442,159. The population density was 1,312.3 per square mile. The racial makeup was 50.1% Non-Hispanic White, 23.4% were Hispanic, 15.5% were Non-Hispanic African Americans, 7.2% were Asian, 0.1% were Non-Hispanic Native American, 0.4% identified as “some other race,” and 3.2% were non-Hispanic multiracial.[27]

According to 2022 estimates from the American Community Survey, the largest ancestries in the Chicago metro area were Mexican (18%), African (17.7%), German (12.8%), Irish (9.9%), Polish (8%), Italian (5.9%), English (5.2%), Indian (2.7%), Puerto Rican (2.3%), Filipino (1.7%), Swedish (1.5%), and Chinese (1.4%).[28][29][30][31]

The suburbs, surrounded by easily annexed flat ground, have been expanding at a tremendous rate since the early 1960s. Aurora, Elgin, Joliet, and Naperville are noteworthy for being four of the few boomburbs outside the Sun Belt, West Coast and Mountain States regions, and exurban Kendall County ranked as the fastest-growing county (among counties with a population greater than 10,000) in the United States between the years 2000 and 2007.[32]

Settlement patterns in the Chicago metropolitan area tend to follow those in the city proper: the northern and northwestern suburbs are generally affluent and upper-middle class, while the southern suburbs (sometimes known as Chicago Southland) have somewhat lower median incomes and a cost of living, with the exception being the southwest suburbs which contain many upper-middle class areas. Another exception to this is the West Side, which has a somewhat lower median income, but the western suburbs contain many affluent and upper-middle class areas. According to the 2000 Census, DuPage County as a whole had the highest median household income of any county in the Midwestern United States, although there are individual cities and towns in other surrounding counties in the metro that have even higher median incomes.

According to 2022 estimates from the U.S. Census, poverty rates of the largest counties from least poverty to most are as follows: McHenry 4.0%, Dupage 6.7%, Will 6.9%, Kane 7.8%, Lake 8.0%, and Cook 13.6%.[33] However, Cook County, which contains luxury high rises and expensive houses in sections of the city and expensive houses along the waterfront in the North Shore area, would also have the highest percentage of expensive homes in the region.

In an in-depth historical analysis, Keating (2004, 2005) examined the origins of 233 settlements that by 1900 had become suburbs or city neighborhoods of the Chicago metropolitan area. The settlements began as farm centers (41%), industrial towns (30%), residential railroad suburbs (15%), and recreational/institutional centers (13%). Although relations between the different settlement types were at times contentious, there also was cooperation in such undertakings as the construction of high schools.[citation needed]

Population

[edit]

As the Chicago metropolitan area has grown, more counties have been partly or totally assimilated with the taking of each decennial census.

Census Area Area Type 2020 census 2010 census 2000 census 1990 census 1980 Census 1970 census 1960 census 1950 census
Chicago-Naperville-Joliet, IL-IN-WI Metropolitan 9,618,502 9,461,105 9,098,316 8,065,633 7,869,542 7,612,314 6,794,461 5,495,364
Cook County, Illinois Metropolitan 5,275,541 5,194,675 5,376,741 5,105,067 5,253,655 5,492,369 5,129,725 4,508,792
DeKalb County, Illinois Metropolitan 100,420 105,160 88,969 77,932 74,624 71,654 51,714 40,781
DuPage County, Illinois Metropolitan 932,877 916,924 904,161 781,666 658,835 491,882 313,459 154,599
Grundy County, Illinois Metropolitan 52,533 50,063 37,535 32,337 30,582 26,535 22,350 19,217
Kane County, Illinois Metropolitan 516,522 515,269 404,119 317,471 278,405 251,005 208,246 150,388
Kendall County, Illinois Metropolitan 131,869 114,736 54,544 39,413 37,202 26,374 17,540 12,115
McHenry County, Illinois Metropolitan 310,229 308,760 260,077 183,241 147,897 111,555 84,210 50,656
Will County, Illinois Metropolitan 696,355 677,560 502,266 357,313 324,460 249,498 191,617 134,336
Jasper County, Indiana Metropolitan 32,918 33,478 30,043 24,960 26,138 20,429 18,842 17,031
Lake County, Indiana Metropolitan 498,700 496,005 484,564 475,594 522,965 546,253 513,269 368,152
Newton County, Indiana Metropolitan 13,830 14,244 14,566 13,551 14,844 11,606 11,502 11,006
Porter County, Indiana Metropolitan 173,215 164,343 146,798 128,932 119,816 87,114 60,279 40,076
Lake County, Illinois Metropolitan 714,342 703,462 644,356 516,418 440,372 382,638 293,656 179,097
Kenosha County, Wisconsin Metropolitan 169,151 166,426 149,577 128,181 123,137 117,917 100,615 75,238
Kankakee County, Illinois Combined 107,502 113,449 103,833 96,255 102,926 97,250 92,063 73,524
LaSalle County, Illinois Combined 109,658 113,924 111,509 106,913 112,003 111,409 110,800 100,610
Bureau County, Illinois Combined 33,244 34,978 35,503 35,688 39,114 38,541 37,594 37,711
Putnam County, Illinois Combined 5,637 6,006 6,086 5,730 6,085 5,007 4,570 4,746
LaPorte County, Indiana Combined 112,417 111,467 110,106 107,066 108,632 105,342 95,111 76,808
Chicago-Naperville-Joliet, IL-IN-WI Combined 9,986,960 9,686,021 9,312,255 8,385,397 8,264,490 8,089,421 7,204,198 5,911,816

Counties highlighted in gray were not included in the MSA for that census. The CSA totals in blue are the totals of all the counties listed above, regardless of whether they were included in the Chicago Combined Statistical Area at the time.[34]

Principal municipalities

[edit]

Over 1,000,000 population

[edit]
  • Chicago (2,746,388)

Over 100,000 population

[edit]
  • Aurora, Illinois (180,542)
  • Joliet, Illinois (150,362)
  • Naperville, Illinois (149,540)
  • Elgin, Illinois (114,797)

Over 50,000 population

[edit]
  • Kenosha, Wisconsin (99,986)
  • Waukegan, Illinois (89,321)
  • Cicero, Illinois (85,268)
  • Schaumburg, Illinois (78,723)
  • Evanston, Illinois (78,110)
  • Hammond, Indiana (77,879)
  • Arlington Heights, Illinois (77,676)
  • Bolingbrook, Illinois (73,922)
  • Gary, Indiana (69,093)
  • Palatine, Illinois (67,908)
  • Skokie, Illinois (67,824)
  • Des Plaines, Illinois (60,675)
  • Orland Park, Illinois (58,703)
  • Oak Lawn, Illinois (58,362)
  • Berwyn, Illinois (57,250)
  • Mount Prospect, Illinois (56,852)
  • Tinley Park, Illinois (55,971)
  • Oak Park, Illinois (54,583)
  • Wheaton, Illinois (53,970)
  • Downers Grove, Illinois (50,247)
 
View of Chicago greater metropolitan region and the dense downtown area from the Willis Tower
 
View of Chicago greater metropolitan region and the North branch of the Chicago River from the Willis Tower

Urban areas within

[edit]

Within the boundary of the 16-county Chicago Combined Statistical Area lies the Chicago urban area, as well as 26 smaller urban areas.[35] Some of the urban areas below may partially cross into other statistical areas. Only those situated primarily within the Chicago combined statistical area are listed here.

Urban areas contained within the Chicago combined statistical area as of the 2020 census:
  Urban areas
  Counties in the Chicago MSA
  Counties in the Chicago CSA but not the MSA
Urban area Population
(2020 census)
Land area
(sq mi)
Land area
(km2)
Density
(population / sq mi)
Density
(population / km2)
Chicago, IL–IN 8,671,746 2,337.89 6,055.09 3,709.2 1,432.1
Round Lake Beach–McHenry–Grayslake, IL–WI 261,835 127.61 330.52 2,051.8 792.2
Kenosha, WI 125,865 56.17 145.48 2,240.8 865.2
Michigan City–La Porte, IN–MI 71,367 49.16 127.32 1,451.7 560.5
Kankakee, IL 66,530 31.66 82.00 2,101.4 811.3
DeKalb, IL 64,736 25.63 66.39 2,525.6 975.1
Valparaiso–Shorewood Forest, IN 51,867 33.64 87.12 1,542.0 595.4
Peru–LaSalle, IL 29,763 21.45 55.56 1,387.4 535.7
Woodstock, IL 25,298 9.31 24.10 2,718.7 1,049.7
Ottawa, IL 20,122 9.99 25.87 2,014.2 777.7
Streator, IL 16,209 8.12 21.04 1,995.3 770.4
Coal City–Braidwood, IL 15,837 10.29 26.65 1,539.4 594.4
Morris, IL 15,740 8.64 22.37 1,822.2 703.5
Lowell, IN 10,747 5.28 13.66 2,037.2 786.6
Manteno, IL 10,437 6.01 15.56 1,736.8 670.6
Harvard, IL 9,376 4.36 11.30 2,148.7 829.6
Princeton, IL 7,979 6.20 16.06 1,287.1 497.0
Marengo, IL 7,509 3.81 9.86 1,971.5 761.2
Lake Holiday, IL 7,313 4.30 11.14 1,700.5 656.6
Mendota, IL 6,918 2.85 7.38 2,426.2 936.8
Wilmington, IL 6,388 3.95 10.23 1,617.3 624.5
McHenry Northwest–Wonder Lake, IL 5,758 2.35 6.08 2,453.6 947.4
Hampshire, IL 5,699 2.72 7.06 2,091.4 807.5
Rensselaer, IN 5,509 3.23 8.37 1,703.9 657.9
Genoa, IL 5,484 2.20 5.69 2,498.0 964.5
Westville, IN 5,189 2.10 5.45 2,466.0 952.1
Marseilles, IL 4,660 2.39 6.19 1,948.4 752.3

Economy

[edit]
Westward view from the Willis Tower in Chicago

The Chicago metropolitan area is home to the corporate headquarters of 57 Fortune 1000 companies, including AbbVie Inc., Allstate, Kraft Heinz, McDonald's, Mondelez International, Motorola, United Airlines, Walgreens, and more. The Chicago area also headquarters a wide variety of global financial institutions including Citadel LLC, Discover Financial Services, Morningstar, Inc., CNA Financial, and more. Chicago is home to the largest futures exchange in the world, the Chicago Mercantile Exchange. In March 2008, the Chicago Mercantile Exchange announced its acquisition of NYMEX Holdings Inc, the parent company of the New York Mercantile Exchange and Commodity Exchange. CME'S acquisition of NYMEX was completed in August 2008.

A key piece of infrastructure for several generations was the Union Stock Yards of Chicago, which from 1865 until 1971 penned and slaughtered millions of cattle and hogs into standardized cuts of beef and pork. This prompted poet Carl Sandburg to describe Chicago as the "Hog Butcher for the World".[36]

The Chicago area, meanwhile, began to produce significant quantities of telecommunications gear, electronics, steel, crude oil derivatives, automobiles, and industrial capital goods.

By the early 2000s, Illinois' economy had moved toward a dependence on high-value-added services, such as financial trading, higher education, logistics, and health care. In some cases, these services clustered around institutions that hearkened back to Illinois's earlier economies. For example, the Chicago Mercantile Exchange, a trading exchange for global derivatives, had begun its life as an agricultural futures market.

In 2007, the area ranked first among U.S. metro areas in the number of new and expanded corporate facilities.[37] It ranked third in 2008, behind the Houston–Sugar Land–Baytown and Dallas–Fort Worth metropolitan areas,[38] and ranked second behind the New York metropolitan area in 2009.[39]

The Wall Street Journal summarized the Chicago area's economy in November 2006 with the comment that "Chicago has survived by repeatedly reinventing itself."[40]

Transportation

[edit]
O'Hare Airport
Chicago 'L' in the Loop
Metra surface rail
The Eisenhower Expressway with the Chicago Transit Authority Blue Line tracks and the non-revenue ramp that leads to the Pink Line

Major airports

[edit]
  • Chicago O'Hare International Airport (ORD)
  • Chicago Midway International Airport (MDW)
  • Milwaukee Mitchell International Airport (MKE) (located in the adjacent Milwaukee metropolitan area)
  • Chicago Rockford International Airport (RFD) (located in the adjacent Rockford metropolitan area)
  • Gary/Chicago International Airport (GYY)

Commercial ports

[edit]
  • Port of Chicago
  • Port of Indiana-Burns Harbor

Transit systems

[edit]

Commercial freight

[edit]

Chicago has been at the center of the United States' railroad network since the 19th century. Almost all Class I railroads serve the area, the most in North America.[41]

Passenger

[edit]
  • Chicago Transit Authority trains, locally referred to as "the 'L'", (after "elevated train") serving Chicago and the near suburbs
  • Pace Suburban Bus operates suburban bus and regional vanpool, paratransit, and ride-matching services in the Chicagoland region.
  • Metra run by the Northeast Illinois Regional Commuter Railroad Corporation:
    • 4 lines serving southern Cook County and Will County
    • 3 lines serving western Cook County, DuPage County, and Kane County
    • 2 lines serving northern Cook County and Lake County
    • 1 line serving northern Cook County, Lake County, and Kenosha County
    • 1 line serving northwestern Cook County and McHenry County
  • South Shore Line shares the Metra Electric Line in Illinois and connects Chicago to Gary, Michigan City, and ending at South Bend.
  • Amtrak operates Union Station which is the major Amtrak passenger rail hub with connections to Metra and the within a few blocks of connections to several 'L' lines. Amtrak also operates a connecting station out of Joliet.

Major highways

[edit]

Interstates

[edit]
  • Interstate 41 (I-41) runs concurrently with Interstate 94 from the northern terminus of the Tri-State Tollway to Milwaukee.
  • Interstate 55 (I-55) is the Adlai Stevenson Expy.
  • I-355 is the Veterans Memorial Tollway (formerly North-South Tollway).
  • I-57 is unofficially the "West Leg" of the Dan Ryan Expy.
  • I-65 has no name, whether official or unofficial.
  • I-80 is officially called the Borman Expy (cosigned with I-94), Kingery Expy (cosigned with I-94 for 3 miles), Tri-State Tollway (cosigned with I-294 for 4 miles) and is unofficially called the Moline Expy west of I-294.
  • I-88 is the Ronald Reagan Memorial Tollway (formerly East-West Tollway)
  • I-90 is locally known as Jane Addams Tollway (formerly Northwest Tollway), John F. Kennedy Expy (cosigned with I-94), Dan Ryan Expy (cosigned with I-94), and Chicago Skyway Toll Bridge.
  • I-94 is Tri-State Tollway in Lake County, Edens Spur, Edens Expy, John F. Kennedy Expy (cosigned with I-90), Dan Ryan Expy (cosigned with I-90), Bishop Ford Frwy (formerly Calumet Expy), Kingery Expy (cosigned with I-80) and Borman Expy (cosigned with I-80).
  • I-190 is the John F. Kennedy Expy spur heading into Chicago-O'Hare Int'l Airport.
  • I-290 is the Dwight D. Eisenhower Expy.
  • I-294 is the Tri-State Tollway.

Other main highways

[edit]
  • US Routes in the Illinois part of the area include: US 6, US 12, US 14, US 20, US 30, US 34, US 41, US 45, and US 52.
  • Illinois Route 53, an arterial north–south state highway running through Grundy, Will, DuPage, Cook and Lake counties
  • Historic US Route 66's eastern terminus is in Chicago.

Major corridors

[edit]

In addition to the Chicago Loop, the metro area is home to a few important subregional corridors of commercial activities. Among them are:

  • Illinois Technology and Research Corridor, along the Ronald Reagan Memorial Tollway (Interstate 88)
  • Golden Corridor, along the Jane Addams Memorial Tollway (Interstate 90)
  • Lakeshore Corridor, along the Edens Expressway and Tri-State Tollway

Culture

[edit]

Sports

[edit]

Listing of the professional sports teams in the Chicago metropolitan area

Major league professional teams:

  • Major League Baseball (MLB)
    • Chicago Cubs
    • Chicago White Sox
  • National Football League (NFL)
    • Chicago Bears
  • National Basketball Association (NBA)
    • Chicago Bulls
  • National Hockey League (NHL)
    • Chicago Blackhawks
  • Major League Soccer (MLS)
    • Chicago Fire FC

Other professional teams:

  • Women's National Basketball Association (WNBA)
    • Chicago Sky
  • National Women's Soccer League (NWSL)
    • Chicago Stars FC
  • American Association of Professional Baseball (AA)
    • Chicago Dogs
    • Kane County Cougars
    • Gary SouthShore RailCats
  • American Hockey League (AHL)
    • Chicago Wolves
  • NBA G League (NBAGL)
    • Windy City Bulls
  • Major League Rugby (MLR)
    • Chicago Hounds

The Chicagoland Speedway oval track has hosted NASCAR Cup Series and IndyCar Series races. The Chicago Marathon is one of the World Marathon Majors. The Western Open and BMW Championship are PGA Tour tournaments that have been held primarily at golf courses near Chicago.

NCAA Division I College Sports Teams:

  • Atlantic 10 Conference
    • Loyola University Chicago Ramblers
  • Big East Conference
    • DePaul University Blue Demons
  • Big Ten Conference
    • Northwestern University Wildcats (Evanston)
  • Mid-American Conference
    • Northern Illinois University Huskies (DeKalb)
  • Missouri Valley Conference
    • University of Illinois Chicago Flames
    • Valparaiso University Beacons (Valparaiso, IN)
  • Northeast Conference
    • Chicago State University Cougars

Cuisine

[edit]
  • Chicago-style hot dog
  • Chicago-style pizza
  • Italian beef
  • Caramel popcorn

Media

[edit]

The two main newspapers are the Chicago Tribune and the Chicago Sun-Times. Local television channels broadcasting to the Chicago market include WBBM-TV 2 (CBS), WMAQ-TV 5 (NBC), WLS-TV 7 (ABC), WGN-TV 9 (Ind), WTTW 11 (PBS), MeTV 23, WCIU 26 (CW), WFLD 32 (FOX), WCPX-TV 38 (Ion), WSNS-TV 44 (Telemundo), WPWR-TV 50 (MyNetworkTV), and WJYS-TV 62 (The Way). Radio stations serving the area include: WBBM (AM), WBEZ, WGN (AM), WMBI, WLS (AM), and WSCR.

Education

[edit]
Whitney M. Young Magnet High School in Chicago

Elementary and secondary education within the Chicago metropolitan area is provided by dozens of different school districts, of which by far the largest is the Chicago Public Schools with 400,000 students.[42] Numerous private and religious school systems are also found in the region, as well as a growing number of charter schools. Racial inequalities in education in the region remain widespread, often breaking along district boundaries;[43] for instance, educational prospects vary widely for students in the Chicago Public Schools compared to those in some neighboring suburban schools.[44]

Historically, the Chicago metropolitan area has been at the center of a number of national educational movements, from the free-flowing Winnetka Plan to the regimented Taylorism of the Gary Plan.[45] In higher education, University of Chicago founder William Rainey Harper was a leading early advocate of the junior college movement; Joliet Junior College is the nation's oldest continuously operating junior college today.[46] Later U of C president Robert Maynard Hutchins was central to the Great Books movement, and programs of dialogic education arising from that legacy can be found today at the U of C, at Shimer College,[47] and in the City Colleges of Chicago and Oakton College in the Northwest suburbs.[48]

Area codes

[edit]

From 1947 until 1988, the Illinois portion of the Chicago metro area was served by a single area code, 312, which abutted the 815 area code. In 1988 the 708 area code was introduced and the 312 area code became exclusive to the city of Chicago.

It became common to call suburbanites "708'ers", in reference to their area code.

The 708 area code was partitioned in 1996 into three area codes, serving different portions of the metro area: 630, 708, and 847.

At the same time that the 708 area code was running out of phone numbers, the 312 area code in Chicago was also exhausting its supply of available numbers. As a result, the city of Chicago was divided into two area codes, 312 and 773. Rather than divide the city by a north–south area code, the central business district retained the 312 area code, while the remainder of the city took the new 773 code.

In 2002, the 847 area code was supplemented with the overlay area code 224. In February 2007, the 815 area code (serving outlying portions of the metro area) was supplemented with the overlay area code 779. In October 2007, the overlay area code 331 was implemented to supplement the 630 area with additional numbers.

Plans are in place for overlay codes in the 708, 773, and 312 regions as those area codes become exhausted in the future.

  • 312 Chicago - City (The Loop and central neighborhoods, e.g. the Near North Side)
  • 773 Chicago - City (Everywhere else within the city limits, excluding central area)
  • 872 Chicago - City (overlay for 312 & 773, effective November 7, 2009)
  • 847/224 (North and Northwest Suburbs)
  • 630/331 (Outer Western Suburbs)
  • 708 (South and Near West Suburbs)
  • 815/779 (Rockford & Joliet: Far Northwest/Southwest Suburbs)
  • 219 (Northwest Indiana)
  • 574 (North-central Indiana)
  • 262 (Southeast Wisconsin surrounding Milwaukee County)

Proposed overlays

[edit]
  • 464 overlay for 708 (January 21, 2022, rollout)

See also

[edit]
  • Index of Illinois-related articles

References

[edit]
  1. ^ a b "Elevations of the 50 Largest Cities". U.S. Geological Survey. Archived from the original on November 9, 2013. Retrieved January 23, 2016. Chicago city proper only
  2. ^ "2020 Population and Housing State Data". United States Census Bureau, Population Division. August 12, 2021. Retrieved November 19, 2021.
  3. ^ "USA: Combined Metropolitan Areas". CityPopulation.de. August 2021. Retrieved November 19, 2021.
  4. ^ "Total Gross Domestic Product for Chicago-Naperville-Elgin, IL-IN-WI (MSA)". Federal Reserve Economic Data. Federal Reserve Bank of St. Louis.
  5. ^ "Annual Estimates of the Resident Population for Combined Statistical Areas in the United States and Puerto Rico: April 1, 2010 to July 1, 2019 (CSA-EST2019-ANNRES)". United States Census Bureau, Population Division. March 2020. Retrieved May 5, 2020.
  6. ^ "Annual Estimates of the Resident Population for Metropolitan Statistical Areas in the United States and Puerto Rico: April 1, 2010 to July 1, 2019 (CBSA-MET-EST2019-ANNRES)". United States Census Bureau, Population Division. March 2020. Retrieved May 5, 2020.
  7. ^ "CAEMP25N Total Full-Time and Part-Time Employment by NAICS Industry 1/ 2018". Bureau of Economic Analysis. November 14, 2019. Retrieved May 5, 2020.
  8. ^ "CAGDP1 Gross Domestic Product (GDP) summary by county and metropolitan area 2018". Bureau of Economic Analysis. December 12, 2019. Retrieved May 5, 2020.
  9. ^ "Economy". Worldbusinesschicago.com. Retrieved October 3, 2017.
  10. ^ "Chicago Named Nation's Top Metro Area for Corporate Relocation For the Sixth Straight Year". World Business Chicago. March 25, 2019. Retrieved July 21, 2019.
  11. ^ a b c "Metropolitan and Micropolitan Statistical Areas Population Totals and Components of Change: 2020-2021". Census.gov. United States Census Bureau. Retrieved February 12, 2023.
  12. ^ "The World's Cities in 2018" (PDF). United Nations, Department of Economic and Social Affairs, Population Division. Retrieved May 5, 2020.
  13. ^ As defined by Construction Data Company.
  14. ^ a b Fuller, Jack (2005). "Chicagoland". The Electronic Encyclopedia of Chicago. Chicago Historical Society. Retrieved February 20, 2010.
  15. ^ "The Press: The Colonel's Century". TIME. June 9, 1947. Archived from the original on September 18, 2008. Retrieved February 20, 2010.
  16. ^ O'Donnell Bennett, James (July 27, 1926). "Chicagoland's Shrines: A Tour of Discoveries". Chicago Daily Tribune (1923-1963). Archived from the original on September 10, 2010. Retrieved February 20, 2010.
  17. ^ Cronon (1992); Keating (2005); Keating (2004)
  18. ^ "Classifieds map of Chicagoland". Chicagotribune.com. Retrieved May 30, 2011.
  19. ^ [1] Archived November 10, 2006, at the Wayback Machine
  20. ^ "About Chicagoland". Chicagoland Chamber of Commerce. Archived from the original on October 29, 2013. Retrieved October 25, 2013.
  21. ^ "Bidtool Coverage area: Chicago, Indiana, Wisconsin, Colorado, Kentucky project leads". Bidtool.net. Archived from the original on July 15, 2011. Retrieved May 30, 2011.
  22. ^ Mariner, Richard D. (July 10, 2018). "Collar Counties". The Electrictronic Encyclopedia of Chicago. Chicago, IL: Chicago Historical Society (2005), Newberry Library (2004).
  23. ^ "Chicago Metropolitan Agency for Planning". Chicagoareaplanning.org. Archived from the original on August 12, 2006. Retrieved May 30, 2011.
  24. ^ "About - CMAP". Cmap.illinois.gov. Retrieved September 7, 2015.
  25. ^ Nowak, David J.; Hoehn, Robert E. III; Bodine, Allison R.; Crane, Daniel E.; Dwyer, John F.; Bonnewell, Veta; Watson, Gary. (September 17, 2013). "Urban trees and forests of the Chicago region". Nrs.fs.fed.us. doi:10.2737/NRS-RB-84. Retrieved September 7, 2015.
  26. ^ "Regional Tree Census | The Morton Arboretum". Mortonarb.org. Archived from the original on May 15, 2015. Retrieved September 7, 2015.
  27. ^ "Grid View: Table B03002 - Census Reporter". censusreporter.org. Retrieved June 29, 2024.
  28. ^ "Grid View: Table B04006 - Census Reporter". censusreporter.org. Retrieved June 29, 2024.
  29. ^ "Grid View: Table B02018 - Census Reporter". censusreporter.org. Retrieved June 29, 2024.
  30. ^ "Grid View: Table B03001 - Census Reporter". censusreporter.org. Retrieved June 29, 2024.
  31. ^ "Grid View: Table B02009 - Census Reporter". censusreporter.org. Retrieved June 29, 2024.
  32. ^ "Kendall County is fastest growing in the nation". Daily Herald. Retrieved May 30, 2011.
  33. ^ "Census profile: Chicago-Naperville-Elgin, IL-IN-WI Metro Area". Census Reporter. Retrieved June 29, 2024.
  34. ^ "Historical Metropolitan Area Definitions". Census.gov. Retrieved May 30, 2011.
  35. ^ "List of 2020 Census Urban Areas". United States Census Bureau. Retrieved January 7, 2023.
  36. ^ Carl Sandburg. "Chicago". Poetry: A Magazine of Verse, vol. 3, no. 6 (March 1914):191-192.
  37. ^ RON STARNER. "TOP METROS OF 2007 - Site Selection magazine, March 2008". Siteselection.com. Retrieved May 30, 2011.
  38. ^ RON STARNER (March 9, 2009). "TOP METROS OF 2008 - Site Selection magazine, March 2009". Siteselection.com. Retrieved May 30, 2011.
  39. ^ "TOP METROS OF 2009 - Site Selection Magazine, March 2010". Siteselection.com. Archived from the original on July 2, 2011. Retrieved May 30, 2011.
  40. ^ Brat, Ilan (November 8, 2006). "Tale of a Warehouse Shows How Chicago Weathers a Decline". The Wall Street Journal. p. A1. Retrieved February 20, 2010.
  41. ^ "Chicago Highlighted as the US Railroad Capital by Trains Magazine". WTTW. February 23, 2017. Retrieved March 23, 2019.
  42. ^ "About CPS". Chicago Public Schools. Retrieved January 26, 2015.
  43. ^ Moore, Natalie (November 12, 2014). "Why so few white kids land in CPS — and why it matters". WBEZ. Archived from the original on January 17, 2015. Retrieved January 26, 2015.
  44. ^ Bogira, Steve (October 17, 2012). "Two students, two high schools, two divergent paths to college". Chicago Reader.
  45. ^ Thiede, Robert. "Gary Plan". Britannica.com. Retrieved January 16, 2015.
  46. ^ Sydow, Debbie; Alfred, Richard (2012). Re-visioning Community Colleges: Positioning for Innovation. Rowman & Littlefield Publishers. p. 13. ISBN 978-1442214880.
  47. ^ Ronson, Jon (December 6, 2014). "Shimer College: The Worst School in America?". The Guardian.
  48. ^ "Great Books program". Oakton Community College. Retrieved January 26, 2015.

Further reading

[edit]
  • Fischer, Paul B. (July 28, 1993). Racial and Locational Patterns of Subsidized Housing in the Chicago Suburbs: A Report to the MacArthur Foundation (Archive). Lake Forest, Ill.: Lake Forest College. Report to the MacArthur Foundation.
  • Lewinnek, Elaine (2014). The Working Man's Reward: Chicago's Early Suburbs and the Roots of American Sprawl. Oxford: Oxford University Press.
[edit]
  • Encyclopedia of Chicago (2004), comprehensive coverage of city and suburbs, past and present
  • U.S. Census Urbanized Area Outline Map (2000)
  • Chicago-Naperville-Michigan City, IL-IN-WI Combined Statistical Area (2012) map
  • Illinois CBSAs and Counties (2013) map
  • U.S. Census Bureau Chicago city, Illinois QuickFacts
  • Metropolitan and Micropolitan Statistical Areas
  • About Metropolitan and Micropolitan Statistical Areas
  • History of Metropolitan Areas
  • Metropolitan and Micropolitan Statistical Areas Population Totals and Components of Change: 2010–2019

 

Foundation(s) or The Foundation(s) may refer to:

Common uses

[edit]
  • Foundation (cosmetics), a skin-coloured makeup cream applied to the face
  • Foundation (engineering), the element of a structure which connects it to the ground, and transfers loads from the structure to the ground
  • Foundation (evidence), a legal term
  • Foundation (nonprofit), a type of charitable organization
    • Foundation (United States law), a type of charitable organization in the U.S.
    • Private foundation, a charitable organization that might not qualify as a public charity by government standards

Arts, entertainment, and media

[edit]

Film and TV

[edit]
  • The Foundation, a film about 1960s-1970s Aboriginal history in Sydney, featuring Gary Foley
  • The Foundation (1984 TV series), a Hong Kong series
  • The Foundation (Canadian TV series), a 2009–2010 Canadian sitcom
  • "The Foundation" (Seinfeld), an episode
  • Foundation (TV series), an Apple TV+ series adapted from Isaac Asimov's novels

Games

[edit]
  • Foundation (video game), a city-building game (2025)
  • Foundation, an Amiga video game
  • The Foundation, a character in 2017 game Fortnite Battle Royale

Literature

[edit]
  • Foundation (book series), a series of science fiction books by Isaac Asimov
    • Foundation (Asimov novel), the first book in Asimov's series, published in 1951
  • Foundation (b-boy book), by Joseph G. Schloss
  • Foundation (Lackey novel), a 2008 fantasy novel by Mercedes Lackey

Music

[edit]
  • The Foundations, a British soul group
  • Foundations (EP), by Serj Tankian

Albums

[edit]
  • Foundation (Brand Nubian album)
  • Foundation (Breakage album)
  • Foundation (Doc Watson album)
  • Foundation (Magnum album)
  • Foundation (M.O.P. album)
  • Foundation, a 1997 compilation album by Die Krupps
  • The Foundation (Geto Boys album)
  • The Foundation (Pep Love album), 2005
  • The Foundation (Zac Brown Band album)
  • The Foundations (album), by 4 Corners

Songs

[edit]
  • "Foundation", a 1983 song by Spandau Ballet from the album True
  • "Foundation", a 1998 song by Brand Nubian from the eponymous album Foundation
  • "Foundation", a 2009 song by M.O.P. from the eponymous album Foundation
  • "Foundation", a 2010 song by Breakage from the eponymous album Foundation
  • "Foundation", a 2015 song by Years & Years from Communion
  • "Foundations" (song), by Kate Nash
  • "The Foundation" (song), by Xzibit

Other uses in arts, entertainment, and media

[edit]
  • Foundation – The International Review of Science Fiction, a literary journal
  • The Foundation Trilogy (BBC Radio), a radio adaption of Asimov's series
  • The SCP Foundation, a fictional organization that is often referred to in-universe as "The Foundation"

Education

[edit]
  • Foundation degree, a British academic qualification
  • Foundation school, a type of school in England and Wales
  • Foundation Stage, a stage of education for children aged 3 to 5 in England
  • University Foundation Programme, a British university entrance course

Science and technology

[edit]
  • Foundation (framework), a free collection of tools for creating websites and web applications by ZURB
  • Foundation Fieldbus, a communications system
  • Foundation Kit, an Apple API

Companies

[edit]
  • Foundation Medicine, a genomic profiling company

See also

[edit]
  • All pages with titles beginning with Foundation
  • All pages with titles beginning with The Foundation
  • Foundations of mathematics, theory of mathematics
Photo
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Jim de Leon

(5)

It was a pleasure to work with Rick and his crew. From the beginning, Rick listened to my concerns and what I wished to accomplish. Out of the 6 contractors that quoted the project, Rick seemed the MOST willing to accommodate my wishes. His pricing was definitely more than fair as well. I had 10 push piers installed to stabilize and lift an addition of my house. The project commenced at the date that Rick had disclosed initially and it was completed within the same time period expected (based on Rick's original assessment). The crew was well informed, courteous, and hard working. They were not loud (even while equipment was being utilized) and were well spoken. My neighbors were very impressed on how polite they were when they entered / exited my property (saying hello or good morning each day when they crossed paths). You can tell they care about the customer concerns. They ensured that the property would be put back as clean as possible by placing MANY sheets of plywood down prior to excavating. They compacted the dirt back in the holes extremely well to avoid large stock piles of soils. All the while, the main office was calling me to discuss updates and expectations of completion. They provided waivers of lien, certificates of insurance, properly acquired permits, and JULIE locates. From a construction background, I can tell you that I did not see any flaws in the way they operated and this an extremely professional company. The pictures attached show the push piers added to the foundation (pictures 1, 2 & 3), the amount of excavation (picture 4), and the restoration after dirt was placed back in the pits and compacted (pictures 5, 6 & 7). Please notice that they also sealed two large cracks and steel plated these cracks from expanding further (which you can see under my sliding glass door). I, as well as my wife, are extremely happy that we chose United Structural Systems for our contractor. I would happily tell any of my friends and family to use this contractor should the opportunity arise!

Chris Abplanalp

(5)

USS did an amazing job on my underpinning on my house, they were also very courteous to the proximity of my property line next to my neighbor. They kept things in order with all the dirt/mud they had to excavate. They were done exactly in the timeframe they indicated, and the contract was very details oriented with drawings of what would be done. Only thing that would have been nice, is they left my concrete a little muddy with boot prints but again, all-in-all a great job

Dave Kari

(5)

What a fantastic experience! Owner Rick Thomas is a trustworthy professional. Nick and the crew are hard working, knowledgeable and experienced. I interviewed every company in the area, big and small. A homeowner never wants to hear that they have foundation issues. Out of every company, I trusted USS the most, and it paid off in the end. Highly recommend.

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