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The Romans were the first to plan and construct alleys
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The I&M Canal Commission hired James Thompson to layout Chicago at the eastern end of the canal in 1830. To attract prospective land buyers, Thompson included alleys in their plans.
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Samuel Nicolson was the superintendent of Boston and Roxbury Mill Corporation when he invented the process in 1848
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Nicolson's method to pave streets is brought to Chicago
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Divergence of the alley trend begins
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Wood block paving was a way to solve the infrastructural problem of muddy streets
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Wood block paving wasn't exactly durable which is why Belgian block paving became popular
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By 1900, over 98 percent of the city's residential blocks had alleys
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Around World War I, “modern” planning theory declared alleys wasteful and undesirable, and the last outer fringes of the city of Chicago, along with the vast majority of the suburban territory, were developed thereafter without alley
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Alleys have survived the new millennium largely intact and contribute hugely to the pulse of Chicago's daily life