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1800 - Grid and Alleys,
The young federal government brought up the land into squares and made it possible for them to apply allies. Alleys have been apart of the Chicago infrastructure since the beginning of the 19th century. -
1830 - The Benefits, Needs, and Providing Service
Alleys were useful for keeping the working parts of the urban life out of site. The Chicago alleys were laid out for the practical needs of the city. 58 blocks of the alley were the original town flat in 1830 which provided service access to the property facing the main street. -
1848 - Wood Block Pavement
The woodblock pavement was invented by Samuel Nicolson who was the superintendent of Boston and Roxbury Mill Corporation. -
1890 - The replacement
The woodblock was replaced with brick or Belgian block paving schemes -
1900 - Expansion of Alleys
By 1900, 98% of the cityś residential blocks had alleys -
1920 - Transit System
The transit system formed the backbone of the city. Trains; cars -
2002
In 2002, wood paved alleys were added in historical places.