Twenty blocks equals one mile

The Commissioners’ Plan of 1811 was very specific about the size and spacing of the streets and avenues that made up the grid.  Each avenue was to be one hundred feet wide. The avenues in the center of the island were to be separated by 922 feet, and the avenues along the waterfront were to be slightly closer. The numbered cross streets running east-west are 60 feet wide, with about 200 feet between each pair of streets.  Each combined street and block face adds up to about 260 feet.  The result, 20 blocks equals approximately one mile!

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