The plan was formulated by a three-member commission made up of Gouverneur Morris, the lawyer John Rutherford, and the surveyor Simeon De Witt.
The plan called for a regular grid of streets and property lines without regard to the topography of the island itself. The plan called for twelve numbered avenues running north and south roughly parallel to the shore of the Hudson River, as well as 155 orthogonal cross streets.
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 east-west cross streets were to be only 200 feet apart, resulting in a grid of approximately 2000 long, narrow blocks.