structural:expansion, linguistic:paraphrasing
Planning

Between 1821 and 1855, New York City's population nearly quadrupled. As the city expanded northward up Manhattan, people were drawn to the few existing open spaces, mainly cemeteries, for passive recreation. These were seen as escapes from the noise and chaotic life in the city, which at the time was almost entirely centered on Lower Manhattan. The Commissioners' Plan of 1811, the outline for Manhattan's modern street grid, included several smaller open spaces but not Central Park. As such, John Randel Jr. had surveyed the grounds for the construction of intersections within the modern-day park site. The only remaining surveying bolt from his survey is embedded in a rock north of the present Dairy and the 66th Street transverse, marking the location where West 65th Street would have intersected Sixth Avenue.