Despite the repercussions of Vaux's revisions, Stranahan championed the revised proposal. Vaux recruited Olmsted and formally presented the plan in February 1866. The revised plan was accepted by May. Construction started the following month, and initial work focused on draining the land. Then, the roads, bridal paths, and walks within Prospect Park were graded and individual features were landscaped. Three scenic roads, the West, Center, and East Drives, were built within the perimeters of the park. Depending on the time of year, between 250 and 2,000 workers were employed. Much of the landscaping focused on removing obstructions such as pits and swamps, and enhancing other natural features such as hills. Trees were only removed if they blocked a roadway or path that was being built.