The project included the construction of the New York City Subway's IND Eighth Avenue Line, served by the modern-day , which contains two stations serving the park (see ). The line, which crosses directly under the park between the two stations, opened in late 1932. By March 1934, it was reported that the park was nearly complete, but that an additional $500,000 was needed for improvements. The Public Works Administration subsequently gave mayor Fiorello H. La Guardia and parks commissioner Robert Moses $800,000 in funds to complete the park. The playground at the northeast corner of the park, at Broadway and Dyckman Street, was opened on September 6, 1934. The rest of the park was opened on October 13, 1935. In total, Rockefeller had spent $3.6 million toward the park's construction. Upon Fort Tryon Park's opening, Upper Manhattan had nearly of parkland split among several non-contiguous sites, including Fort Tryon, Fort Washington, Inwood Hill, and Highbridge Parks.