park conditions. A 1973 report noted that the park suffered from severe erosion and tree decay, and that individual structures were being vandalized or neglected. The Central Park Community Fund was subsequently created based on the recommendation of a report from a Columbia University professor. The Fund then commissioned a study of the park's management and suggested the appointment of both a NYC Parks administrator and a board of citizens. In 1979, Parks Commissioner Gordon Davis established the Office of Central Park Administrator and appointed Elizabeth Barlow, the executive director of the Central Park Task Force, to the position. The Central Park Conservancy, a nonprofit organization with a citizen board, was founded the following year. 1970s to 2000s: restoration Under the leadership of the Central Park Conservancy, the park's reclamation began by addressing needs that could not be met within NYC Parks' existing resources. The Conservancy hired interns and a small restoration staff to reconstruct and repair unique rustic features, undertaking horticultural projects, and removing graffiti under the broken windows theory which advocated removing visible signs of decay. The first structure to be renovated was the Dairy, which reopened as the park's first visitor center in 1979. The Sheep Meadow, which reopened the following year, was the first landscape to be restored. Bethesda Terrace and Fountain, the USS Maine National Monument, and the Bow Bridge were also rehabilitated. By then, the Conservancy was engaged in design efforts and long-term restoration planning, and in 1981, Davis and Barlow announced a 10-year, $100 million "Central Park Management and Restoration Plan". The long-closed Belvedere Castle was renovated and reopened in 1983, while the Central Park Zoo closed for a full reconstruction that year. To reduce the maintenance effort, large gatherings such as free concerts were canceled. On completion of the planning stage in 1985, the Conservancy launched its first campaign and mapped out a 15-year restoration plan. Over the next several years, the campaign restored landmarks in the southern part of the park, such as Grand Army Plaza and the police station at the 86th Street transverse; while Conservatory Garden in the northeastern corner of the park was restored to a design by Lynden B. Miller. Real estate developer Donald Trump renovated the Wollman Rink in 1987 after plans to renovate it were delayed repeatedly. The following year, the Zoo reopened after a $35 million, four-year renovation. Work on the northern end of