It was not unusual in the Moses years, and especially the decade after his departure, to quietly remove underutilized or redundant structures. To do so was regarded as economical and prudent management. Several structures had been destroyed by the time Moses left his position as NYC Parks commissioner in May 1960. These included the Dairy, destroyed 1935; Concert Grove House, demolished 1949; Music Island, razed 1960; the Flower Garden; the Thatched Shelter, destroyed in the 1940s; the Model Yacht Club, burned down in 1956; and the Greenhouse Conservatories, taken apart in 1955.