Additional land was purchased in 1969, and in 1974 another addition included a three-story rebuilding of the east wing. Further reworking of the east wing added a conservation lab, loading dock, and a second public entrance to the building in 1979, and the following year, gallery space was expanded by 28,000 square feet (2,600 m²). In 1986 another expansion project was planned and architect Edward Larrabee Barnes, in conjunction with local architect KPS Group, Inc., was selected to oversee the design, which included provision for a new outdoor sculpture garden and 50,000 square feet (5,000 m²) of exhibition space bringing the total to 180,000 square feet (15,400 m²).