in 1996. In 2014, Carnegie Mellon re-dedicated the University Center as the Cohon University Center in recognition of the eighth president of the university, Jared Cohon. A large grassy area known as "The Cut" forms the backbone of the campus, with a separate grassy area known as "The Mall" running perpendicular. The Cut was formed by filling in a ravine (hence the name) with soil from a nearby hill that was leveled to build the College of Fine Arts building. The northwestern part of the campus (home to Hamburg Hall, Newell-Simon Hall, Smith Hall, and Gates Hillman Complex) was acquired from the United States Bureau of Mines in the 1980s. In 2006, Carnegie Mellon Trustee Jill Gansman Kraus donated the -tall sculpture Walking to the Sky, which was placed on the lawn facing Forbes Avenue between the Cohon University Center and Warner Hall. The sculpture was controversial for its placement, the general lack of input that the campus community had, and its (lack of) aesthetic appeal. Carnegie Mellon has been purchasing 100% renewable energy for its electricity since 2011. In April 2015, Carnegie Mellon, in collaboration with Jones Lang LaSalle, announced the planning of a second office space structure, alongside the Robert Mehrabian Collaborative Innovation Center, an upscale and full-service hotel, and retail and dining development along Forbes Avenue. This complex will connect to the Tepper Quadrangle, the Heinz College, the Tata Consultancy Services Building, and the Gates-Hillman Center to create an innovation corridor on the university campus. The effort is intended to continue to attract major corporate partnerships to create opportunities for research, teaching, and employment with students and faculty. Campus architecture and design The campus began to take shape in the Beaux-Arts architecture style of George Carnegie Palmer and Henry Hornbostel of Palmer & Hornbostel, winners of the 1904 competition to design the original institution and later the founder of what is now the Carnegie Mellon School of Architecture. There was little change to the campus between the first and second World War. A 1938 master plan by Githens and Keally suggested acquisition of new land along Forbes Avenue, but the plan was not fully implemented. The period starting with the construction of the Hall of the Arts building (former home of the Graduate School of Industrial Administration) in 1952 and ending with Wean Hall in 1971 saw the institutional change from Carnegie Institute of Technology to Carnegie