Construction workers put up a tree in a precarious place during the construction of the on campus hospital, circa 1983. The photograph is part of the University Hospitals Board of Governors records at the University Archives.
Thanks to several comments (see below), a more accurate description of the image is that of “topping out” the frame of the hospital. Although the photograph was taken between November and January, the tree is much more likely a representation of a long time tradition in building construction.
The photograph was taken on December 13, 1983.