When students returned to campus on the weekend of Jan. 21, they were greeted by large piles of dirt and a wire fence with signs warning of danger surrounding a pit in the ground at the center of Skinner Green. Facilities Management began this excavation process due to a leak in the steam line that runs beneath the green. Throughout the day, workers were seen driving a van back and forth with supplies over pads placed on top of the Green’s muddy surface. At the end of January, the center of the excavation site contains two thin pipes, one green and one gray, overlapping a much thicker pipe and a blue rod sticking into one of the tubes.