In addition to walls, there are a series of stone paths that divided the farmed area into plots of variable size. These structures are unique because although many people used such systems at the time, Kohala has some of the few to survive. The leeward slopes of Kohala were used for sugarcane plantations in the late 19th century. The trip from the fields to the mills and then boats was mechanized by steam locomotive in 1883. Several plantations on the mountain were consolidated into the Kohala Sugar Company by 1937. At the peak of its production, the company had 600 employees, of land, and a capacity of of raw sugar per year. In 1975 the company finally closed down.