The land was up for grabs once Hudson's Bay Company left and many farmers bought the land. In 1906, the DuPont chemical company purchased a area from the farmers for construction of an explosives plant, as the company was in the midst of expanding into the west. The plant was built on the initial 1833 Ft. Nisqually site and was completed in 1909. During its nearly 70-year history, the plant produced dynamite for the U.S. military as well as for the construction of various civilian projects including the Grand Coulee Dam, the Alcan Highway, and the Panama Canal.