Built about 1899, Dorn's Mill was a steam-powered mill that used a milling process pioneered earlier by inventor Oliver Evans and virtually eliminated manual labor. First known as the McCormick Enterprise Ginnery, it became the Dorn-Finley Co. in 1917, with the purpose "to operate, conduct, and carry on an oil mill, cotton gin and grist mill," and it closed in the 1940s. Nearby, area resident William B. Dorn discovered gold and developed the Dorn Gold Mine, which produced a yield of $72,000 from 1857 to 1859. The mine was later operated by Cyrus Hall McCormick, inventor of the reaper, for whom the town of McCormick is named, and it operated at intervals until as late as the 1930s.