Gardner was a mining engineer who worked with the United States Bureau of Mines from 1918 to 1956. From 1906 to 1911 he worked with the Utah Copper Company and the Utah Apex Mining Company, and then with the United States Forest Service from 1911 to 1918. With the Bureau of Mines Gardner became superintendent of the Tucson station in 1925, head of the oil shale mining division in Denver in 1947, and then in 1949 was appointed chief mining engineer for the Bureau of Mines in Washington, D.C. While with the Bureau of Mines, Gardner was a prolific technical writer on mining methods and oil shale.
From the description of Papers, 1908-1968. (University of Wyoming, American Heritage Center). WorldCat record id: 27845438
