Page 143

(left) Captains of Industry at the dedication of Gay Mine railhead, September 22, 1948. L to R, Jack R. Simplot, Harry Morrison of Morrison-Knudsen (builders of the railroad), Jack Avery (Vice President of the Union Pacific) holding Gay Simplot, Sprague Haney; J.R. Simplot Company Collection.

(center) Coiled teeth of Helicoprion, a Permian shark whose teeth are stored inside its head. Helicoprion teeth are common fossils in the Permian Phosphoria Formation. J.R. Simplot Company Collection.

(upper right) Sign at entrance to Fort Hall Indian Reservation, (July, 1984).

(right) Aerial photograph of one of the southern pits of the Gay Mine, (September, 1989)


  1. Brown, Jennie Broughton, 1932, Fort Hall on the Oregon Trail, (with Ferry Butte by Susie Boice Trego): Caldwell, Idaho, The Caxton Printers, Ltd., 466 p.

  2. Haines, A.L., editor, 1965, Osborne Russell's Journal of a Trapper: University of Nebraska Press, 191 p.

  3. Hladky, F.R., Kellogg, K.S., Oriel, S.S., Link, P.K., Nielson, J.W., and Amerman, R.E., 1992, Geologic map of the eastern part of the Fort Hall Indian Reservation, Bannock, Bingham, and Caribou Counties, Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-2006, scale 1:50,000.

  4. Link, P.K., Nielson, J.W., McDonald, C., and Smith, J.L., 1990, History and geology of the J.R. Simplot Company Gay Mine, Bingham County, Idaho: in Robinson, Lee,editor, 1990 Symposium on Engineering Geology and Geotechnical Engineering, Pocatello, Idaho, p. 24-1 to 24-12.

  5. Lohse, E.S., and Holmer, R.N., editors, 1990 (2nd printing 1992), Fort Hall and the Shoshone-Bannock: Pocatello, Idaho, The Idaho State University Press, 60 p.