Hand-drawn, hand-colored and annotated map showing the 280 foot level of the Combination Mine. Printed on map: 'Mohawk, col. el. 5958.48; Hayes & Monnette No. 2, col. el. 5935.7; Hayes & Monnette No. 1, col. el. 5925.8; Truett, col. el. 5938.8; Combination, col. el. 5986.31.'
Hand-drawn, hand-colored and annotated map showing the 600 foot, or third, level of the Clermont Mine. Handwritten at top of map: 'Clermont, 3rd level.'
'Edition of 1921.' 'W. H. Herron, Acting Chief Geographer; Geo. R. Davis, Geographer In Charge; Topography by H. H. Hodgeson, N. E. Ballmer, and W. B. Upton, Jr.; Control by H. H. Hodgeson, Roscoe Reeves, and D. S. Birkett. Surveyed in 1916.' At top of map: ' Topography, State of Nevada.' At upper left corner: ' Department of the Interior, Albert B. Fall, Secretary; U.S. Geological Survey, George Otis Smith, Director.' Southern Nevada Mining Map Collection. 15 minute series (topographic) Nevada.
At upper left corner: 'Department of the Interior, U.S. Geological Survey.' 'E. M. Douglas, geographer; R. G. Chapman, in charge of section; triangulation and topography by R. H. Chapman and B. D. Stewart. Surveyed in 1905.' 'Engraved April 1906 by U.S.G.S.' 'Edition of June 1908, repritned 1929.' 'Polyconic projection. North American datum.' Guide to Topographic Maps of the United States series on map verso. UNLV Special Collections Southern Nevada Mining Map Collection