Genre/Form: Thematic maps. Scale 1:62,500 (W 115°15´--W 114°45´/N 36°15´--N 36°00´). 1 map : col. ; 45 x 72 cm. Series: Water-supply paper (Washington, D.C.) ; 1780. Relief shown by contours. Originally published as plate 11 of Available water supply of the Las Vegas ground-water basin, Nevada, by Glenn T. Malmberg, published by the Geological Survey in 1965 as its Water-supply paper 1780. Includes township and range lines. Interior, Geological Survey

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.'

'Exhibit A'. 'Approved Jan. 26, 1918.' Includes discharge figures and plans for improvements to springs for the municipal water system including diagrams of spillway openings, etc. Scale [ca. 1:1200] 1 in.=100 feet -- Scale [ca. 1:120] 1 in.=10 feet -- Scale [ca. 1:240] 1 in.=20 feet -- Scale [ca. 1:24] 1 in.=2 feet -- Scale [ca. 1:2400] 1 in.=200 feet. Vertical scale [ca. 1:48] 1 in.=4 feet -- Scale [ca. 1:12] 1 in.=1 foot.

'Exhibit A'. 'Approved Sept. 21, 1916.' '2-N-1719' handwritten in lower right corner. 'W.E.J."--Lower left corner. "L-44 - 50 to 61. T-75 - 17 & 46"--Upper left corner. Includes discharge figures and plans for improvements to springs. Scale [ca. 1:240]. 1 in. to 20 feet. -- Scale [ca. 1:2,400]. 1 in. to 200 ft. Vertical scale [ca. 1:48]. 1 in. to 4 feet. -- Scale [ca. 1:4,800]. 1 in. to 100 feet. 1 map. Contents: Detail at springs -- Profile -- Alignment.