Scale [ca. 1:221,760. 1 in. to approx. 3.5 miles] ; 1 map : col. ; 51 x 62 cm ; Relief shown by contours and spot heights ; "Prepared in Washington Office from compilation made in Las Vegas Office." ; "Map no. 24000." ; Includes township and range grid ; Shows power lines, triangulation stations, boundary monuments, roads, telephone lines, mines, bench marks, etc. ; Department of the Interior, Bureau of Reclamation.