Search for all of "Hoover Dam", all of "United States Bureau Of Reclamation"

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1 Object thumbnail
Topographic map of Boulder Canyon Project, Hoover Dam area, 1932 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." ;...
2 Object thumbnail
Topographic map of the Boulder Canyon Reservoir site, 1930 Scale [ca. 1:144,000. 1 in. to approx. 12,000 ft.] ; 1 map : col. ; 51 x 91 cm ; Relief shown by contours and spot heights ; "Map no. 23800" ; Includes township and range grid ; Includes two...
3 Object thumbnail
Topographic map of Boulder Canyon Project, Boulder Dam area, 1940 Scale [ca. 1:221,760. 1 in. to approx. 3.5 miles] ; 1 map : col. ; 51 x 71 cm ; Relief shown by contours and spot heights ; Includes township and range grid ; "Map no. 40-40" ; Includes index...
 

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