Image: Hoover-dam-contour-map
Size of this preview: 800 × 305 pixels. Other resolutions: 320 × 122 pixels | 1,520 × 580 pixels.
Original image (1,520 × 580 pixels, file size: 355 KB, MIME type: image/jpeg)
Description: Hoover Dam plan. 1930
Title: Hoover-dam-contour-map
Credit: U.S. Department of Interior, Bureau of Reclamation, Boulder Canyon Project, map.
Author: Mapmakers in employ of U.S. Department of Interior; signatures not readable.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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