Image: HooverDamHighScaler
HooverDamHighScaler.jpg (500 × 396 pixels, file size: 54 KB, MIME type: image/jpeg)
Description: High scalers drilling into canyon wall 500 feet above the Colorado River in Black Canyon, site of Hoover Dam, 1932.
Title: HooverDamHighScaler
Credit: http://www.usbr.gov/lc/hooverdam/images/WashNo01333.jpg
Author: Bureau of Reclamation
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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