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Butte, Montana. Anaconda Copper Mining Company. Pneumatic drilling in copper mine

Butte, Montana. Anaconda Copper Mining Company. Pneumatic drilling in ...

Picryl description: Public domain image of a coal mine, mining, free to use, no copyright restrictions.

Pneumatic steam hammer and forges, blacksmith shop at mines, Scranton, Pennsylvania

Pneumatic steam hammer and forges, blacksmith shop at mines, Scranton,...

Stereo copyrighted by the Keystone View Co. No. 7030. This record contains unverified, old data from caption card. Caption card tracings: Ph. Ind.; Blacksmith; Mines; Geogr.

Tennessee Valley Authority. Construction of Douglas Dam. Pneumatic winch operator at TVA's new Douglas Dam on the French Broad River. This dam will be 161 feet high and 1,682 feet long, with a 31,600 acre reservoir area extending forthy-three miles upstream. With a useful storage capacity of approximately 1,330,000 acre feet this reservoir will make possible the addition of nearly 100,000 kilowatts of continuous power to the TVA system and in dry years and almost 170,000 kilowatts in the average year

Tennessee Valley Authority. Construction of Douglas Dam. Pneumatic win...

Picryl description: Public domain image of a farmer, 1930s, 20th-century dust bowl era, free to use, no copyright restrictions.