File:Stope in Treadwell gold mine.jpg

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English: A large stope in the Treadwell gold mine, Douglass Island, Alaska, 1908. A stope is an excavated underground cavity. The stopes at Treadwell were left mostly full of broken ore to provide a place for the miners to stand as they excavated upwards, then emptied when completed. Thick walls were left as pillars between stopes to support the rock overhead.
Date copyright 1909 photo 1908
Source Through the Yukon and Alaska [1] Mining and Scientific Press, San Francisco, 1909 p31.
Author T.A. Rickard photographer probably Rickard
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current02:10, 3 December 2010Thumbnail for version as of 02:10, 3 December 20102,360 × 1,571 (727 KB)Dankarl (talk | contribs){{Information |Description={{en|1=A large stope in the Treadwell gold mine, Douglass Island, Alaska, 1908. A stope is an excavated underground cavity. The stopes at Treadwell were left mostly full of ore to provide a place for the miners to stand as they

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