Diamond Drill and Operator
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Title |
Diamond Drill and Operator |
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Title Caption |
This is a diamond drill rig in operation. A compressed-air motor rapidly spins the hollow shaft, down which water is forced to cool the bit, and carry away the cuttings. The core specimen rises in the hollow drill stem as the bit cuts downward. Diamond drilling is the oldest form of core drilling known. Scientists claim that the ancient Egyptians used a form of diamond core drill. About 1863, in his efforts to make a core drill wear longer, a French engineer invented the modern diamond drill, which in its essentials has changed little since then. Two pounds of diamonds were bought by the U.S.B.R. for $50,696 for drilling operations. |
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Description |
In a study to determine the best location for the dam Engineers used diamond drilling to determine the composition of the Grand Coulee Dam site. Later they would utilize diamond drills to create grout holes that were pressure grouted to fill cracks and crevices in the light colored granite foundation. (Clifford R. Koester. A History of the Columbia Basin Project II, 164) |
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Date Original |
1930/1945 |
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Author |
Koester, Clifford R.; photographer unknown |
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Library of Congress Subject Headings |
United States--Washington (State)--Grant County--Grand Coulee Dam site; United States--Washington (State)--Grant County--Grand Coulee Dam |
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TGM Subject |
Construction equipment; Laborers; Surveying; Drilling and boring machinery |
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Type |
Image |
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Genre |
Photographs |
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Geographic Area |
United States--Washington (State)--Grant County--Grand Coulee Dam site |
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Identifier |
cg709b1v2p165.jpg |
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Source |
Is found in A History of the Columbia Basin Project (vol. 2, pg. 165), Cage 709, Clifford R. Koester Papers http://libraries.wsu.edu/masc/finders/cg709.htm at Washington State University Libraries' Manuscripts, Archives, and Special Collections (MASC) http://libraries.wsu.edu/masc |
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Rights |
http://rightsstatements.org/vocab/NKC/1.0/ |
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Rights Notes |
No known copyright. Item is in public domain as it was created by United States government. |
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Digital Format |
Original photographic prints were scanned at 24 bit 3000 pixels by the long side for master TIFF files on an Plustek OpticBook 3600 Plus. Also, 24 bit 150 PPI JPEGs were created with the OpticBook 3600 Plus and added to the CONTENTdm database at the WSU Libraries |
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Notes |
Part of Western Waters Digital Library, http://westernwaters.org/ |
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Language |
English |
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Rating |
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