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Core drill hole

Description: Core drill hole U-13 Upstream face Dam 1 approx. 108 to West of West end of gunnited seam.
Type: Visual Materials(Opens in new tab)
Date: 5/8/1937
Call number: photCL SCE 02 - 20108
Find out more: View in the Huntington Digital Library(Opens in new tab); View in the Library catalog(Opens in new tab)

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Core drill hole upstream face Dam 1
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Upstream core drill hole Dam 1
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Upstream face Dam 1, showing condition of concrete in vicinity of core-drill hole U-2 prior to drilling
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Upstream face Dam 1, showing condition of concrete in vicinity of core-drill hole U-2 prior to drilling.
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Upstream core drill hole Dam #1
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Upstream core drill hole Dam #1. U-2 station 11;30.4, Elev. 6898.9.
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Upstream core drill hole Dam #1
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Upstream core drill hole Dam #1. U-4 station 10;10.5, Elev. 6898.1.
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Upstream core drill hole Dam 1
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Upstream core drill hole Dam 1 - U-1 Station 10+98.0 Elev. 6897.5.
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