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English: Composite illustration of hand drilling marks on the granite walls inside of CPRR Tunnel #6 (the "Summit Tunnel") and a piece of granite removed from the tunnel after blasting with a drill mark. Both digital photographs and composite illustration by the uploader ( Centpacrr). Drilled granite sample in uploader's collection, "The Cooper Collection of US Railroadiana".
Date 23 February 2013 (original upload date)
Source Transferred from en.wikipedia to Commons.
Author Centpacrr at English Wikipedia

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Original upload log

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
2013-02-23 12:44 810×583× (327224 bytes) Centpacrr Composite illustration of hand drilling marks on the granite walls inside of [[Central Pacific Railroad|CPRR]] Tunnel #6 (the "Summit Tunnel") and a piece of granite removed from the tunnel after blasting with a drill mark. <small>Both digital photogr...

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23 February 2013

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e428c421d36b049a2103134201457145ae1adff9

327,224 byte

583 pixel

810 pixel

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Date/TimeThumbnailDimensionsUserComment
current 03:18, 28 February 2016 Thumbnail for version as of 03:18, 28 February 2016810 × 583 (320 KB)FastilyCloneTransferred from enwp
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